Structural Classification of Proteins

Root: scop

Classes:

All alpha proteins [46456] (284)
1. Globin-like [46457] (2)
  core: 6 helices; folded leaf, partly opened
  1. Globin-like [46458] (4)
    uperfamily
  2. alpha-helical ferredoxin [46548] (2)
    contains two Fe4-S4 clusters
    uperfamily
2. Long alpha-hairpin [46556] (20)
  2 helices; antiparallel hairpin, left-handed twist
  1. GreA transcript cleavage protein, N-terminal domain [46557] (1)
    uperfamily
  2. Ribosomal protein L29 (L29p) [46561] (1)
    uperfamily
  3. Chaperone J-domain [46565] (1)
    uperfamily
  4. Prefoldin [46579] (1)
    uperfamily
  5. HR1 repeat [46585] (1)
    uperfamily
  6. tRNA-binding arm [46589] (4)
    formerly a class II aminoacyl-tRNA synthetase N-domain
    uperfamily
  7. Eukaryotic DNA topoisomerase I, dispensable insert domain [46596] (1)
    uperfamily
  8. C-terminal UvrC-binding domain of UvrB [46600] (1)
    uperfamily
  9. Epsilon subunit of F1F0-ATP synthase C-terminal domain [46604] (1)
    uperfamily
  10. Fe,Mn superoxide dismutase (SOD), N-terminal domain [46609] (1)
    uperfamily
  11. Sporulation inhibitor Sda [100985] (1)
    uperfamily
  12. Transcriptional repressor TraM [109631] (1)
    similar structure to L29p (scop_sf 46561); contains extra short helix; forms homodimer: an open bundle
    uperfamily
  13. DnaK suppressor protein DksA, alpha-hairpin domain [109635] (1)
    uperfamily
  14. ISY1 domain-like [140102] (1)
    uperfamily
  15. Calcyclin-binding protein-like [140106] (1)
    uperfamily
  16. Endosomal sorting complex assembly domain [140111] (3)
    forms 'fan'-like heterooligomers, in which the domains of different subunit make similar interactions at the tip of the hairpin
    uperfamily
  17. SPy1572-like [140121] (1)
    forms homodimer: an open bundle, different from the TRAM dimer
    uperfamily
  18. Rabenosyn-5 Rab-binding domain-like [140125] (1)
    uperfamily
  19. MxiH-like [140129] (1)
    Type III secretion system needle
    uperfamily
  20. YnzC-like [158221] (1)
3. Type I dockerin domain [63445] (1)
  tandem repeat of two calcium-binding loop-helix motifs, distinct from the EF-hand
  1. Type I dockerin domain [63446] (1)
    uperfamily
4. LEM/SAP HeH motif [63450] (6)
  helix-extended loop-helix; parallel helices
  1. LEM domain [63451] (1)
    uperfamily
  2. SAP domain [68906] (1)
    uperfamily
  3. Rho N-terminal domain-like [68912] (2)
    uperfamily
  4. Recombination endonuclease VII, C-terminal and dimerization domains [68918] (1)
    uperfamily
  5. DNA-binding domain of EIN3-like [116768] (1)
    decorated with additional structures
    uperfamily
  6. PRP4-like [158230] (1)
5. SOCS box-like [158234] (1)
  helix-loop-helix motif with orthogonally packed helices
  1. SOCS box-like [158235] (1)
6. RPB6/omega subunit-like [63561] (1)
  core: 2 helices and adjacent loops
  1. RPB6/omega subunit-like [63562] (2)
    the bacterial omega and eukaryotic RPB6 subunits both function in polymerase assembly; the common core is involved in conserved interactions with other subunits
    uperfamily
7. KRAB domain (Kruppel-associated box) [109639] (1)
  2 helices: one short, one long; aromatic-rich iterface
  1. KRAB domain (Kruppel-associated box) [109640] (1)
    uperfamily
8. Cytochrome c [46625] (1)
  core: 3 helices; folded leaf, opened
  1. Cytochrome c [46626] (8)
    covalently-bound heme completes the core
    uperfamily
9. DNA/RNA-binding 3-helical bundle [46688] (14)
  core: 3-helices; bundle, closed or partly opened, right-handed twist; up-and down
  1. Homeodomain-like [46689] (19)
    consists only of helices
    uperfamily
  2. Methylated DNA-protein cysteine methyltransferase, C-terminal domain [46767] (1)
    uperfamily
  3. ARID-like [46774] (1)
    contains extra helices at both N- and C-termini
    uperfamily
  4. "Winged helix" DNA-binding domain [46785] (84)
    contains a small beta-sheet (wing)
    uperfamily
  5. C-terminal effector domain of the bipartite response regulators [46894] (3)
    binds to DNA and RNA polymerase; the N-terminal, receiver domain belongs to the CheY family
    uperfamily
  6. TrpR-like [48295] (3)
    contains an extra shared helix after the HTH motif
    uperfamily
  7. Ribosomal protein L11, C-terminal domain [46906] (1)
    uperfamily
  8. Ribosomal protein S18 [46911] (1)
    uperfamily
  9. Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 [46915] (1)
    uperfamily
  10. N-terminal Zn binding domain of HIV integrase [46919] (1)
    uperfamily
  11. RNA polymerase subunit RPB10 [46924] (1)
    uperfamily
  12. Sigma3 and sigma4 domains of RNA polymerase sigma factors [88659] (3)
    uperfamily
  13. KorB DNA-binding domain-like [109709] (1)
    contains HTH motif in the common core; also contains extra N-terminal helix and C-terminal subdomain of 4 helices (left-handed superhelix)
    uperfamily
  14. Rps17e-like [116820] (1)
    uperfamily
10. Another 3-helical bundle [81602] (5)
  topologically similar to the DNA/RNA-binding bundles; distinct packing
  1. FF domain [81698] (1)
    uperfamily
  2. Protein serine/threonine phosphatase 2C, C-terminal domain [81601] (1)
    uperfamily
  3. B-form DNA mimic Ocr [101059] (1)
    uperfamily
  4. DEK C-terminal domain [109715] (1)
    uperfamily
  5. IscX-like [140319] (1)
    uperfamily
11. RuvA C-terminal domain-like [46928] (9)
  3 helices; bundle, right-handed twist
  1. DNA helicase RuvA subunit, C-terminal domain [46929] (1)
    possibly related to UBA-like domains
    uperfamily
  2. UBA-like [46934] (4)
    uperfamily
  3. post-HMGL domain-like [89000] (2)
    uperfamily
  4. CRAL/TRIO N-terminal domain [46938] (1)
    uperfamily
  5. Elongation factor TFIIS domain 2 [46942] (1)
    uperfamily
  6. Double-stranded DNA-binding domain [46950] (1)
    uperfamily
  7. Hypothetical protein AF0491, middle domain [109728] (1)
    uperfamily
  8. HBS1-like domain [109732] (1)
    possibly related to UBA-like domains
    uperfamily
  9. FGAM synthase PurL, linker domain [109736] (1)
    uperfamily
12. S13-like H2TH domain [81297] (1)
  core: 3-4 helices
  1. S13-like H2TH domain [46946] (3)
    contains a helix-two turns-helix (H2TH) motif
    uperfamily
13. Putative DNA-binding domain [46954] (1)
  core: 3 helices; architecture is similar to that of the "winged helix" fold but topology is different
  1. Putative DNA-binding domain [46955] (7)
    uperfamily
14. Spectrin repeat-like [46965] (16)
  3 helices; bundle, closed, left-handed twist; up-and-down
  1. Spectrin repeat [46966] (1)
    uperfamily
  2. Enzyme IIa from lactose specific PTS, IIa-lac [46973] (1)
    uperfamily
  3. Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain [46977] (1)
    uperfamily
  4. Smac/diablo [46984] (1)
    uperfamily
  5. BAG domain [63491] (1)
    uperfamily
  6. GAT-like domain [89009] (2)
    uperfamily
  7. Tubulin chaperone cofactor A [46988] (1)
    uperfamily
  8. Ribosomal protein S20 [46992] (1)
    uperfamily
  9. Glycogen synthesis protein GlgS [109747] (1)
    uperfamily
  10. Alpha-hemoglobin stabilizing protein AHSP [109751] (1)
    the bundle twist angle is close to zero (small positive value); similar to the RRF alpha-helical bundle, scop_sf 55194
    uperfamily
  11. PhoU-like [109755] (1)
    duplication: consists of two sequence each repeats adopting this fold
    uperfamily
  12. XseB-like [116842] (1)
    helix-swapped homodimer
    uperfamily
  13. MIT domain [116846] (1)
    uperfamily
  14. PPK N-terminal domain-like [140356] (1)
    uperfamily
  15. MIT domain-like [140361] (1)
    uperfamily
  16. Efb C-domain-like [158366] (1)
15. immunoglobulin/albumin-binding domain-like [46996] (11)
  3 helices; bundle, closed, left-handed twist; up-and-down; mirror topology to the spectrin-like fold
  1. Bacterial immunoglobulin/albumin-binding domains [46997] (2)
    uperfamily
  2. Plasmid maintenance system epsilon/zeta, antidote epsilon subunit [81710] (1)
    uperfamily
  3. Families 57/38 glycoside transferase middle domain [88688] (3)
    uperfamily
  4. Phosphoprotein XD domain [101089] (1)
    uperfamily
  5. Staphylocoagulase [101094] (1)
    duplication: consists of two domains of this fold
    uperfamily
  6. Heat shock protein 70kD (HSP70), C-terminal subdomain [100934] (1)
    uperfamily
  7. Typo IV secretion system protein TraC [101082] (1)
    uperfamily
  8. Avirulence protein AvrPto [116854] (1)
    uperfamily
  9. Coronavirus NSP7-like [140367] (1)
    uperfamily
  10. Vng1086c-like [140371] (1)
    homotetramer; comprises two dimers similar to the antidote epsilon subunit dimer
    uperfamily
  11. AF1782-like [158372] (1)
16. Peripheral subunit-binding domain of 2-oxo acid dehydrogenase complex [47004] (1)
  3 helices; bundle, closed, right-handed twist; up-and-down
  1. Peripheral subunit-binding domain of 2-oxo acid dehydrogenase complex [47005] (1)
    uperfamily
17. ChaB-like [140375] (1)
  3 helices, the first one is shorter than the other two; bundle, capped by a small, C-terminal beta-hairpin
  1. ChaB-like [140376] (1)
    uperfamily
18. Protozoan pheromone-like [47013] (2)
  3 helices; bundle, closed, left-handed twist, up-and-down
  1. Protozoan pheromone proteins [47014] (1)
    uperfamily
  2. Hypothetical membrane protein Ta0354, soluble domain [116858] (1)
    uperfamily
19. Acyl-CoA binding protein-like [47026] (2)
  core: 3 helices; bundle, closed, left-handed twist; up-and-down
  1. Acyl-CoA binding protein [47027] (1)
    uperfamily
  2. Second domain of FERM [47031] (1)
    uperfamily
20. YqgQ-like [158378] (1)
  3 helices, bundle, left-handed twist, extended overside connection between the first and second helices
  1. YqgQ-like [158379] (1)
21. Kix domain of CBP (creb binding protein) [47039] (1)
  3 helices; bundle, partly opened
  1. Kix domain of CBP (creb binding protein) [47040] (1)
    uperfamily
22. RAP domain-like [47044] (1)
  3 helices, the first one is shorter than the other two; bundle, partly opened
  1. RAP domain-like [47045] (1)
    uperfamily
23. VHP, Villin headpiece domain [47049] (1)
  3 short helices; irregular array
  1. VHP, Villin headpiece domain [47050] (1)
    uperfamily
24. BSD domain-like [140382] (1)
  core: 3 helices; triangular array; the extra N-terminal and C-terminal helices form a coiled coil structure
  1. BSD domain-like [140383] (1)
    uperfamily
25. TAF(II)230 TBP-binding fragment [47054] (1)
  3 short helices; irregular array
  1. TAF(II)230 TBP-binding fragment [47055] (1)
    uperfamily
26. S15/NS1 RNA-binding domain [47059] (1)
  3 helices; irregular array
  1. S15/NS1 RNA-binding domain [47060] (3)
    uperfamily
27. Frizzled cysteine-rich domain [63500] (1)
  Core: 3 helices; irregular array; disulfide-rich
  1. Frizzled cysteine-rich domain [63501] (1)
    uperfamily
28. T4 endonuclease V [47076] (1)
  3 helices; irregular array
  1. T4 endonuclease V [47077] (1)
    uperfamily
29. Fertilization protein [47081] (1)
  core: 3 helices; bundle, closed, right-handed twist; up-and-down
  1. Fertilization protein [47082] (1)
    uperfamily
30. PGBD-like [47089] (1)
  core: 3 helices; bundle, closed, left-handed twist; parallel
  1. PGBD-like [47090] (2)
    uperfamily
31. HMG-box [47094] (1)
  3 helices; irregular array
  1. HMG-box [47095] (1)
    uperfamily
32. Histone-fold [47112] (1)
  core: 3 helices; long middle helix is flanked at each end with shorter ones
  1. Histone-fold [47113] (4)
    uperfamily
33. Open three-helical up-and-down bundle [47143] (7)
  core: 3 helices; bundle, open
  1. HSC20 (HSCB), C-terminal oligomerisation domain [47144] (1)
    uperfamily
  2. Diol dehydratase, gamma subunit [47148] (1)
    contains irregular N-terminal subdomain
    uperfamily
  3. Methane monooxygenase hydrolase, gamma subunit [47152] (1)
    duplication: consists of two domains of this fold
    uperfamily
  4. Mitochondrial import receptor subunit Tom20 [47157] (1)
    uperfamily
  5. Hemolysin expression modulating protein HHA [68989] (1)
    uperfamily
  6. EF2458-like [140404] (1)
    N-terminal helix swapped dimer; interrupted antiparallel coiled coil
    uperfamily
  7. YvfG-like [158388] (1)
34. beta-catenin-interacting protein ICAT [81729] (1)
  core: 3 helices; irregular array
  1. beta-catenin-interacting protein ICAT [81730] (1)
    uperfamily
35. DNA polymerase III theta subunit-like [116730] (1)
  3 helices; irregular array
  1. DNA polymerase III theta subunit-like [46575] (1)
    uperfamily
36. Four-helical up-and-down bundle [47161] (28)
  core: 4 helices; bundle, closed or partly opened, left-handed twist; up-and-down
  1. Apolipoprotein [47162] (1)
    uperfamily
  2. Aspartate receptor, ligand-binding domain [47170] (1)
    uperfamily
  3. Cytochromes [47175] (2)
    Heme-containing proteins
    uperfamily
  4. Hemerythrin-like [47188] (1)
    uperfamily
  5. TMV-like viral coat proteins [47195] (1)
    uperfamily
  6. FKBP12-rapamycin-binding domain of FKBP-rapamycin-associated protein (FRAP) [47212] (1)
    uperfamily
  7. Proteasome activator [47216] (1)
    uperfamily
  8. alpha-catenin/vinculin-like [47220] (2)
    uperfamily
  9. FAT domain of focal adhesion kinase [68993] (1)
    uperfamily
  10. Oxygen-evolving enhancer protein 3, [101112] (1)
    uperfamily
  11. Histidine-containing phosphotransfer domain, HPT domain [47226] (6)
    contains additional, fifth helix at the N-terminus
    uperfamily
  12. Bacterial GAP domain [47233] (1)
    contains extra helices in the loops at one end of the bundle
    uperfamily
  13. Outer surface protein C (OspC) [63515] (1)
    uperfamily
  14. Flagellar export chaperone FliS [101116] (1)
    can form closed, open and helix-swapped bundles
    uperfamily
  15. Domain of the SRP/SRP receptor G-proteins [47364] (1)
    uperfamily
  16. FAD-dependent thiol oxidase [69000] (1)
    uperfamily
  17. Group V grass pollen allergen [81736] (1)
    uperfamily
  18. Nucleotidyltransferase substrate binding subunit/domain [81593] (4)
    uperfamily
  19. RecG, N-terminal domain [69008] (1)
    uperfamily
  20. Colicin D immunity protein [101125] (1)
    uperfamily
  21. Nickel-containing superoxide dismutase, NiSOD [109770] (1)
    uperfamily
  22. Mannose-6-phosphate receptor binding protein 1 (Tip47), C-terminal domain [109775] (1)
    contains extra alpha+beta subdomain formed by the N- and C-termini.
    uperfamily
  23. Domain from hypothetical 2610208m17rik protein [109779] (1)
    uperfamily
  24. TrmE connector domain [116878] (1)
    uperfamily
  25. YppE-like [140415] (1)
    flattened bundle at one end with helices 2 and coming in contact and separating helices 1 and 3
    uperfamily
  26. MW0975(SA0943)-like [140423] (1)
    open bundle; there is a long groove between helices 1 and 4
    uperfamily
  27. VPS28 C-terminal domain-like [140427] (1)
    uperfamily
  28. TM1646-like [158397] (1)
37. PTS-regulatory domain, PRD [63519] (1)
  core: 4 helices; bundle, closed, right-handed twist; 1 crossover connection
  1. PTS-regulatory domain, PRD [63520] (1)
    duplication: consists of two domains of this fold
    uperfamily
38. Ferritin-like [47239] (6)
  core: 4 helices; bundle, closed, left-handed twist; 1 crossover connection
  1. Ferritin-like [47240] (9)
    contains bimetal-ion centre in the middle of the bundle
    uperfamily
  2. Cobalamin adenosyltransferase-like [89028] (2)
    crossover loop goes across a different side of the 4-helical bundle; no internal metal-binding site
    uperfamily
  3. EsxAB dimer-like [140453] (1)
    (hetero)dimer of alpha-hairpin subunits similar to that of the half-ferritin family; no bound metals
    uperfamily
  4. PE/PPE dimer-like [140459] (2)
    (hetero)dimer of alpha-hairpin subunits similar to that of the half-ferritin family; no bound metals inside the bundle
    uperfamily
  5. HP0062-like [158414] (1)
    (homo)dimer of alpha-hairpin subunits similar to that of the half-ferritin family; no bound metals
  6. SO2669-like [158418] (1)
    (homo)dimer of alpha-hairpin subunits similar to that of the half-ferritin family; no bound metals
39. 4-helical cytokines [47265] (1)
  core: 4 helices; bundle, closed; left-handed twist; 2 crossover connections
  1. 4-helical cytokines [47266] (3)
    there are two different topoisomers of this fold with different entanglements of the two crossover connections
    uperfamily
40. Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases [47322] (1)
  core: 4 helices; bundle; one loop crosses over one side of the bundle
  1. Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases [47323] (1)
    uperfamily
41. Acyl carrier protein-like [47335] (3)
  4 helices, bundle; helix 3 is shorter than others; up-and-down
  1. ACP-like [47336] (3)
    uperfamily
  2. Colicin E immunity proteins [47345] (1)
    uperfamily
  3. Retrovirus capsid dimerization domain-like [47353] (2)
    uperfamily
42. Bromodomain-like [47363] (15)
  4 helices; bundle; minor mirror variant of up-and-down topology
  1. Bromodomain [47370] (1)
    uperfamily
  2. alpha-ketoacid dehydrogenase kinase, N-terminal domain [69012] (1)
    uperfamily
  3. Acyl-CoA dehydrogenase C-terminal domain-like [47203] (2)
    multidomain flavoprotein; N-terminal domain is all-alpha; the middle domain is open (5,8) barrel
    uperfamily
  4. Plant invertase/pectin methylesterase inhibitor [101148] (1)
    contains a short alpha-hairpin at the N-terminal extension
    uperfamily
  5. Mob1/phocein [101152] (1)
    common fold is elaborated with additional short helices; contains a zinc-binding site
    uperfamily
  6. Bacteriocin immunity protein-like [109797] (2)
    uperfamily
  7. LemA-like [140478] (1)
    helices 2 and 3 are shorther than helices 1 and 4
    uperfamily
  8. MAST3 pre-PK domain-like [140482] (1)
    this domain precedes the Protein Kinase domain in Microtubule-associated serine/threonine-protein kinase 3 (MAST3)
    uperfamily
  9. PA2201 N-terminal domain-like [140486] (1)
    uperfamily
  10. Nqo1C-terminal domain-like [140490] (1)
    contains extra C-terminal helix that caps the bundle at one end and Fe4-S4 cluster at the other end
    uperfamily
  11. Bacillus cereus metalloprotein-like [158430] (1)
    Duplication: tandem repeat of two domains of this fold with similar sequences; binds a dimetal ion cluster between the repeats
  12. Ta0600-like [158436] (1)
  13. DsbB-like [158442] (1)
    contains an extra helix in a long loop between helices 3 and 4
  14. IVS-encoded protein-like [158446] (1)
    IVS: Intervening sequence with conserved ORF in eubacterial 23S rRNA genes; forms a homopentamer with a toroid-shaped structure containing a tapered central channel
  15. YqcC-like [158452] (1)
43. ROP-like [47379] (8)
  4 helices; dimer of identical alpha-hairpin subunits; bundle, closed, left-handed twist
  1. ROP protein [47380] (1)
    uperfamily
  2. Homodimeric domain of signal transducing histidine kinase [47384] (1)
    uperfamily
  3. Nonstructural protein ns2, Nep, M1-binding domain [101156] (1)
    uperfamily
  4. Dimerisation domain of CENP-B [101160] (1)
    uperfamily
  5. Hypothetical protein D-63 [109801] (1)
    uperfamily
  6. HP1531-like [140496] (1)
    contains short extra helix in the loop between the two bundle-forming helices
    uperfamily
  7. BAS1536-like [140500] (1)
    uperfamily
  8. FHV B2 protein-like [140506] (1)
    uperfamily
44. Dimerization-anchoring domain of cAMP-dependent PK regulatory subunit [47390] (1)
  4 helices; bundle, closed, right-handed twist
  1. Dimerization-anchoring domain of cAMP-dependent PK regulatory subunit [47391] (1)
    dimer of identical alpha-hairpin motifs
    uperfamily
45. Orange domain-like [158456] (1)
  4 helices; dimer of identical alpha-hairpin subunits;
  1. Orange domain-like [158457] (1)
46. Soluble domain of poliovirus core protein 3a [89042] (1)
  4 helices; bundle, closed, right-handed twist
  1. Soluble domain of poliovirus core protein 3a [89043] (1)
    dimer of identical alpha-hairpin motifs
    uperfamily
47. Transcription factor IIA (TFIIA), alpha-helical domain [47395] (1)
  4 helices; bundle, closed, right-handed twist
  1. Transcription factor IIA (TFIIA), alpha-helical domain [47396] (1)
    dimer of non-identical alpha-hairpins
    uperfamily
48. Ectatomin subunits [47400] (1)
  4 helices; bundle, closed, left-handed twist
  1. Ectatomin subunits [47401] (1)
    disulfide-linked heterodimer of similar alpha-hairpin subunits
    uperfamily
49. Dimerisation interlock [47405] (4)
  4 helices; bundle, closed, right-handed twist
  1. SinR repressor dimerisation domain-like [47406] (1)
    intertwined heterodimer of two homologous chains
    uperfamily
  2. Dimerization cofactor of HNF-1 alpha [100957] (1)
    uperfamily
  3. Docking domain A of the erythromycin polyketide synthase (DEBS) [101166] (1)
    uperfamily
  4. Phenylalanine zipper [109805] (1)
    interlocking dimer with longer helices and aromatic-rich core
    uperfamily
50. lambda repressor-like DNA-binding domains [47412] (1)
  core: 4 helices; folded leaf, closed
  1. lambda repressor-like DNA-binding domains [47413] (13)
    uperfamily
51. Signal peptide-binding domain [47445] (1)
  4 helices; orthogonal array
  1. Signal peptide-binding domain [47446] (1)
    uperfamily
52. A DNA-binding domain in eukaryotic transcription factors [47453] (1)
  4 helices; the long C-terminal helix protrudes from the domain and binds to DNA
  1. A DNA-binding domain in eukaryotic transcription factors [47454] (1)
    uperfamily
53. HLH-like [47458] (2)
  4-helices; bundle, closed, left-handed twist; 2 crossover connections
  1. HLH, helix-loop-helix DNA-binding domain [47459] (1)
    dimer of two identical helix-loop-helix subunits
    uperfamily
  2. Docking domain B of the erythromycin polyketide synthase (DEBS) [101173] (1)
    uperfamily
54. HAMP domain-like [158471] (1)
  dimer of helix-loop-helix segments; distict from the HLH-like fold; parallel four-helical bundle with two overside connections
  1. HAMP domain-like [158472] (1)
55. EF Hand-like [47472] (4)
  core: 4 helices; array of 2 hairpins, opened
  1. EF-hand [47473] (11)
    Duplication: consists of two EF-hand units: each is made of two helices connected with calcium-binding loop
    uperfamily
  2. Insect pheromone/odorant-binding proteins [47565] (1)
    the N-terminal extension, containing a few short helices, forms a flexible lid for the binding cavity
    uperfamily
  3. Hypothetical protein MTH865 [69025] (1)
    uperfamily
  4. Cloroperoxidase [47571] (1)
    duplication: consists of 2 similar domains composed of 2 EF hand-like motifs each
    uperfamily
56. CH domain-like [47575] (3)
  core: 4 helices: bundle
  1. Calponin-homology domain, CH-domain [47576] (1)
    uperfamily
  2. X-Prolyl dipeptidyl aminopeptidase PepX, N-terminal domain [81761] (1)
    uperfamily
  3. Hook domain [116907] (1)
    uperfamily
57. Domain of poly(ADP-ribose) polymerase [47586] (1)
  core: 4 helices: bundle; unusual topology
  1. Domain of poly(ADP-ribose) polymerase [47587] (1)
    duplication: consists of 2 helix-loop-helix structural repeats
    uperfamily
58. SWIB/MDM2 domain [47591] (1)
  core: 4 helices: open bundle; capped by two small 3-stranded beta-sheets
  duplication: consists of two structural repeats
  1. SWIB/MDM2 domain [47592] (1)
    binds to the transactivation domain of human p53
    uperfamily
59. Pre-protein crosslinking domain of SecA [81766] (1)
  core: 4 helices: bundle; flanked by two short beta-hairpins
  duplication: consists of two structural repeats
  1. Pre-protein crosslinking domain of SecA [81767] (1)
    uperfamily
60. Ribbon-helix-helix [47597] (1)
  core: 4 helices; array of 2 hairpins, opened
  1. Ribbon-helix-helix [47598] (11)
    formerly Met repressor-like; dimeric proteins; the N-termini form a small beta-sheet ribbon
    uperfamily
61. GST C-terminal domain-like [47615] (1)
  core: 4 helices; bundle, closed, left-handed twist; right-handed superhelix
  1. GST C-terminal domain-like [47616] (2)
    this domains follows the thioredoxin-like N-terminal domain
    uperfamily
62. Methionine synthase domain-like [47643] (3)
  4 helices; bundle, left-handed twist; right-handed superhelix
  1. Methionine synthase domain [47644] (1)
    uperfamily
  2. Nucleoside phosphorylase/phosphoribosyltransferase N-terminal domain [47648] (1)
    uperfamily
  3. TM0693-like [140560] (1)
    helix-swapped dimer; in which the two last helices of this fold form a single coiled-coil helix
    uperfamily
63. KaiA/RbsU domain [101214] (1)
  4 helices; bundle, right-handed twist; right-handed superhelix
  1. KaiA/RbsU domain [101215] (2)
    uperfamily
64. STAT-like [47654] (6)
  4 long helices; bundle, left-handed twist (coiled coil); right-handed superhelix
  1. STAT [47655] (1)
    uperfamily
  2. t-snare proteins [47661] (1)
    uperfamily
  3. Cag-Z [109839] (1)
    four-helical bundle without significant twist
    uperfamily
  4. CAPPD, an extracellular domain of amyloid beta A4 protein [109843] (1)
    the first three helices are longer than the fourth one and, taken separately, adopt a Spectrin repeat-like fold (scop_cf 46965)
    uperfamily
  5. FlgN-like [140566] (1)
    the last helix is shorter than the three others; a short extra helix between helices 2 an 3 fills the gap in the bundle
    uperfamily
  6. MukF C-terminal domain-like [140570] (1)
    uperfamily
65. N-cbl like [47667] (5)
  4 helices; bundle, left-handed twist; left-handed superhelix
  1. N-terminal domain of cbl (N-cbl) [47668] (1)
    uperfamily
  2. Transferrin receptor-like dimerisation domain [47672] (1)
    uperfamily
  3. Conserved domain common to transcription factors TFIIS, elongin A, CRSP70 [47676] (1)
    uperfamily
  4. HIV integrase-binding domain [140576] (1)
    uperfamily
  5. PG0775 C-terminal domain-like [158494] (1)
66. Replisome organizer (g39p helicase loader/inhibitor protein) [89063] (1)
  4 helices; bundle, right-handed twist; left-handed superhelix
  1. Replisome organizer (g39p helicase loader/inhibitor protein) [89064] (1)
    uperfamily
67. Hypothetical protein YqbG [116914] (1)
  core: 4 helices; bundle, right-handed twist; left-handed superhelix
  1. Hypothetical protein YqbG [116915] (1)
    uperfamily
68. DnaD domain-like [158498] (1)
  4 helices; bundle, right-handed twist; left-handed superhelix
  1. DnaD domain-like [158499] (1)
69. C-terminal domain of B transposition protein [47680] (1)
  4 helices; irregular array
  1. C-terminal domain of B transposition protein [47681] (1)
    uperfamily
70. HAND domain of the nucleosome remodeling ATPase ISWI [101223] (1)
  4 helices; irregular array
  1. HAND domain of the nucleosome remodeling ATPase ISWI [101224] (1)
    uperfamily
71. N-terminal, cytoplasmic domain of anti-sigmaE factor RseA [89068] (1)
  4 helices; irregular array
  1. N-terminal, cytoplasmic domain of anti-sigmaE factor RseA [89069] (1)
    uperfamily
72. Anaphylotoxins (complement system) [47685] (1)
  4 helices; irregular array, disulfide-linked
  1. Anaphylotoxins (complement system) [47686] (1)
    uperfamily
73. Cytochrome c oxidase subunit h [47693] (1)
  4 helices; irregular array, disulfide-linked
  1. Cytochrome c oxidase subunit h [47694] (1)
    uperfamily
74. Crustacean CHH/MIH/GIH neurohormone [81777] (1)
  4 helices; irregular array, disulfide-linked
  1. Crustacean CHH/MIH/GIH neurohormone [81778] (1)
    uperfamily
75. C-terminal domain of DFF45/ICAD (DFF-C domain) [81782] (1)
  4 helices; folded leaf; right-handed superhelix
  1. C-terminal domain of DFF45/ICAD (DFF-C domain) [81783] (1)
    uperfamily
76. BH2638-like [158503] (1)
  4 helices, folded leaf, right-handed superhelix; some similarity to the DFF-C domain fold (scop_cf 81782)
  1. BH2638-like [158504] (1)
77. Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin [47698] (1)
  4 helices; folded leaf; right-handed superhelix
  1. Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin [47699] (3)
    can be classified as disulfide-rich
    uperfamily
78. p53 tetramerization domain [47718] (1)
  core: 4 helices; bundle
  1. p53 tetramerization domain [47719] (1)
    homotetramer
    uperfamily
79. Bcr-Abl oncoprotein oligomerization domain [69035] (1)
  core: 4 long helices; bundle
  1. Bcr-Abl oncoprotein oligomerization domain [69036] (1)
    homotetramer
    uperfamily
80. Domain of early E2A DNA-binding protein, ADDBP [47723] (1)
  4 helices; bundle, partly opened
  1. Domain of early E2A DNA-binding protein, ADDBP [47724] (1)
    this domain is the first in the fragment of known structure
    uperfamily
81. IHF-like DNA-binding proteins [47728] (1)
  core: 4 helices; bundle, partly opened, capped with a beta-sheet
  1. IHF-like DNA-binding proteins [47729] (2)
    dimer of identical subunits
    uperfamily
82. TraM-like [140580] (1)
  multihelical oligomeric protein; structure of whole subunit is not known; the N-terminal part is implicated in DNA binding, the middle region forms tetrameric parallel coiled coil, surrounded by the C-terminal helices
  1. TraM-like [140581] (1)
    uperfamily
83. CO dehydrogenase ISP C-domain like [47740] (1)
  core: 4 helices, bundle
  1. CO dehydrogenase ISP C-domain like [47741] (1)
    contains 2Fe-2S cluster
    uperfamily
84. Protein HNS-dependent expression A; HdeA [47751] (1)
  4 helices; the three last helices form a bundle similar to that of the RuvA C-domain
  1. Protein HNS-dependent expression A; HdeA [47752] (1)
    overall fold is similar to the fold of N-terminal subdomain of the GluRS anticodon-binding domain (1GLN)
    uperfamily
85. PABP domain-like [63569] (2)
  4 helices; an orthogonal array
  1. PABC (PABP) domain [63570] (1)
    uperfamily
  2. Ribosomal protein L20 [74731] (1)
    uperfamily
86. Chemotaxis receptor methyltransferase CheR, N-terminal domain [47756] (1)
  4 helices; an orthogonal array
  1. Chemotaxis receptor methyltransferase CheR, N-terminal domain [47757] (1)
    uperfamily
87. Dcp2 domain-like [140585] (1)
  4 helices; orthogonal array of two alpha hairpins
  1. Dcp2 domain-like [140586] (1)
    uperfamily
88. Type III secretion system domain [140590] (1)
  core: 4 helices, orthogonal array; right-handed superhelix
  1. Type III secretion system domain [140591] (3)
    uperfamily
89. YugE-like [116921] (1)
  4-helices; bundle; right-handed twist
  1. YugE-like [116922] (1)
    uperfamily
90. PWI domain [101232] (1)
  4 helices; up-and-down bundle; topological similarity to the bromodomain-like and SAM domain-like folds
  1. PWI domain [101233] (1)
    uperfamily
91. PAH2 domain [47761] (1)
  4 helices; open up-and-down bundle; binds alpha-helical peptides
  1. PAH2 domain [47762] (1)
    uperfamily
92. Myosin phosphatase inhibitor 17kDa protein, CPI-17 [81789] (1)
  4 helices; open up-and-down bundle; flexible N-terminal tail
  1. Myosin phosphatase inhibitor 17kDa protein, CPI-17 [81790] (1)
    uperfamily
93. XPC-binding domain [101237] (1)
  4 helices; array
  1. XPC-binding domain [101238] (1)
    uperfamily
94. DinB/YfiT-like putative metalloenzymes [109853] (1)
  core: 4 helices; bundle, closed, left-handed twist; an unusual topology with a higher contact order
  1. DinB/YfiT-like putative metalloenzymes [109854] (4)
    contains metal-binding site on the bundle surface surrounded by loops
    uperfamily
95. EspA/CesA-like [116926] (1)
  4 helices; bundle, closed, left ight-handed twist; interlocked (hetero)dimer of 2-helical subunits
  1. EspA/CesA-like [116927] (2)
    secreted protein and its chaperone both adopt similar substructures in the heterodimer
    uperfamily
96. NblA-like [109858] (1)
  4 helices; dimer of identical alpha-hairpin subunits; open bundle
  1. NblA-like [109859] (1)
    uperfamily
97. EF2947-like [140606] (1)
  4 helices; "diamond" array; duplication: N-terminal and C-terminal pairs of helices are related by pseudo dyad
  1. EF2947-like [140607] (1)
    uperfamily
98. EB1 dimerisation domain-like [140611] (1)
  dimeric 4-helical bundle with a coiled coil at one end formed by the longer N-terminal helices
  1. EB1 dimerisation domain-like [140612] (1)
    uperfamily
99. SAM domain-like [47768] (16)
  4-5 helices; bundle of two orthogonally packed alpha-hairpins; involved in the interactions with DNA and proteins
  1. SAM/Pointed domain [47769] (3)
    uperfamily
  2. RuvA domain 2-like [47781] (7)
    duplication: contains two helix-hairpin-helix (HhH) motifs
    uperfamily
  3. C-terminal domain of RNA polymerase alpha subunit [47789] (1)
    contains one classic and one pseudo HhH motifs
    uperfamily
  4. Rad51 N-terminal domain-like [47794] (3)
    contains one classic and one pseudo HhH motifs
    uperfamily
  5. Barrier-to-autointegration factor, BAF [47798] (1)
    contains one classic and one pseudo HhH motifs
    uperfamily
  6. DNA polymerase beta, N-terminal domain-like [47802] (1)
    contains one classic and one pseudo HhH motifs
    uperfamily
  7. PsbU/PolX domain-like [81585] (2)
    contains one classic and one pseudo HhH motifs
    uperfamily
  8. 5' to 3' exonuclease, C-terminal subdomain [47807] (1)
    uperfamily
  9. HRDC-like [47819] (4)
    uperfamily
  10. lambda integrase-like, N-terminal domain [47823] (1)
    uperfamily
  11. Enzyme I of the PEP:sugar phosphotransferase system HPr-binding (sub)domain [47831] (1)
    uperfamily
  12. Hypothetical protein YjbJ [69047] (1)
    uperfamily
  13. Putative methyltransferase TM0872, insert domain [81799] (1)
    uperfamily
  14. eIF2alpha middle domain-like [116742] (1)
    uperfamily
  15. YozE-like [140652] (1)
    uperfamily
  16. GspK insert domain-like [158544] (1)
    tandem repeat of two SAM-like domains iserted into pilin fold; domain 1 contains one classic HhH motif
100. Retroviral matrix proteins [47835] (1)
  4-5 helices; right-handed superhelix
  1. Retroviral matrix proteins [47836] (6)
    the 5th, C-terminal helix is missing in some of the member structures
    uperfamily
101. Flavivirus capsid protein C [101256] (1)
  core: 5 helices; right-handed superhelix; swapped dimer with the two long C-terminal helices
  1. Flavivirus capsid protein C [101257] (1)
    uperfamily
102. Hepatitis B viral capsid (hbcag) [47851] (1)
  5 helices; array; two long helices form a hairpin that dimerizes into a 4-helical bundle
  1. Hepatitis B viral capsid (hbcag) [47852] (1)
    uperfamily
103. Apolipophorin-III [47856] (1)
  5 helices; bundle, closed, left-handed twist
  1. Apolipophorin-III [47857] (1)
    uperfamily
104. Methenyltetrahydrofolate cyclohydrolase-like [101261] (1)
  5 helices; bundle, closed, left-handed twist
  1. Methenyltetrahydrofolate cyclohydrolase-like [101262] (1)
    uperfamily
105. A middle domain of Talin 1 [109879] (1)
  5 helices; bundle, closed, left-handed twist; helices 2-5 adopt the Four-helical up-and-down bundle fold (scop_cf 47161)
  1. A middle domain of Talin 1 [109880] (1)
    uperfamily
106. I/LWEQ domain [109884] (1)
  5 helices; bundle, closed, left-handed twist
  1. I/LWEQ domain [109885] (1)
    uperfamily
107. RNA-binding protein She2p [116941] (1)
  5 helices; bundle, closed, left-handed twist; topological similarity to the middle domain of the L-aspartase-like fold (scop_cf 48556)
  1. RNA-binding protein She2p [116942] (1)
    uperfamily
108. Hyaluronidase domain-like [140656] (3)
  5 helices; bundle, closed, left-handed twist; up-and-down (meander) topology
  1. Hyaluronidase post-catalytic domain-like [140657] (1)
    uperfamily
  2. TTHA0068-like [140663] (1)
    uperfamily
  3. FLJ32549 domain-like [158548] (1)
109. YoaC-like [140669] (1)
  5 helices; bundle, one crossover connection, the arrangement of the first four helices is similar to the KaiA/RbsU domain fold (scop_cf 101214)
  1. YoaC-like [140670] (1)
    uperfamily
110. Saposin-like [47861] (2)
  5 helices; folded leaf, closed
  1. Saposin [47862] (4)
    Lipid-binding can promote conformational changes and oligomerisation in some members
    uperfamily
  2. Bacteriocin AS-48 [47869] (1)
    uperfamily
111. Annexin [47873] (1)
  5 helices; folded leaf, closed
  1. Annexin [47874] (1)
    duplication: consists of four domains of the same fold
    uperfamily
112. TAFH domain-like [158552] (1)
  5 helices; folded leaf, closed
  1. TAFH domain-like [158553] (1)
113. Transducin (alpha subunit), insertion domain [47894] (1)
  5 helices; folded leaf
  1. Transducin (alpha subunit), insertion domain [47895] (1)
    this domain interrupts the G-protein common fold
    uperfamily
114. Wiscott-Aldrich syndrome protein, WASP, C-terminal domain [47911] (1)
  5 helices; irregular array; left-handed superhelix
  1. Wiscott-Aldrich syndrome protein, WASP, C-terminal domain [47912] (1)
    uperfamily
115. Left-handed superhelix [47916] (4)
  core: 4-5 helices; bundle; left-handed superhelix
  1. C-terminal domain of alpha and beta subunits of F1 ATP synthase [47917] (1)
    uperfamily
  2. Ypt/Rab-GAP domain of gyp1p [47923] (1)
    uperfamily
  3. 1-deoxy-D-xylulose-5-phosphate reductoisomerase, C-terminal domain [69055] (1)
    uperfamily
  4. BH3980-like [158560] (1)
116. ATPD N-terminal domain-like [47927] (2)
  core: 5 helices; bundle
  1. N-terminal domain of the delta subunit of the F1F0-ATP synthase [47928] (1)
    uperfamily
  2. AF1862-like [158568] (1)
    probable biological unit is a hexamer
117. ERP29 C domain-like [47932] (2)
  5 helices; bundle
  1. ERP29 C domain-like [47933] (1)
    uperfamily
  2. Helical domain of Sec23/24 [81811] (1)
    uperfamily
118. Functional domain of the splicing factor Prp18 [47937] (1)
  core: 5 helices; bundle
  1. Functional domain of the splicing factor Prp18 [47938] (1)
    uperfamily
119. Retrovirus capsid protein, N-terminal core domain [47942] (1)
  core: 5 helices; bundle
  1. Retrovirus capsid protein, N-terminal core domain [47943] (1)
    uperfamily
120. GINS helical bundle-like [158572] (1)
  5 helices, staggered bundle;
  1. GINS helical bundle-like [158573] (4)
    common to all subunits of the GINS complex
121. Jann4075-like [158586] (1)
  core: 5 helices; the C-terminal helix is surrounded by the others; similarity to some EF-hand domains
  1. Jann4075-like [158587] (1)
122. Cyclin-like [47953] (1)
  core: 5 helices; one helix is surrounded by the others
  1. Cyclin-like [47954] (3)
    duplication: consists of two domains of this fold
    uperfamily
123. Arp2/3 complex 21 kDa subunit ARPC3 [69059] (1)
  5 helices; one helix is surrounded by the others
  1. Arp2/3 complex 21 kDa subunit ARPC3 [69060] (1)
    uperfamily
124. RNase III domain-like [69064] (1)
  core: 5 helices; one helix is surrounded by the others
  1. RNase III domain-like [69065] (2)
    uperfamily
125. Ribosomal protein S7 [47972] (1)
  core: 5 helices; contains one more helix and a beta-hairpin outside the core
  1. Ribosomal protein S7 [47973] (1)
    uperfamily
126. post-AAA+ oligomerization domain-like [48018] (1)
  core: 5 helices: bundle
  1. post-AAA+ oligomerization domain-like [48019] (2)
    associated with N-terminal domain from the AAA+ family of P-loop hydrolases
    uperfamily
127. PAP/OAS1 substrate-binding domain [81632] (1)
  core: 5-helical bundle; up-and-down; right-handed twist
  1. PAP/OAS1 substrate-binding domain [81631] (5)
    this domain follows the catalytic nucleotidyltransferase domain
    uperfamily
128. Anti-sigma factor AsiA [69069] (1)
  core: 5 helices: orthogonal array
  1. Anti-sigma factor AsiA [69070] (1)
    uperfamily
129. Antibiotic binding domain of TipA-like multidrug resistance regulators [89081] (1)
  5 helices: orthogonal array
  1. Antibiotic binding domain of TipA-like multidrug resistance regulators [89082] (1)
    uperfamily
130. Surp module (SWAP domain) [109904] (1)
  5 helices: irregular array
  1. Surp module (SWAP domain) [109905] (1)
    uperfamily
131. YgfY-like [109909] (1)
  5 helices; array; forms a tight dimer in crystals
  1. YgfY-like [109910] (1)
    uperfamily
132. Hypothetical protein YhaI [109914] (1)
  core: 5 helices; orthogonal array; folding similarity to the TipA-S domain (1ny9)
  1. Hypothetical protein YhaI [109915] (1)
    oligomerizes via extra N-terminal helix forming trimeric coil-coiled
    uperfamily
133. Hypothetical protein At3g22680 [109919] (1)
  5 helices; array; probable biological unit is a homodimer
  1. Hypothetical protein At3g22680 [109920] (1)
    uperfamily
134. SP0561-like [140682] (1)
  5 helices; array; includes extra N-terminal and C-terminal short strands forming parrallel beta-sheet ladder
  1. SP0561-like [140683] (1)
    uperfamily
135. RbcX-like [158614] (1)
  5 helices per subunit; irregular array of short and long helices; swapping of the C-terminal helices in the dimer
  1. RbcX-like [158615] (1)
136. YheA-like [158621] (1)
  5 helices; "kinked" antiparallel coiled coil; forms flexible oligomeric assemblies via two different dimerisation interfaces
  1. YheA/YmcA-like [158622] (2)
137. RPA2825-like [158633] (1)
  5 helices, array; long flexible loop between helices 1 and 2; the remaining helices are arranged similar to the PGBD-like fold (scop_cf 47089)
  1. RPA2825-like [158634] (1)
138. ENT-like [158638] (1)
  5 helices, irregular array, right-handed superhelix
  1. ENT-like [158639] (1)
139. YfmB-like [140687] (1)
  5 helices, array; buried N-terminal helix; some topological similarity (circular permutation?) to the Nucleotidyltransferase substrate binding subunit/domain (scop_sf 81593)
  1. YfmB-like [140688] (1)
    uperfamily
140. N-terminal domain of adenylylcyclase associated protein, CAP [101277] (1)
  6 helices: bundle; left-handed twist, up-and-down topology
  1. N-terminal domain of adenylylcyclase associated protein, CAP [101278] (1)
    uperfamily
141. IpaD-like [140692] (1)
  6 helices; bundle, up-and-down; can be divided into two four-helical bundles sharing two helices (3 and 6), which are twice longer than the rest
  1. IpaD-like [140693] (1)
    uperfamily
142. Iron-dependent repressor protein, dimerization domain [47978] (1)
  6 helices, homodimer of 3-helical domains
  1. Iron-dependent repressor protein, dimerization domain [47979] (1)
    uperfamily
143. Glutamyl tRNA-reductase dimerization domain [69074] (1)
  6 helices, homodimer of 3-helical domains
  1. Glutamyl tRNA-reductase dimerization domain [69075] (1)
    uperfamily
144. GRIP domain [101282] (1)
  6 helices, homodimer of 3-helical domains
  1. GRIP domain [101283] (1)
    uperfamily
145. BAR/IMD domain-like [116747] (1)
  6 helices, homodimer of 3-helical domains
  1. BAR/IMD domain-like [103657] (4)
    core: dimeric six-helical bundle; protuding long helices form aniparallel coiled coils at both bundle ends
    uperfamily
146. L27 domain [101287] (1)
  6 helices, heterodimer of 3-helical domains
  1. L27 domain [101288] (1)
    uperfamily
147. Lissencephaly-1 protein (Lis-1, PAF-AH alpha) N-terminal domain [109924] (1)
  dimer of 3-helical segments; consists of two subdomains: 4-helical bundle and coiled coil
  1. Lissencephaly-1 protein (Lis-1, PAF-AH alpha) N-terminal domain [109925] (1)
    uperfamily
148. Phage replication organizer domain [140712] (1)
  6 helices, homodimer of 3-helical domains
  1. Phage replication organizer domain [140713] (1)
    DNA binding induces further oligomerization
    uperfamily
149. YejL-like [158650] (1)
  6 helices; intertwined homodimer of three-helical subunits, bundle
  1. YejL-like [158651] (1)
150. Mediator hinge subcomplex-like [140717] (1)
  6 helices; heterodimer of structurally similar subunits; the N-terminal hairpins form a four-helical bundle, whereas the C-terminal helices form coiled coil structure
  1. Mediator hinge subcomplex-like [140718] (2)
    uperfamily
151. DEATH domain [47985] (1)
  6 helices: closed bundle; greek-key; internal pseudo twofold symmetry
  1. DEATH domain [47986] (4)
    uperfamily
152. GntR ligand-binding domain-like [48007] (1)
  core: 6 helices: closed bundle; greek-key; internal pseudo twofold symmetry
  1. GntR ligand-binding domain-like [48008] (1)
    uperfamily
153. AF0941-like [140725] (1)
  6 helices, arranged into two interconnected 3-helical bundles; can also be described as a 'kinked' four-helical bundle; right-handed superhelix
  1. AF0941-like [140726] (1)
    uperfamily
154. NusB-like [48012] (1)
  6 helices: bundle; one central helix is surrounded by 5 others
  1. NusB-like [48013] (3)
    uperfamily
155. YutG-like [101306] (1)
  core: 6 helices; bundle; one central helix is surrounded by 5 others
  1. YutG-like [101307] (1)
    uperfamily
156. N-terminal domain of DnaB helicase [48023] (1)
  6 helices: array
  1. N-terminal domain of DnaB helicase [48024] (1)
    uperfamily
157. Invasion protein A (SipA) , C-terminal actin binding domain [101311] (1)
  6 helices: orthogonal array
  1. Invasion protein A (SipA) , C-terminal actin binding domain [101312] (1)
    uperfamily
158. MtlR-like [158667] (1)
  multihelical; 8-helical up-and-down bundle
  1. MtlR-like [158668] (1)
159. Guanido kinase N-terminal domain [48033] (1)
  irregular array of 6 short helices
  1. Guanido kinase N-terminal domain [48034] (1)
    uperfamily
160. Scaffolding protein gpD of bacteriophage procapsid [48044] (1)
  core: 6 helices; one central helix is surrounded by 5 others
  1. Scaffolding protein gpD of bacteriophage procapsid [48045] (1)
    uperfamily
161. Hemocyanin, N-terminal domain [48049] (1)
  6 helices; bundle; one central helix is surrounded by 5 others
  1. Hemocyanin, N-terminal domain [48050] (1)
    uperfamily
162. Sama2622-like [158674] (1)
  core: 6 helices; bundle; one central helix is surrounded by 5 others
  1. Sama2622-like [158675] (1)
163. Di-copper centre-containing domain [48055] (1)
  multihelical
  1. Di-copper centre-containing domain [48056] (2)
    duplication: contains two structural repeats
    uperfamily
164. DBL homology domain (DH-domain) [48064] (1)
  multihelical; core: 5-helical bundle
  1. DBL homology domain (DH-domain) [48065] (1)
    uperfamily
165. LigA subunit of an aromatic-ring-opening dioxygenase LigAB [48075] (1)
  multihelical; contains compact array of 6 short helices
  1. LigA subunit of an aromatic-ring-opening dioxygenase LigAB [48076] (1)
    uperfamily
166. RuBisCo LSMT C-terminal, substrate-binding domain [81821] (1)
  multihelical; irregular array of long and short helices
  1. RuBisCo LSMT C-terminal, substrate-binding domain [81822] (1)
    uperfamily
167. Methyl-coenzyme M reductase alpha and beta chain C-terminal domain [48080] (1)
  multihelical bundle; contains buried central helix
  1. Methyl-coenzyme M reductase alpha and beta chain C-terminal domain [48081] (1)
    uperfamily
168. YcfC-like [101321] (1)
  multihelical; contains two buried central helices
  1. YcfC-like [101322] (1)
    uperfamily
169. PA2201 C-terminal domain-like [140730] (1)
  multihelical; seven-helical bundle with buried central helix
  1. PA2201 C-terminal domain-like [140731] (1)
    uperfamily
170. Rv1873-like [140735] (1)
  multihelical; contains unusually short buried central helix
  1. Rv1873-like [140736] (1)
    uperfamily
171. RUN domain-like [140740] (1)
  multihelical; 3-helical bundle similar to one half of the DEATH domain fold is flanked by two alpha-hairpins forming a four-helical bundle; the axes of the three-helical and four-helical bundles are aproximately orthogonal to each other
  1. RUN domain-like [140741] (1)
    uperfamily
172. SipA N-terminal domain-like [140745] (1)
  multihelical; bundle; the last helix is buried inside the bundle
  1. SipA N-terminal domain-like [140746] (1)
    uperfamily
173. Transcription factor STAT-4 N-domain [48091] (1)
  multihelical; can be divided into two subdomains
  1. Transcription factor STAT-4 N-domain [48092] (1)
    uperfamily
174. TerB-like [158681] (1)
  multihelical; contains two central helices; duplication: there are two three-helical repeats related by pseudo twofold symmetry
  1. TerB-like [158682] (2)
    members of this superfamily probably related to the tellurite resistance protein TerB (Pfam 05099) of yet undetermined structure
175. Regulator of G-protein signaling, RGS [48096] (1)
  multihelical; consists of two all-alpha subdomains
  contains a 4-helical bundle with left-handed twist and up-and-down topology
  1. Regulator of G-protein signaling, RGS [48097] (1)
    uperfamily
176. SopE-like GEF domain [81831] (1)
  multihelical; consists of two all-alpha subdomains each containing a 3-helical bundle with right-handed twist
  1. SopE-like GEF domain [81832] (1)
    uperfamily
177. Variable surface antigen VlsE [74747] (1)
  multihelical; consists of two all-alpha subdomains; contains a 4-helical bundle with left-handed twist and up-and-down topology
  1. Variable surface antigen VlsE [74748] (1)
    uperfamily
178. YgfB-like [101326] (1)
  multihelical; consists of two tightly associated 3-helical bundles with different twists
  1. YgfB-like [101327] (1)
    uperfamily
179. Hypothetical protein MTH393 [101331] (1)
  multihelical; consists of two all-alpha subdomains; dimer
  1. Hypothetical protein MTH393 [101332] (1)
    uperfamily
180. PG0816-like [140752] (1)
  multihelical; comprises two helical bundles, both are topologically similar to the RuvA C-terminal domain-like fold (scop_cf 46928)
  1. PG0816-like [140753] (1)
    uperfamily
181. UraD-like [158693] (1)
  multihelical; irregular array of long and short helices
  1. UraD-Like [158694] (1)
182. Sec63 N-terminal domain-like [158701] (1)
  multihelical; consists of two helical subdomains
  1. Sec63 N-terminal domain-like [158702] (2)
183. Carbamoyl phosphate synthetase, large subunit connection domain [48107] (1)
  multihelical; consists of two all-alpha subdomains
  possible duplication: subdomains have similar topologies
  1. Carbamoyl phosphate synthetase, large subunit connection domain [48108] (1)
    uperfamily
184. Heme-dependent peroxidases [48112] (1)
  multihelical; consists of two all-alpha domains
  1. Heme-dependent peroxidases [48113] (3)
    uperfamily
185. Ribosomal protein L19 (L19e) [48139] (1)
  multihelical; consists of two different 3-helical domains connected by a long, partly helical linker
  1. Ribosomal protein L19 (L19e) [48140] (1)
    uperfamily
186. PSPTO4464-like [158709] (1)
  multihelical; consists of two subdomains at the ends of a long connecting helix
  1. PSPTO4464-like [158710] (1)
187. GatB/YqeY motif [89094] (1)
  multihelical; consists of two different alpha-helical bundles (4-helical and 3-helical)
  1. GatB/YqeY motif [89095] (2)
    uperfamily
188. YfbU-like [116959] (1)
  multihelical; consist of two subdomains; forms 24-mer with the N-terminal sudbomains packing around the 4-fold axis and the C-terminal domains interacting at the 2-fold and 3-fold axes
  1. YfbU-like [116960] (1)
    uperfamily
189. MG296-like [158714] (1)
  multihelical; in crystal forms helical polymers by swapping the two N-terminal helices to the next subunit in polymer; three subunits per turn of polymer helix
  1. MG296-like [158715] (1)
190. Hypothetical protein MPN330 [116964] (1)
  multihelical; consists of three different 4-helical bundles
  1. Hypothetical protein MPN330 [116965] (1)
    uperfamily
191. HD-domain/PDEase-like [109603] (1)
  multihelical; consists of two different alpha-helical bundles
  1. HD-domain/PDEase-like [109604] (5)
    uperfamily
192. Superantigen MAM [101343] (1)
  multihelical; consists of two different alpha-helical bundles
  1. Superantigen MAM [101344] (1)
    uperfamily
193. Influenza virus matrix protein M1 [48144] (1)
  multihelical; consists of two different all-alpha subdomains, 4 helices each
  1. Influenza virus matrix protein M1 [48145] (1)
    superficially similar to membrane translocation domains
    uperfamily
194. DNA-glycosylase [48149] (1)
  multihelical; consists of two all-alpha domains
  1. DNA-glycosylase [48150] (6)
    uperfamily
195. An anticodon-binding domain of class I aminoacyl-tRNA synthetases [48162] (1)
  multihelical; consists of two all-alpha domains
  1. An anticodon-binding domain of class I aminoacyl-tRNA synthetases [48163] (2)
    uperfamily
196. Putative anticodon-binding domain of alanyl-tRNA synthetase (AlaRS) [101352] (1)
  multihelical; consists of two all-alpha subdomains
  1. Putative anticodon-binding domain of alanyl-tRNA synthetase (AlaRS) [101353] (1)
    uperfamily
197. R1 subunit of ribonucleotide reductase, N-terminal domain [48167] (1)
  multihelical consists of two all-alpha subdomains
  subdomain 1 (residues 10-100) is a 4-helical bundle
  1. R1 subunit of ribonucleotide reductase, N-terminal domain [48168] (1)
    uperfamily
198. BEACH domain [81836] (1)
  multihelical, complex architecture
  1. BEACH domain [81837] (1)
    uperfamily
199. Cryptochrome/photolyase FAD-binding domain [48172] (1)
  multihelical; consists of two all-alpha subdomains
  1. Cryptochrome/photolyase FAD-binding domain [48173] (1)
    uperfamily
200. 6-phosphogluconate dehydrogenase C-terminal domain-like [48178] (1)
  multihelical; common core is formed around two long antiparallel helices related by (pseudo) twofold symmetry
  1. 6-phosphogluconate dehydrogenase C-terminal domain-like [48179] (12)
    N-terminal domain is Rossmann-fold with a family-specific C-terminal extension
    uperfamily
201. Uteroglobin-like [48200] (1)
  multihelical
  1. Uteroglobin-like [48201] (1)
    disulfide-linked dimer of two identical chains, 4 helices in each
    uperfamily
202. alpha/alpha toroid [48207] (6)
  multihelical; up to seven alpha-hairpins are arranged in closed circular array; there may be sequence similarities between different superfamilies
  1. Six-hairpin glycosidases [48208] (9)
    uperfamily
  2. Seven-hairpin glycosidases [48225] (1)
    uperfamily
  3. Chondroitin AC/alginate lyase [48230] (2)
    incomplete toroid
    uperfamily
  4. Family 10 polysaccharide lyase [81853] (1)
    uperfamily
  5. Terpenoid cyclases/Protein prenyltransferases [48239] (4)
    uperfamily
  6. LanC-like [158745] (1)
    comprises seven hairpins
203. Citrate synthase [48255] (1)
  multihelical; consists of two all-alpha domains
  1. Citrate synthase [48256] (1)
    uperfamily
204. Cytochrome P450 [48263] (1)
  multihelical
  1. Cytochrome P450 [48264] (1)
    uperfamily
205. Flagellar transcriptional activator FlhD [63591] (1)
  multihelical; forms intertwined dimer of identical 5-helical subunits
  1. Flagellar transcriptional activator FlhD [63592] (1)
    uperfamily
206. HP0242-like [158751] (1)
  multihelical; intertwined homodimer of four-helical subunits, forming catenated triangular ring-like structures; pseudo knot
  1. HP0242-like [158752] (1)
207. SMc04008-like [158756] (1)
  multihelcal; intertwined homodimer; there are 4 core helices in each subunits; contains putative metal ion-binding motif MxxxxxCxxC in the conserved surface site
  1. SMc04008-like [158757] (1)
208. Ribosomal protein L7/12, oligomerisation (N-terminal) domain [48299] (1)
  multihelical; intertwined tetramer
  1. Ribosomal protein L7/12, oligomerisation (N-terminal) domain [48300] (1)
    uperfamily
209. Class II MHC-associated invariant chain ectoplasmic trimerization domain [48304] (1)
  multihelical; intertwined trimer of identical 3-helical subunits
  1. Class II MHC-associated invariant chain ectoplasmic trimerization domain [48305] (1)
    uperfamily
210. Aldehyde ferredoxin oxidoreductase, C-terminal domains [48309] (1)
  multihelical; consists of two all-alpha domains
  1. Aldehyde ferredoxin oxidoreductase, C-terminal domains [48310] (1)
    uperfamily
211. Acid phosphatase/Vanadium-dependent haloperoxidase [48316] (1)
  multihelical; core: 5-helical bundle; binds cofactor at the beginning of third helix
  1. Acid phosphatase/Vanadium-dependent haloperoxidase [48317] (3)
    uperfamily
212. BRCA2 helical domain [81871] (1)
  multihelical; contains a 3-helical bundle surrounded by several shorter helices
  1. BRCA2 helical domain [81872] (1)
    uperfamily
213. BRCA2 tower domain [81877] (1)
  multihelical; contains a 3-helical Hin recombinase-like subdomain and two long dimerisation helices
  1. BRCA2 tower domain [81878] (1)
    uperfamily
214. H-NS histone-like proteins [81274] (1)
  multihelical oligomeric protein; structure of whole subunit is not known yet but are probably composed of three different domains
  1. H-NS histone-like proteins [81273] (1)
    available NMR structures suggest two very different dimerisation modes of the N-terminal domain
    uperfamily
215. Sigma2 domain of RNA polymerase sigma factors [88945] (1)
  multihelical; consists of a conserved 4-helical core and a variable insert subdomain
  1. Sigma2 domain of RNA polymerase sigma factors [88946] (1)
    uperfamily
216. DNA repair protein MutS, domain III [48333] (1)
  multihelical; consists of 2 all-alpha subdomains
  1. DNA repair protein MutS, domain III [48334] (1)
    uperfamily
217. Helical scaffold and wing domains of SecA [81885] (1)
  multihelical; consists of 2 all-alpha subdomains
  1. Helical scaffold and wing domains of SecA [81886] (1)
    uperfamily
218. all-alpha NTP pyrophosphatases [101385] (1)
  multihelical: dimeric 4-helical bundle surrounded by other helices; oligomerizes further in a tetramer
  1. all-alpha NTP pyrophosphatases [101386] (4)
    basic module consist of 5 active site-forming helices; four from one subunit/structural repeat; the fifth from the other subunit/repeat
    uperfamily
219. Hsp90 co-chaperone CDC37 [101390] (1)
  multihelical; consists of 2 all-alpha subdomains connected by a long helix
  1. Hsp90 co-chaperone CDC37 [101391] (1)
    uperfamily
220. Nop domain [89123] (1)
  multihelical; array of longer and shorter helices; contains an alpha-hairpin dimerisation subdomain
  1. Nop domain [89124] (1)
    uperfamily
221. YidB-like [140803] (1)
  multihelical; three strings of short helices are packed across one longer helix
  1. YidB-like [140804] (1)
    uperfamily
222. Interferon-induced guanylate-binding protein 1 (GBP1), C-terminal domain [48339] (1)
  multihelical; bundle of longer and shorter helices
  1. Interferon-induced guanylate-binding protein 1 (GBP1), C-terminal domain [48340] (1)
    uperfamily
223. A virus capsid protein alpha-helical domain [48344] (1)
  multihelical; three-helical bundle in the core is surrounded by non-conserved helices
  1. A virus capsid protein alpha-helical domain [48345] (3)
    this domain is interrupted by a jelly-roll beta-sandwich domain
    uperfamily
224. P40 nucleoprotein [101398] (1)
  multihelical; consists of two subdomains
  1. P40 nucleoprotein [101399] (1)
    uperfamily
225. Rhabdovirus nucleoprotein-like [140808] (1)
  multihelical, consist of two helical domains; each domain contains a buried helix
  1. Rhabdovirus nucleoprotein-like [140809] (1)
    uperfamily
226. GTPase activation domain, GAP [48349] (1)
  multihelical
  1. GTPase activation domain, GAP [48350] (2)
    uperfamily
227. Ras GEF [48365] (1)
  multihelical
  1. Ras GEF [48366] (1)
    uperfamily
228. Telomeric repeat binding factor (TRF) dimerisation domain [63599] (1)
  multihelical; can be divided into an alpha-alpha superhelix domain and a long alpha-hairpin dimerization domain
  1. Telomeric repeat binding factor (TRF) dimerisation domain [63600] (1)
    uperfamily
229. Poly A polymerase C-terminal region-like [81890] (1)
  multihelical; can be divided into three subdomains (neck, body and tail)
  1. Poly A polymerase C-terminal region-like [81891] (1)
    the neck subdomain is an alpha-alpha superhelix; the tail subdomain is similar to the RuvA C-terminal domain-like
    uperfamily
230. alpha-alpha superhelix [48370] (24)
  multihelical; 2 (curved) layers: alpha/alpha; right-handed superhelix
  1. ARM repeat [48371] (23)
    uperfamily
  2. IP3 receptor type 1 binding core, domain 2 [100909] (1)
    uperfamily
  3. Chemosensory protein Csp2 [100910] (1)
    uperfamily
  4. Sec7 domain [48425] (1)
    uperfamily
  5. Lipovitellin-phosvitin complex, superhelical domain [48431] (1)
    uperfamily
  6. Bacterial muramidases [48435] (1)
    uperfamily
  7. Aconitase B, N-terminal domain [74778] (1)
    uperfamily
  8. HCP-like [81901] (1)
    uperfamily
  9. Protein prenylyltransferase [48439] (1)
    uperfamily
  10. 14-3-3 protein [48445] (1)
    uperfamily
  11. TPR-like [48452] (8)
    uperfamily
  12. ENTH/VHS domain [48464] (4)
    uperfamily
  13. Translin [74784] (1)
    uperfamily
  14. Ran-GTPase activating protein 1 (RanGAP1), C-terminal domain [69099] (1)
    uperfamily
  15. Arp2/3 complex 16 kDa subunit ARPC5 [69103] (1)
    uperfamily
  16. FliG [48029] (1)
    fragmented superhelix; consist of 3/4-helical motifs and connecting helices
    uperfamily
  17. Cullin repeat-like [74788] (2)
    uperfamily
  18. C-terminal domain of Ku80 [101420] (1)
    uperfamily
  19. Hypothetical protein ST1625 [101424] (1)
    uperfamily
  20. Cytochrome c oxidase subunit E [48479] (1)
    uperfamily
  21. USP8 N-terminal domain-like [140856] (1)
    uperfamily
  22. Pseudo ankyrin repeat-like [140860] (1)
    contains three helices per turn of the superhelix
    uperfamily
  23. TROVE domain-like [140864] (1)
    consist of two superhelical sections arranged like a horse-shoe
    uperfamily
  24. MgtE N-terminal domain-like [158791] (1)
    made of short helices; approximately 2.5 helices per turn of superhelix
231. GUN4-like [140868] (1)
  multihelical; open array, trapping inside an extended region before the C-terminal helix
  1. GUN4-like [140869] (1)
    uperfamily
232. Lipoxigenase [48483] (1)
  multihelical
  large nearly all-alpha domain
  1. Lipoxigenase [48484] (2)
    uperfamily
233. gene 59 helicase assembly protein [48492] (1)
  multihelical; consists of two all-alpha subdomains
  1. gene 59 helicase assembly protein [48493] (1)
    uperfamily
234. Tetracyclin repressor-like, C-terminal domain [48497] (1)
  multihelical; interlocked (homo)dimer
  1. Tetracyclin repressor-like, C-terminal domain [48498] (1)
    uperfamily
235. Skp1 dimerisation domain-like [81384] (1)
  multihelical; interlocked heterodimer with F-box proteins
  1. Skp1 dimerisation domain-like [81382] (1)
    uperfamily
236. F-box domain [81385] (1)
  multihelical; interlocked heterodimer with the Skp1 dimerisation domain
  1. F-box domain [81383] (1)
    uperfamily
237. Nuclear receptor ligand-binding domain [48507] (1)
  multihelical; 3 layers or orthogonally packed helices
  1. Nuclear receptor ligand-binding domain [48508] (1)
    uperfamily
238. Phospholipase C/P1 nuclease [48536] (1)
  multihelical
  1. Phospholipase C/P1 nuclease [48537] (2)
    duplication: all chain but the N-terminal helix forms two structural repeats
    uperfamily
239. ATP-dependent DNA ligase DNA-binding domain [117017] (1)
  multihelical; duplication: contains two intertwined structural repeats related by pseudo twofold symmetry
  1. ATP-dependent DNA ligase DNA-binding domain [117018] (1)
    uperfamily
240. DNA primase DnaG, C-terminal domain [117022] (1)
  multihelical; segment-swapped dimer
  1. DNA primase DnaG, C-terminal domain [117023] (1)
    uperfamily
241. PriB N-terminal domain-like [140913] (1)
  multihelical bundle; contains buried central helix; also includes the PriA interface-forming insert subdomain (alpha+beta)
  1. PriB N-terminal domain-like [140914] (1)
    uperfamily
242. VPS9 domain [109992] (1)
  multihelical; consist of two subdomains
  1. VPS9 domain [109993] (1)
    uperfamily
243. Triger factor/SurA peptide-binding domain-like [109997] (1)
  multihelical; irregular array of long and short helices
  1. Triger factor/SurA peptide-binding domain-like [109998] (2)
    there are sequence and functional similarities between the families, but their structural similarity is obscured by conformational flexibility (in the TF family)
    uperfamily
244. DNA terminal protein [140918] (1)
  multihelical, open array; contains the C-terminal four-helical bundle, left-handed superhelix
  1. DNA terminal protein [140919] (1)
    uperfamily
245. Glycolipid transfer protein, GLTP [110003] (1)
  multihelical; 2 layers or orthogonally packed helices
  1. Glycolipid transfer protein, GLTP [110004] (1)
    uperfamily
246. Hypothetical protein MG354 [110008] (1)
  multihelical bundle; contains buried central helix
  1. Hypothetical protein MG354 [110009] (1)
    uperfamily
247. Duffy binding domain-like [140923] (1)
  consist of two subdomains, each containing a three-helical bundle
  1. Duffy binding domain-like [140924] (1)
    uperfamily
248. Fic-like [140930] (1)
  multihelical; one central helix is surrounded by seven helices
  1. Fic-like [140931] (1)
    uperfamily
249. Her-1 [110013] (1)
  multihelical; consists of two topologically similar alpha-helical bundles
  1. Her-1 [110014] (1)
    uperfamily
250. ERO1-like [110018] (1)
  multihelical; consists of 2 four-helical bundles
  1. ERO1-like [110019] (1)
    similar active site architecture to scop_sf 69000
    uperfamily
251. Serum albumin-like [48551] (1)
  multihelical; one domain consists of two similar disulfide-linked subdomains
  1. Serum albumin-like [48552] (1)
    uperfamily
252. L-aspartase-like [48556] (1)
  multihelical, consists of three all-alpha domains
  1. L-aspartase-like [48557] (2)
    uperfamily
253. Formin homology 2 domain (FH2 domain) [101446] (1)
  multihelical, consists of three all-alpha domains
  1. Formin homology 2 domain (FH2 domain) [101447] (1)
    uperfamily
254. Terpenoid synthases [48575] (1)
  multihelical; core: 8 helices (C-J) are arranged in 2 parallel layers
  1. Terpenoid synthases [48576] (5)
    duplication: two metal-binding sites are related by a pseudo dyad that also relates helices C-F to helices G-J
    uperfamily
255. GroEL equatorial domain-like [48591] (1)
  multihelical; 8 helices arranged in 2 parallel layers
  1. GroEL equatorial domain-like [48592] (2)
    duplication: two 4-helical subdomains are related by a pseudo dyad passing through the ATP-binding site
    uperfamily
256. TorD-like [89154] (1)
  multihelical; bundle
  1. TorD-like [89155] (1)
    uperfamily
257. Chorismate mutase II [48599] (1)
  multihelical; core: 6 helices, bundle
  1. Chorismate mutase II [48600] (4)
    uperfamily
258. Peridinin-chlorophyll protein [48607] (1)
  multihelical: forms a boat-shaped protein shell around cofactors
  1. Peridinin-chlorophyll protein [48608] (1)
    duplication: consists of two 8-helical repeats
    uperfamily
259. Heme oxygenase-like [48612] (1)
  multihelical; bundle
  1. Heme oxygenase-like [48613] (4)
    duplication: contains two structural repeats of 3-helical motif
    uperfamily
260. Indolic compounds 2,3-dioxygenase-like [140958] (1)
  multihelical; bundle, contains interrupted helices
  1. Indolic compounds 2,3-dioxygenase-like [140959] (2)
    contains heme-dependent enzymes
    uperfamily
261. AhpD-like [69117] (1)
  multihelical; contains 4-helical bundle and 2-helical arm
  1. AhpD-like [69118] (4)
    probable biological unit contains six domains of this fold arranged with 32 symmetry
    uperfamily
262. Double Clp-N motif [81922] (1)
  multihelical; array
  1. Double Clp-N motif [81923] (1)
    duplication: contains two structural repeats of 4-helical motif
    uperfamily
263. Orange carotenoid protein, N-terminal domain [81929] (1)
  multihelical; array
  1. Orange carotenoid protein, N-terminal domain [81930] (1)
    duplication: contains four structural repeats arranged into two intertwined 4-helical subdomains
    uperfamily
264. DhaL-like [101472] (1)
  multihelical; bundle
  1. DhaL-like [101473] (1)
    uperfamily
265. ADP-ribosylglycohydrolase [101477] (1)
  multihelical; bundle
  1. ADP-ribosylglycohydrolase [101478] (1)
    uperfamily
266. Topoisomerase V catalytic domain-like [140978] (1)
  multihelical; irregular array; contains small amount of beta-structure and a 3-helical bundle with a variant homeofomain-like fold and HTH motif (scop_cf 46688)
  1. Topoisomerase V catalytic domain-like [140979] (1)
    uperfamily
267. PTPA-like [140983] (1)
  multihelical
  1. PTPA-like [140984] (1)
    uperfamily
268. Tex N-terminal region-like [158831] (1)
  multihelical; irregular array of long and short helices; can be divided into several subdomains
  1. Tex N-terminal region-like [158832] (1)
269. AGR_C_984p-like [158836] (1)
  multihelical, consists of two subdomains; duplication: there are two 5-helical structural repeats, one in each subdomain
  1. AGR_C_984p-like [158837] (1)
270. PMT central region-like [158841] (1)
  multihelical; comprises two four-helical bundles of different topologies and an irregular helical array packed against a small beta-sheet
  1. PMT central region-like [158842] (1)
271. FtsH protease domain-like [140989] (1)
  array of 6 helices and a 2-stranded beta-ribbon
  1. FtsH protease domain-like [140990] (1)
    contains zincin-like (scop_sf 55486) metal-binding motif HExxH, embedded into a topologically different fold
    uperfamily
272. Gametocyte protein Pfg27 [89161] (1)
  multihelical; bundle
  1. Gametocyte protein Pfg27 [89162] (1)
    duplication: contains two structural repeats of four helices each
    uperfamily
273. N-terminal domain of bifunctional PutA protein [81934] (1)
  multihelical; array
  1. N-terminal domain of bifunctional PutA protein [81935] (1)
    uperfamily
274. Cysteine alpha-hairpin motif [47071] (1)
  core: alpha-hairpin crosslinked with two disulfides
  1. Cysteine alpha-hairpin motif [47072] (2)
    uperfamily
275. Phospholipase A2, PLA2 [48618] (1)
  common core: 2 helices, disulfide-linked, and a calcium-binding loop
  1. Phospholipase A2, PLA2 [48619] (3)
    uperfamily
276. Fungal elicitin [48646] (1)
  5 helices: irregular disulfide-linked array; also contains a small beta-hairpin
  1. Fungal elicitin [48647] (1)
    uperfamily
277. Tetraspanin [48651] (1)
  5 helices: irregular disulfide-linked array; form homodimer
  1. Tetraspanin [48652] (1)
    uperfamily
278. GDNF receptor-like [110034] (1)
  5 helices: irregular disulfide-linked array; topological similarity to the Fungal elicitin fold (scop_cf 48646)
  1. GDNF receptor-like [110035] (1)
    uperfamily
279. FinO-like [48656] (1)
  6 helices: irregular non-globular array; also contains two small beta-hairpins
  1. FinO-like [48657] (1)
    uperfamily
280. Nuclear receptor coactivator interlocking domain [69124] (1)
  3 helices, non-globular array; forms interlocked heterodimers with its targets
  1. Nuclear receptor coactivator interlocking domain [69125] (1)
    not a true superfamily
    uperfamily
281. Hermes dimerisation domain [140995] (1)
  multihelical, intertwinned dimer of two 4-helical strings
  1. Hermes dimerisation domain [140996] (1)
    uperfamily
282. Eukaryotic initiation factor 4f subunit eIF4g, eIF4e-binding domain [101488] (1)
  5 helices, non-globular array; wraps around the N-terminal tail of its target
  1. Eukaryotic initiation factor 4f subunit eIF4g, eIF4e-binding domain [101489] (1)
    not a true superfamily
    uperfamily
283. Non-globular all-alpha subunits of globular proteins [48661] (14)
  not a true fold
  1. Ribosomal protein L39e [48662] (1)
    interrupted alpha-helix
    uperfamily
  2. Methanol dehydrogenase subunit [48666] (1)
    consists of single alpha-helix and irregular N-terminal tail
    uperfamily
  3. Transducin (heterotrimeric G protein), gamma chain [48670] (1)
    long alpha-helix interrupted in the middle
    uperfamily
  4. Fe-only hydrogenase smaller subunit [48674] (1)
    uperfamily
  5. Moesin tail domain [48678] (1)
    uperfamily
  6. Proteinase A inhibitor IA3 [48686] (1)
    uperfamily
  7. Epsilon subunit of mitochondrial F1F0-ATP synthase [48690] (1)
    uperfamily
  8. Quinohemoprotein amine dehydrogenase C chain [69131] (1)
    uperfamily
  9. Stathmin [101494] (1)
    single long helix crosslinking four tubulin subunits
    uperfamily
  10. Anti-sigma factor FlgM [101498] (1)
    uperfamily
  11. Glu-tRNAGln amidotransferase C subunit [141000] (1)
    uperfamily
  12. RelB-like [141004] (1)
    wraps around RelE subunit
    uperfamily
  13. Lag-3 N-terminal region [158851] (1)
    long kinked helix, part of the CSL-Notch-Mastermind ternary complex
  14. Lipase chaperone-like [158855] (1)
    open single layer scaffold of 11 helices, which engulfs the substrate protein
284. Multiheme cytochromes [48694] (1)
  variable number of helices and little beta structure; not a true fold
  1. Multiheme cytochromes [48695] (3)
    duplication: contains multiple CxxCH motifs
    uperfamily
All beta proteins [48724] (174)
1. Immunoglobulin-like beta-sandwich [48725] (28)
  sandwich; 7 strands in 2 sheets; greek-key
  some members of the fold have additional strands
  1. Immunoglobulin [48726] (4)
    uperfamily
  2. E set domains [81296] (23)
    "Early" Ig-like fold families possibly related to the immunoglobulin and/or fibronectin type III superfamilies
    uperfamily
  3. Fibronectin type III [49265] (1)
    uperfamily
  4. PKD domain [49299] (1)
    uperfamily
  5. beta-Galactosidase/glucuronidase domain [49303] (1)
    uperfamily
  6. Transglutaminase, two C-terminal domains [49309] (1)
    uperfamily
  7. Cadherin-like [49313] (2)
    uperfamily
  8. Actinoxanthin-like [49319] (1)
    uperfamily
  9. Cu,Zn superoxide dismutase-like [49329] (1)
    has additional strand at N-terminus
    uperfamily
  10. CBD9-like [49344] (3)
    has additional strand at N-terminus; the active site in a similar topological location as the Cu,Zn SOD site
    uperfamily
  11. Lamin A/C globular tail domain [74853] (1)
    uperfamily
  12. Clathrin adaptor appendage domain [49348] (3)
    contains an additional N-terminal strand
    uperfamily
  13. Integrin domains [69179] (1)
    uperfamily
  14. PapD-like [49354] (2)
    contains PP switch between strands D and C'
    uperfamily
  15. Purple acid phosphatase, N-terminal domain [49363] (1)
    uperfamily
  16. Fungal immunomodulatory protein, FIP [101542] (1)
    uperfamily
  17. Superoxide reductase-like [49367] (1)
    uperfamily
  18. Thiol:disulfide interchange protein DsbD, N-terminal domain (DsbD-alpha) [74863] (1)
    uperfamily
  19. Invasin/intimin cell-adhesion fragments [49373] (1)
    uperfamily
  20. Antigen MPT63/MPB63 (immunoprotective extracellular protein) [81982] (1)
    uperfamily
  21. Tp47 lipoprotein, middle and C-terminal domains [81986] (1)
    uperfamily
  22. ASF1-like [101546] (1)
    contains extra C-terminal strand
    uperfamily
  23. ApaG-like [110069] (1)
    uperfamily
  24. Accessory protein X4 (ORF8, ORF7a) [117066] (1)
    uperfamily
  25. LEA14-like [117070] (1)
    uperfamily
  26. ICP-like [141066] (1)
    topological variant with similarity to the Cupredoxin-like fold (scop_cf 49502) in the N-terminal region
    uperfamily
  27. CalX-like [141072] (1)
    uperfamily
  28. NEAT domain-like [158911] (1)
2. Common fold of diphtheria toxin/transcription factors/cytochrome f [49379] (10)
  sandwich; 9 strands in 2 sheet; greek-key; subclass of immunoglobin-like fold
  1. Diphtheria toxin, C-terminal domain [49380] (1)
    uperfamily
  2. Carbohydrate-binding domain [49384] (3)
    uperfamily
  3. Bacterial adhesins [49401] (6)
    uperfamily
  4. Alpha-macroglobulin receptor domain [49410] (1)
    uperfamily
  5. p53-like transcription factors [49417] (7)
    uperfamily
  6. Cytochrome f, large domain [49441] (1)
    uperfamily
  7. beta-sandwich domain of Sec23/24 [81995] (1)
    uperfamily
  8. Second domain of Mu2 adaptin subunit (ap50) of ap2 adaptor [49447] (1)
    duplication: one domain of this fold is inserted into another domain of the same fold
    uperfamily
  9. Peptidylarginine deiminase Pad4, middle domain [110083] (1)
    uperfamily
  10. DR1885-like metal-binding protein [110087] (1)
    uperfamily
3. Prealbumin-like [49451] (7)
  sandwich; 7 strands in 2 sheets, greek-key
  variations: some members have additional 1-2 strands to common fold
  1. Starch-binding domain-like [49452] (3)
    uperfamily
  2. Carboxypeptidase regulatory domain-like [49464] (2)
    uperfamily
  3. VHL [49468] (1)
    uperfamily
  4. Transthyretin (synonym: prealbumin) [49472] (1)
    uperfamily
  5. Cna protein B-type domain [49478] (1)
    uperfamily
  6. Aromatic compound dioxygenase [49482] (1)
    uperfamily
  7. Hypothetical protein PA1324 [117074] (1)
    uperfamily
4. HSP40/DnaJ peptide-binding domain [49492] (1)
  sandwich; 6 strands in 2 sheets
  1. HSP40/DnaJ peptide-binding domain [49493] (1)
    uperfamily
5. Penicillin-binding protein associated domain [69188] (1)
  sandwich; 6 strands in 2 sheets
  1. Penicillin-binding protein associated domain [69189] (2)
    uperfamily
6. alpha-Amylase inhibitor tendamistat [49497] (1)
  sandwich; 6 strands in 2 sheets
  1. alpha-Amylase inhibitor tendamistat [49498] (1)
    uperfamily
7. C-terminal domain of mollusc hemocyanin [81278] (1)
  six-stranded beta-sandwich, jelly-roll/greek-key topology
  1. C-terminal domain of mollusc hemocyanin [81277] (1)
    analogous to the Ig-like domain of arthropod hemocyanin; similar sequential but different spatial position relative the shared domain
    uperfamily
8. HPA-like [141085] (1)
  sandwich, 6 strands in 2 sheets; jelly-roll (truncated); also includes the pending PCSK9 V domain-like superfamily (the C-terminal domains of 2p4e and 2pmw)
  1. Agglutinin HPA-like [141086] (1)
    forms similar trimers to the PCSK9 V domain; strand directions of the subunit beta-sheets are parallel to the three-fold symmetry axis;
    uperfamily
9. L21p-like [141090] (1)
  core: sandwich, 6 strands in 2 sheets
  1. L21p-like [141091] (1)
    uperfamily
10. Cupredoxin-like [49502] (2)
  sandwich; 7 strands in 2 sheets, greek-key
  variations: some members have additional 1-2 strands
  1. Cupredoxins [49503] (7)
    contains copper-binding site
    uperfamily
  2. Major surface antigen p30, SAG1 [74877] (1)
    SS-crosslinked beta-sandwich of distinct geometry but topologically similar to cupredoxins
    uperfamily
11. Ctag/Cox11 [110110] (1)
  sandwich; 7 strands in 2 sheets, greek-key; permutation of the immunoglobulin-like fold
  1. Ctag/Cox11 [110111] (1)
    uperfamily
12. Atu1913-like [141098] (1)
  sandwich; 7 strands in two sheets, greek-key/jelly-roll; forms segment swapped dimers, swapping is probably facilitated by the helix insertion after strand 3
  1. Atu1913-like [141099] (1)
    uperfamily
13. C2 domain-like [49561] (5)
  sandwich; 8 strands in 2 sheets; greek-key
  1. C2 domain (Calcium/lipid-binding domain, CaLB) [49562] (2)
    two constituent families are related by circular permutation
    uperfamily
  2. Periplasmic chaperone C-domain [49584] (1)
    uperfamily
  3. PHL pollen allergen [49590] (1)
    uperfamily
  4. Rab geranylgeranyltransferase alpha-subunit, insert domain [49594] (1)
    uperfamily
  5. Smr-associated domain-like [158949] (1)
14. TRAF domain-like [49598] (1)
  sandwich; 8 strands in 2 sheets; greek-key
  1. TRAF domain-like [49599] (2)
    has a circularly permuted immunoglobulin-fold topology with extra strand
    uperfamily
15. Neurophysin II [49605] (1)
  sandwich; 8 strands in 2 sheets; meander
  1. Neurophysin II [49606] (1)
    duplication: composed of two structural repeats
    uperfamily
16. N-utilization substance G protein NusG, insert domain [82003] (1)
  sandwich; 8 strands in 2 sheets; meander
  1. N-utilization substance G protein NusG, insert domain [82004] (1)
    uperfamily
17. Nucleoplasmin-like/VP (viral coat and capsid proteins) [88632] (7)
  sandwich; 8 strands in 2 sheets; jelly-roll; some members can have additional 1-2 strands
  characteristic interaction between the domains of this fold allows the formation of five-fold and pseudo six-fold assemblies
  1. Nucleoplasmin-like core domain [69203] (1)
    oligomerizes into a pentameric ring structure
    uperfamily
  2. Positive stranded ssRNA viruses [88633] (9)
    uperfamily
  3. ssDNA viruses [88645] (3)
    uperfamily
  4. Group I dsDNA viruses [88648] (1)
    uperfamily
  5. Group II dsDNA viruses VP [49749] (3)
    duplication: consists of two domains of this fold packed together like the nucleoplasmin subunits
    trimeric; in the trimers, the domains are arranged around pseudo six-fold axis
    uperfamily
  6. Satellite viruses [88650] (1)
    uperfamily
  7. PHM/PNGase F [49742] (2)
    members of this superfamily bind peptide substrates
    duplication: consists of two domains of this fold packed together like the adjacent nucleoplasmin subunits
    uperfamily
18. gamma-Crystallin-like [49694] (1)
  sandwich; 8 strands in 2 sheets; greek-key
  duplication: has internal pseudo twofold symmetry
  1. gamma-Crystallin-like [49695] (6)
    uperfamily
19. Lipase/lipooxygenase domain (PLAT/LH2 domain) [49722] (1)
  sandwich; 8 strands in 2 sheets; complex topology
  duplication: has weak internal pseudo twofold symmetry
  1. Lipase/lipooxygenase domain (PLAT/LH2 domain) [49723] (3)
    uperfamily
20. Calpain large subunit, middle domain (domain III) [49757] (1)
  sandwich; 8 strands in 2 sheets; jelly-roll
  1. Calpain large subunit, middle domain (domain III) [49758] (1)
    uperfamily
21. Supernatant protein factor (SPF), C-terminal domain [101575] (1)
  sandwich; 8 strands in 2 sheets; jelly-roll; similarity to the Nucleoplasmin-like/VP fold
  1. Supernatant protein factor (SPF), C-terminal domain [101576] (1)
    uperfamily
22. Hypothetical protein TM1070 [89231] (1)
  sandwich; 8 strands in 2 sheets; jelly-roll
  1. Hypothetical protein TM1070 [89232] (1)
    uperfamily
23. Olfactory marker protein [63696] (1)
  sandwich; 8 strands in 2 sheets; jelly-roll
  1. Olfactory marker protein [63697] (1)
    uperfamily
24. HSP20-like chaperones [49763] (1)
  sandwich; 8 strands in 2 sheets; greek-key
  1. HSP20-like chaperones [49764] (4)
    uperfamily
25. Heat shock protein 70kD (HSP70), peptide-binding domain [100919] (1)
  beta-sandwich: 8 strands in 2 sheets
  1. Heat shock protein 70kD (HSP70), peptide-binding domain [100920] (1)
    uperfamily
26. Ecotin, trypsin inhibitor [49771] (1)
  sandwich; 8 strands in 2 sheets; complex topology with the crossing loops
  1. Ecotin, trypsin inhibitor [49772] (1)
    uperfamily
27. PEBP-like [49776] (1)
  sandwich; 8 strands in 2 sheets; greek-key: partial topological similarity to immunoglobulin-like folds
  1. PEBP-like [49777] (2)
    uperfamily
28. Ganglioside M2 (gm2) activator [63706] (1)
  sandwich; 8 strands in 2 sheets; greek-key: partial topological similarity to immunoglobulin-like folds
  1. Ganglioside M2 (gm2) activator [63707] (1)
    uperfamily
29. Nicotinic receptor ligand binding domain-like [63711] (1)
  sandwich; 8 strands in 2 sheets; greek-key: partial topological similarity to immunoglobulin-like folds
  1. Nicotinic receptor ligand binding domain-like [63712] (1)
    uperfamily
30. Beta-galactosidase LacA, domain 3 [117099] (1)
  sandwich; 8 strands in 2 sheets
  1. Beta-galactosidase LacA, domain 3 [117100] (1)
    uperfamily
31. Galactose-binding domain-like [49784] (1)
  sandwich; 9 strands in 2 sheets; jelly-roll
  1. Galactose-binding domain-like [49785] (32)
    uperfamily
32. Viral protein domain [49817] (1)
  sandwich; 9 strands in 2 sheets; jelly-roll; form trimers
  1. Viral protein domain [49818] (3)
    forms homotrimers
    uperfamily
33. Calcium-mediated lectin [82025] (1)
  sandwich; 9 strands in 2 sheets; greek-key
  1. Calcium-mediated lectin [82026] (1)
    uperfamily
34. Dextranase, N-terminal domain [101595] (1)
  sandwich; 9 strands in 2 sheets; greek-key
  1. Dextranase, N-terminal domain [101596] (1)
    uperfamily
35. Smp-1-like [101600] (1)
  sandwich; 9 strands in 2 sheets; greek-key/jelly-roll
  1. Smp-1-like [101601] (1)
    uperfamily
36. Superantigen (mitogen) Ypm [101605] (1)
  sandwich; 9 strands in 2 sheets; jelly-roll
  1. Superantigen (mitogen) Ypm [101606] (1)
    uperfamily
37. ENV polyprotein, receptor-binding domain [49829] (1)
  sandwich; 9 strands in 2 sheets; greek-key; contains a few helices in loop regions
  1. ENV polyprotein, receptor-binding domain [49830] (1)
    uperfamily
38. BTV NS2-like ssRNA-binding domain [110131] (1)
  sandwich; 9 strands in 2 sheets; unusual topology with 2 crossover loops
  1. BTV NS2-like ssRNA-binding domain [110132] (1)
    uperfamily
39. WSSV envelope protein-like [158973] (1)
  beta-sandwich; 9 strands in 2 sheets; greek-key
  1. WSSV envelope protein-like [158974] (1)
40. Virus attachment protein globular domain [49834] (1)
  sandwich, 10 strands in 2 sheets; greek-key
  1. Virus attachment protein globular domain [49835] (3)
    uperfamily
41. TNF-like [49841] (1)
  sandwich, 10 strands in 2 sheets; jelly-roll
  1. TNF-like [49842] (1)
    uperfamily
42. CUB-like [49853] (3)
  sandwich, 10 strands in 2 sheets; jelly-roll
  1. Spermadhesin, CUB domain [49854] (1)
    uperfamily
  2. Collagen-binding domain [89260] (1)
    N-terminal strand appears only in calcium-free form
    uperfamily
  3. Acetamidase/Formamidase-like [141130] (1)
    decorated fold with additional structures; contains extra C-terminal alpha+beta subdomain: beta(2)-alpha(2)-beta(2): antiparallel beta-sheet, order 1243
    uperfamily
43. Hyaluronate lyase-like, C-terminal domain [49862] (1)
  sandwich, 10 strands in 2 sheets; "folded meander"
  1. Hyaluronate lyase-like, C-terminal domain [49863] (1)
    uperfamily
44. Cytolysin/lectin [63723] (1)
  sandwich, 10 strands in 2 sheets;
  1. Cytolysin/lectin [63724] (2)
    some topological similarity to osmotin
    uperfamily
45. Putative glucosidase YicI, C-terminal domain [117124] (1)
  sandwich; 10 strands in two sheets
  1. Putative glucosidase YicI, C-terminal domain [117125] (1)
    uperfamily
46. CsrA-like [117129] (1)
  sandwich; 10 strands in 2 sheets; intertwined dimer (segment-swapped, 5-stranded greek-key sandwich?)
  1. CsrA-like [117130] (1)
    uperfamily
47. Osmotin, thaumatin-like protein [49869] (1)
  sandwich; 11 strands in 2 sheets
  1. Osmotin, thaumatin-like protein [49870] (1)
    has two smaller insertion domains
    uperfamily
48. SMAD/FHA domain [49878] (1)
  sandwich; 11 strands in 2 sheets; greek-key
  1. SMAD/FHA domain [49879] (4)
    has a few short helices inserted in loops
    uperfamily
49. Soluble secreted chemokine inhibitor, VCCI [49888] (1)
  sandwich; 11 strands in 2 sheets; greek-key
  1. Soluble secreted chemokine inhibitor, VCCI [49889] (1)
    uperfamily
50. Baculovirus p35 protein [49893] (1)
  sandwich; 14 strands in 2 sheets; greek-key
  1. Baculovirus p35 protein [49894] (1)
    has a few helices inserted in loops
    uperfamily
51. Concanavalin A-like lectins/glucanases [49898] (1)
  sandwich; 12-14 strands in 2 sheets; complex topology
  1. Concanavalin A-like lectins/glucanases [49899] (25)
    uperfamily
52. Supersandwich [49993] (3)
  sandwich; 18 strands in 2 sheets
  1. Galactose mutarotase-like [74650] (11)
    probable carbohydrate-binding domain in enzymes acting on sugars
    uperfamily
  2. V-region of surface antigen I/II (SA I/II, PAC) [74914] (1)
    uperfamily
  3. Amine oxidase catalytic domain [49998] (1)
    uperfamily
53. Leukotriene A4 hydrolase N-terminal domain [63736] (1)
  duplication: two beta-sandwiches of similar topologies are fused together in a single three beta-sheet domain
  1. Leukotriene A4 hydrolase N-terminal domain [63737] (1)
    uperfamily
54. EV matrix protein [50011] (1)
  consists of two beta-sandwich domains of similar topologies
  1. EV matrix protein [50012] (1)
    uperfamily
55. Viral chemokine binding protein m3 [82045] (1)
  consists of two different beta-sandwich domains of partial topological similarity to immunoglobulin-like folds
  1. Viral chemokine binding protein m3 [82046] (1)
    uperfamily
56. gp9 [50016] (1)
  consists of two different beta-sandwich domains unrelated to other beta-sandwich folds
  1. gp9 [50017] (1)
    uperfamily
57. Flagellar hook protein flgE [117142] (1)
  consists of two different domains; d1: [complex fold made of bifurcated beta-sheets]; d2 (inserted into d1): [beta-sandwich; 8 strands in 2 sheets]
  1. Flagellar hook protein flgE [117143] (1)
    uperfamily
58. ISP domain [50021] (1)
  consists of two all-beta subdomains: conserved small domain has a rubredoxin-like fold; larger domain consists of 6 beta-stands packed in either sandwich of two 3-stranded sheets or closed barrel (n=6; S=8)
  1. ISP domain [50022] (3)
    uperfamily
59. Trm112p-like [158996] (1)
  similar to the small domain of the ISP (scop_cf 50021)
  1. Trm112p-like [158997] (1)
    possibly have evolved from a metal ion (or cofactor)-binding protein of a rubredoxin-like fold; in the known members, from one to three of the four metal-binding positions are occupied by cysteine residues
60. YopX-like [159005] (1)
  consists of two domains: the N-terminal dimerisation domain of variable structure and the C-terminal domain with similarity to the SH3-like fold
  1. YopX-like [159006] (1)
    conmrises proteins of plasmid and phage origins
61. Obg-fold [82050] (1)
  this fold is formed by three glycine-rich regions inserted into a small 8-stranded beta-sandwich
  these regions form six left-handed collagen-like helices packed and H-bonded together
  1. Obg GTP-binding protein N-terminal domain [82051] (1)
    uperfamily
62. SH3-like barrel [50036] (21)
  barrel, partly opened; n*=4, S*=8; meander
  the last strand is interrupted by a turn of 3-10 helix
  1. C-terminal domain of transcriptional repressors [50037] (3)
    the N-terminal domains of these repressors bind DNA
    uperfamily
  2. SH3-domain [50044] (1)
    uperfamily
  3. Prokaryotic SH3-related domain [82057] (4)
    uperfamily
  4. Myosin S1 fragment, N-terminal domain [50084] (1)
    uperfamily
  5. Tudor/PWWP/MBT [63748] (4)
    uperfamily
  6. Chromo domain-like [54160] (3)
    SH3-like barrel is capped by a C-terminal helix
    uperfamily
  7. BAH domain [82061] (1)
    uperfamily
  8. PAZ domain [101690] (1)
    uperfamily
  9. Cap-Gly domain [74924] (1)
    uperfamily
  10. Electron transport accessory proteins [50090] (4)
    uperfamily
  11. Translation proteins SH3-like domain [50104] (7)
    many known members contain KOW motif
    uperfamily
  12. Cell growth inhibitor/plasmid maintenance toxic component [50118] (3)
    contains insert beta-sheet subdomain and C-terminal helix
    uperfamily
  13. Fumarylacetoacetate hydrolase, FAH, N-terminal domain [63433] (1)
    uperfamily
  14. DNA-binding domain of retroviral integrase [50122] (1)
    uperfamily
  15. Hypothetical protein YfhH [101697] (1)
    contains extra N-terminal all-alpha subdomain
    uperfamily
  16. Kinase-associated protein B-like [141251] (1)
    contains extra C-terminal alpha-hairpin
    uperfamily
  17. YccV-like [141255] (1)
    contains extra C-terminal helix packed against barrel
    uperfamily
  18. CarD-like [141259] (1)
    uperfamily
  19. Mib/herc2 domain-like [159034] (1)
  20. YorP-like [159038] (1)
  21. Plus3-like [159042] (1)
63. GroES-like [50128] (2)
  contains barrel, partly opened; n*=4, S*=8; meander
  1. GroES-like [50129] (2)
    uperfamily
  2. SacY-like RNA-binding domain [50151] (1)
    uperfamily
64. PDZ domain-like [50155] (1)
  contains barrel, partly opened; n*=4, S*=8; meander; capped by alpha-helix
  1. PDZ domain-like [50156] (6)
    peptide-binding domain
    uperfamily
65. N-terminal domains of the minor coat protein g3p [50175] (1)
  core: barrel, in some members open; n*=4, S*=8; meander
  1. N-terminal domains of the minor coat protein g3p [50176] (1)
    uperfamily
66. Sm-like fold [50181] (5)
  core: barrel, open; n*=4, S*=8; meander; SH3-like topology
  1. Sm-like ribonucleoproteins [50182] (6)
    uperfamily
  2. YhbC-like, C-terminal domain [74942] (1)
    uperfamily
  3. GatD N-terminal domain-like [141300] (1)
    uperfamily
  4. Dom34/Pelota N-terminal domain-like [159065] (1)
  5. TrmB C-terminal domain-like [159071] (1)
    sugar-binding domain; permuted OB-fold?
67. SspB-like [101737] (1)
  core: barrel, open; n*=4, S*=8; meander; SH3-like topology; some similarity to the Sm-like fold
  1. SspB-like [101738] (2)
    uperfamily
68. Rof/RNase P subunit-like [101743] (1)
  core: barrel, open; n*=4, S*=8; meander; SH3-like topology; some similarity to the Sm-like fold
  1. Rof/RNase P subunit-like [101744] (2)
    uperfamily
69. Hydrophobin II, HfbII [101750] (1)
  core: barrel, closed; n=4, S=8; complex topology; helix-containing crossover connection
  1. Hydrophobin II, HfbII [101751] (1)
    uperfamily
70. Ribosomal protein L14 [50192] (1)
  barrel, closed; n=5, S=8, meander
  1. Ribosomal protein L14 [50193] (1)
    uperfamily
71. OB-fold [50198] (16)
  barrel, closed or partly opened n=5, S=10 or S=8; greek-key
  1. Staphylococcal nuclease [50199] (1)
    uperfamily
  2. Bacterial enterotoxins [50203] (2)
    uperfamily
  3. TIMP-like [50242] (3)
    uperfamily
  4. Heme chaperone CcmE [82093] (1)
    uperfamily
  5. gp5 N-terminal domain-like [69255] (1)
    uperfamily
  6. Hypothetical protein YgiW [101756] (1)
    uperfamily
  7. Nucleic acid-binding proteins [50249] (16)
    uperfamily
  8. Inorganic pyrophosphatase [50324] (1)
    uperfamily
  9. MOP-like [50331] (3)
    uperfamily
  10. CheW-like [50341] (1)
    uperfamily
  11. TM0957-like [141318] (1)
    extra N-terminal region and large insertion after strand 3 together form an alpha-helical subdomain
    uperfamily
  12. NfeD domain-like [141322] (1)
    close structural similarity to some members of the Nucleic acid-binding OB-fold proteins, possibly related to this superfamily
    uperfamily
  13. BC4932-like [159121] (1)
  14. HupF/HypC-like [159127] (1)
    contains extra C-terminal helix packed against the beta-barrel side
  15. EutN/CcmL-like [159133] (1)
    homohexameric unit
  16. HIN-2000 domain-like [159141] (1)
    duplication: tandem repeat of two OB-fold domains
72. PRC-barrel domain [50345] (1)
  core: barrel, partly opened; n*=5, S*=8; meander
  1. PRC-barrel domain [50346] (4)
    uperfamily
73. beta-Trefoil [50352] (8)
  barrel, closed; n=6, S=12; and a hairpin triplet; meander
  duplication: has internal pseudo threefold symmetry
  1. Cytokine [50353] (2)
    uperfamily
  2. MIR domain [82109] (1)
    uperfamily
  3. Ricin B-like lectins [50370] (3)
    uperfamily
  4. Agglutinin [50382] (1)
    this superfamily is distinct from the ricin B-like lectin superfamily
    uperfamily
  5. STI-like [50386] (2)
    uperfamily
  6. Actin-crosslinking proteins [50405] (2)
    uperfamily
  7. DNA-binding protein LAG-1 (CSL) [110217] (1)
    contains rudiment hairpin triplet lacking one hairpin
    uperfamily
  8. AbfB domain [110221] (1)
    uperfamily
74. Reductase/isomerase/elongation factor common domain [50412] (4)
  barrel, closed; n=6, S=10; greek-key
  1. Riboflavin synthase domain-like [63380] (3)
    uperfamily
  2. Riboflavin kinase-like [82114] (2)
    uperfamily
  3. FucI/AraA C-terminal domain-like [50443] (2)
    uperfamily
  4. Translation proteins [50447] (6)
    uperfamily
75. Elongation factor/aminomethyltransferase common domain [50464] (2)
  barrel, closed; n=6, S=10; greek-key
  1. EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain [50465] (1)
    probably related to the second domain and its superfamiy by a circular permutation
    uperfamily
  2. Aminomethyltransferase beta-barrel domain [101790] (1)
    uperfamily
76. Split barrel-like [50474] (3)
  barrel; n=6, S=10; greek-key
  1. FMN-binding split barrel [50475] (4)
    related to the ferredoxin reductase-like FAD-binding domain
    uperfamily
  2. PilZ domain-like [141371] (2)
    uperfamily
  3. YkvR-like [159173] (1)
    provisional classification, pending better resolution structures
77. Phage tail proteins [69278] (1)
  core: barrel; n=6, S=10; greek-key; topologically similar to the FMN-binding split barrel
  1. Phage tail proteins [69279] (3)
    uperfamily
78. Surface presentation of antigens (SPOA) [101800] (1)
  segment-swapped dimer forming two identical conjoint barrels (n=6, S=10) topologically similar to the FMN-binding split barrel
  1. Surface presentation of antigens (SPOA) [101801] (1)
    uperfamily
79. FMT C-terminal domain-like [50485] (1)
  barrel, open; n*=6, S*=10; greek-key
  1. FMT C-terminal domain-like [50486] (2)
    uperfamily
80. Trypsin-like serine proteases [50493] (1)
  barrel, closed; n=6, S=8; greek-key
  duplication: consists of two domains of the same fold
  1. Trypsin-like serine proteases [50494] (4)
    uperfamily
81. Replicase NSP9 [101815] (1)
  barrel; n=6, S=8, greek-key; similar to one trypsin-like protease barrel
  1. Replicase NSP9 [101816] (1)
    uperfamily
82. mu transposase, C-terminal domain [50609] (1)
  barrel; n=6, S=8, greek-key
  1. mu transposase, C-terminal domain [50610] (1)
    uperfamily
83. Domain of alpha and beta subunits of F1 ATP synthase-like [50614] (3)
  barrel, closed; n=6, S=8; greek-key
  1. N-terminal domain of alpha and beta subunits of F1 ATP synthase [50615] (1)
    uperfamily
  2. Alanine racemase C-terminal domain-like [50621] (2)
    the barrel is decorated with additional structures
    uperfamily
  3. Aminopeptidase/glucanase lid domain [101821] (1)
    uperfamily
84. Small protein B (SmpB) [74981] (1)
  barrel, closed; n=6, S=8, greek-key, partial similarity to the OB-fold
  1. Small protein B (SmpB) [74982] (1)
    uperfamily
85. Acid proteases [50629] (1)
  barrel, closed; n=6, S=10, complex topology
  1. Acid proteases [50630] (3)
    uperfamily
86. ValRS/IleRS/LeuRS editing domain [50676] (1)
  core: barrel, closed; n=6, S=8; topology is similar to that of the acid proteases barrel
  1. ValRS/IleRS/LeuRS editing domain [50677] (1)
    uperfamily
87. Urease metallochaperone UreE, N-terminal domain [69286] (1)
  barrel, closed; n=6, S=8; a crossover loop topology
  1. Urease metallochaperone UreE, N-terminal domain [69287] (1)
    uperfamily
88. Double psi beta-barrel [50684] (2)
  barrel, closed; n=6, S=10; complex topology with crossover (psi) loops
  1. Barwin-like endoglucanases [50685] (4)
    uperfamily
  2. ADC-like [50692] (3)
    uperfamily
89. Ribosomal protein L25-like [50714] (1)
  barrel, closed; n=6, S=10; complex topology
  1. Ribosomal protein L25-like [50715] (2)
    uperfamily
90. Core binding factor beta, CBF [50722] (1)
  barrel, closed; n=6, S=10; meander; capped at both ends by alpha-helices
  1. Core binding factor beta, CBF [50723] (1)
    uperfamily
91. NifT/FixU barrel-like [159202] (1)
  barrel, closed, n=6, S=10; meander
  1. NifT/FixU-like [159203] (1)
92. PH domain-like barrel [50728] (2)
  barrel, partly opened; n*=6, S*=12; meander; capped by an alpha-helix
  1. PH domain-like [50729] (13)
    uperfamily
  2. PA2021-like [141447] (1)
    prokaryotiic proteins of PH domain-like fold lacking the N-terminal strand
    uperfamily
93. Transcription factor IIA (TFIIA), beta-barrel domain [50783] (1)
  barrel, closed; n=6, S=12; mixed beta-sheet
  1. Transcription factor IIA (TFIIA), beta-barrel domain [50784] (1)
    dimer of non-identical beta-sheet domains
    uperfamily
94. Hcp1-like [141451] (1)
  barrel, closed; n=6, S=12; contains extra, non-barrel strand 7 at the C-terminus
  1. Hcp1-like [141452] (1)
    probable biological unit is a ring-like hexamer containing a 24-stranded beta-barrel made of the subunit beta-sheets
    uperfamily
95. YopT-like [159221] (1)
  beta-sheet barrel, closed, n=6, S=12, capped at both ends by helices; intertwined dimer of beta-alpha-beta(2) subinits;
  1. YopT-like [159222] (1)
96. Herpes virus serine proteinase, assemblin [50788] (1)
  core: barrel, closed; n=7, S=8; complex topology
  1. Herpes virus serine proteinase, assemblin [50789] (1)
    uperfamily
97. PK beta-barrel domain-like [50799] (1)
  barrel, closed; n=7, S=10; complex topology
  1. PK beta-barrel domain-like [50800] (2)
    uperfamily
98. XRCC4, N-terminal domain [50808] (1)
  barrel, closed; n=7, S=10; order: 1234765; strands 1 and 5 are parallel to each other
  1. XRCC4, N-terminal domain [50809] (1)
    an HTH motif connects strands 4 and 5
    uperfamily
99. HesB-like domain [89359] (1)
  barrel, closed; n=7, S=10; complex topology
  1. HesB-like domain [89360] (1)
    uperfamily
100. Bacterial fluorinating enzyme, C-terminal domain [101851] (1)
  barrel, closed; n=7, S=10; greek-key topology; one overside connection
  1. Bacterial fluorinating enzyme, C-terminal domain [101852] (1)
    uperfamily
101. SPOC domain-like [100938] (1)
  barrel, closed; n=7, S=10; complex topology
  1. SPOC domain-like [100939] (3)
    uperfamily
102. BH3618-like [141456] (1)
  barrel, closed; n=7, S=10; meander
  1. BH3618-like [141457] (1)
    uperfamily
103. FAS1 domain [82152] (1)
  core: barrel, closed; n=7, S=12; meander
  1. FAS1 domain [82153] (1)
    uperfamily
104. Lipocalins [50813] (1)
  barrel, closed or opened; n=8, S=12; meander
  1. Lipocalins [50814] (9)
    bind hydrophobic ligands in their interior
    uperfamily
105. Streptavidin-like [50875] (8)
  barrel, closed; n=8, S=10; meander
  1. Avidin/streptavidin [50876] (1)
    uperfamily
  2. beta-Barrel protease inhibitors [50882] (2)
    uperfamily
  3. D-aminopeptidase, middle and C-terminal domains [50886] (1)
    uperfamily
  4. Quinohemoprotein amine dehydrogenase A chain, domain 3 [69298] (1)
    uperfamily
  5. Dipeptidyl peptidase I (cathepsin C), exclusion domain [75001] (1)
    uperfamily
  6. YceI-like [101874] (1)
    uperfamily
  7. Extracellular hemoglobin linker subunit, receptor domain [141480] (1)
    uperfamily
  8. YdhA-like [141488] (1)
    uperfamily
106. FomD barrel-like [159233] (1)
  barrel, closed; n=8, S=12; meander; similar topology to the AOC barrel-like fold (reversed to the lipocalin barrel topology)
  1. FomD-like [159234] (1)
107. AOC barrel-like [141492] (2)
  barrel, closed; n=8, S=10; meander; mirrored (reversed) topology to the Spreptavidin-like and Lipocalin-like folds
  1. Allene oxide cyclase-like [141493] (1)
    uperfamily
  2. SO1590-like [159238] (1)
108. AttH-like [159244] (1)
  duplication: two flattened beta-barrels of lipocalin-like topology are orthogonally packed with a pseudo twofold symmetry
  1. AttH-like [159245] (1)
109. Cyclophilin-like [50890] (1)
  barrel, closed; n=8, S=10; complex topology
  1. Cyclophilin-like [50891] (4)
    uperfamily
110. Oncogene products [50903] (1)
  barrel, closed; n=8, S=10; one overside connection
  1. Oncogene products [50904] (1)
    duplication: N- and C-terminal halves are related by pseudo dyad
    uperfamily
111. L,D-transpeptidase catalytic domain-like [141522] (1)
  barrel, closed; n=8, S=10; one overside connection
  1. L,D-transpeptidase catalytic domain-like [141523] (1)
    uperfamily
112. Sortase [63816] (1)
  barrel, closed; n=8, S=10; mixed sheet; two overside connections
  1. Sortase [63817] (1)
    uperfamily
113. PTSIIA/GutA-like [141529] (1)
  barrel, closed; n=8, S=12; mixed sheet; two overside connections; duplication: consists of two intertwinned structural repeats
  1. PTSIIA/GutA-like [141530] (1)
    uperfamily
114. Mannose 6-phosphate receptor domain [50910] (1)
  barrel, partly open; n*=8, S*=10; one psi loop
  1. Mannose 6-phosphate receptor domain [50911] (1)
    uperfamily
115. triple barrel [50915] (1)
  dimer of two non-identical subunits; forms two similar barrels, n=8, S=10 each, that are fused together with the formation of third barrel, n=6, S=8
  1. Rap30/74 interaction domains [50916] (1)
    uperfamily
116. 4-bladed beta-propeller [50922] (1)
  consists of four 4-stranded beta-sheet motifs; meander
  1. Hemopexin-like domain [50923] (1)
    uperfamily
117. 5-bladed beta-propeller [50933] (3)
  consists of five 4-stranded beta-sheet motifs; meander
  1. Tachylectin-2 [50934] (1)
    uperfamily
  2. Arabinanase/levansucrase/invertase [75005] (5)
    uperfamily
  3. Apyrase [101887] (1)
    distorted propeller with an alpha helix inserted between the second and third blades
    uperfamily
118. 6-bladed beta-propeller [50938] (11)
  consists of six 4-stranded beta-sheet motifs; meander
  1. Sialidases [50939] (2)
    uperfamily
  2. Soluble quinoprotein glucose dehydrogenase [50952] (1)
    uperfamily
  3. Thermostable phytase (3-phytase) [50956] (1)
    uperfamily
  4. TolB, C-terminal domain [50960] (1)
    uperfamily
  5. YWTD domain [63825] (1)
    uperfamily
  6. Calcium-dependent phosphotriesterase [63829] (3)
    uperfamily
  7. Tricorn protease N-terminal domain [69304] (1)
    possibly related to the second domain of tricorn protease (a distorted 7-bladed beta-propeller)
    uperfamily
  8. Fucose-specific lectin [89372] (1)
    uperfamily
  9. NHL repeat [101898] (1)
    uperfamily
  10. GyrA/ParC C-terminal domain-like [101904] (1)
    beta-pinwheel, a variant of beta-propeller fold; unlike an canonical beta-propeller, strands 1 and 4 of each four-strand repeat unit are in one blade whereas strands 2 and 3 are in the next blade
    uperfamily
  11. Kelch motif [117281] (1)
    uperfamily
119. 7-bladed beta-propeller [50964] (14)
  consists of seven 4-stranded beta-sheet motifs; meander
  1. Galactose oxidase, central domain [50965] (1)
    uperfamily
  2. YVTN repeat-like/Quinoprotein amine dehydrogenase [50969] (3)
    uperfamily
  3. Nitrous oxide reductase, N-terminal domain [50974] (1)
    uperfamily
  4. WD40 repeat-like [50978] (2)
    also contains 8-bladed propellers
    uperfamily
  5. RCC1/BLIP-II [50985] (2)
    two families are clearly related but differ by the number of strands per blade
    uperfamily
  6. Clathrin heavy-chain terminal domain [50989] (1)
    uperfamily
  7. Integrin alpha N-terminal domain [69318] (1)
    uperfamily
  8. Peptidase/esterase 'gauge' domain [50993] (2)
    uperfamily
  9. Tricorn protease domain 2 [69322] (1)
    distorted 7-bladed beta-propeller fold; possibly related to the N-terminal domain of tricorn protease (a 6-bladed beta-propeller)
    uperfamily
  10. 3-carboxy-cis,cis-mucoante lactonizing enzyme [75011] (1)
    uperfamily
  11. Putative isomerase YbhE [101908] (1)
    uperfamily
  12. Sema domain [101912] (1)
    irregular 7-bladed beta-propeller with a large insertion in the fifth blade
    uperfamily
  13. Oligoxyloglucan reducing end-specific cellobiohydrolase [110296] (1)
    duplication: # two beta-propeller domains are swapped with the N-terminal strands; similar domain arrangment to the Actin interacting protein 1 (scop_pr 89378)
    uperfamily
  14. Nucleoporin domain [117289] (1)
    uperfamily
120. 8-bladed beta-propeller [50997] (3)
  consists of eight 4-stranded beta-sheet motifs; meander
  also found in some members of the WD40-repeat superfamily
  1. Quinoprotein alcohol dehydrogenase-like [50998] (1)
    uperfamily
  2. C-terminal (heme d1) domain of cytochrome cd1-nitrite reductase [51004] (1)
    uperfamily
  3. DPP6 N-terminal domain-like [82171] (1)
    uperfamily
121. Glycosyl hydrolase domain [51010] (1)
  folded sheet; greek-key
  1. Glycosyl hydrolase domain [51011] (5)
    this domain is C-terminal to the catalytic beta/alpha barrel domain
    uperfamily
122. WW domain-like [51044] (3)
  core: 3-stranded meander beta-sheet
  1. WW domain [51045] (1)
    uperfamily
  2. Carbohydrate binding domain [51055] (1)
    uperfamily
  3. Pym (Within the bgcn gene intron protein, WIBG), N-terminal domain [101931] (1)
    uperfamily
123. Head domain of nucleotide exchange factor GrpE [51063] (1)
  small mixed beta-sheet, 4 "generalized" strands
  1. Head domain of nucleotide exchange factor GrpE [51064] (1)
    uperfamily
124. Coronavirus RNA-binding domain [110303] (1)
  coiled antiparallel beta-sheet of 5 strands, order 51324; complex topology, crossing loops
  1. Coronavirus RNA-binding domain [110304] (1)
    uperfamily
125. Ribonuclease domain of colicin E3 [63839] (1)
  twisted meander beta-sheet of 6 strands
  1. Ribonuclease domain of colicin E3 [63840] (1)
    uperfamily
126. NAC domain [101940] (1)
  core: twisted 7-stranded beta-sheet (half-barrel)
  1. NAC domain [101941] (1)
    uperfamily
127. At5g01610-like [141561] (1)
  contains large meander beta-sheet bent into a scoop-like shape
  1. At5g01610-like [141562] (1)
    uperfamily
128. Carbonic anhydrase [51068] (1)
  single sheet; 10 strands
  1. Carbonic anhydrase [51069] (1)
    uperfamily
129. LolA-like prokaryotic lipoproteins and lipoprotein localization factors [89391] (1)
  11 stranded sheet partly folded in a corner-like structure filled with a few short helices
  1. Prokaryotic lipoproteins and lipoprotein localization factors [89392] (3)
    uperfamily
130. YmcC-like [159269] (1)
  12-stranded meander beta-sheet, folded into a deformed beta-barrel; topological similarity to the LolA-like fold (scop_cf 89391)
  1. YmcC-like [159270] (1)
131. Spiral beta-roll [159274] (1)
  a large 15-stranded beta-sheet rolled about a single helix core; overlapping edges form a sandwich-like structure; topological similarity to the LolA-like fold (scop_cf 89391)
  1. PA1994-like [159275] (1)
132. Bacteriochlorophyll A protein [51080] (1)
  single sheet; 16 strands; meander
  1. Bacteriochlorophyll A protein [51081] (1)
    uperfamily
133. open-sided beta-meander [51086] (2)
  single sheet formed by beta-hairpin repeats; exposed on both sides in the middle
  1. Outer surface protein [51087] (1)
    21 stranded sheet partly folded upon itself at the ends
    uperfamily
  2. Histone H3 K4-specific methyltransferase SET7/9 N-terminal domain [82185] (1)
    11+ stranded sheet partly folded upon itself at the C-end
    uperfamily
134. beta-Prism I [51091] (3)
  consists of 3 4-stranded sheets; strands are parallel to the 3-fold axis
  duplication: has internal pseudo threefold symmetry
  1. Vitelline membrane outer protein-I (VMO-I) [51092] (1)
    uperfamily
  2. delta-Endotoxin (insectocide), middle domain [51096] (1)
    uperfamily
  3. Mannose-binding lectins [51101] (1)
    uperfamily
135. beta-Prism II [51109] (1)
  consists of 3 4-stranded sheets; strands are perpendicular to the 3-fold axis
  duplication: consists of two domains of this fold
  1. alpha-D-mannose-specific plant lectins [51110] (1)
    uperfamily
136. Single-stranded right-handed beta-helix [51125] (8)
  superhelix turns are made of parallel beta-strands and (short) turns
  1. beta-Roll [51120] (1)
    superhelix turns are made of two short strands each
    uperfamily
  2. Pectin lyase-like [51126] (11)
    superhelix turns are made of 3 strands each
    uperfamily
  3. Insect cysteine-rich antifreeze protein [51156] (1)
    superhelix turns are made of two short strands each
    uperfamily
  4. Cell-division inhibitor MinC, C-terminal domain [63848] (1)
    superhelix turns are made of three short strands each
    uperfamily
  5. Alpha subunit of glutamate synthase, C-terminal domain [69336] (1)
    uperfamily
  6. C-terminal domain of adenylylcyclase associated protein [69340] (1)
    superhelix turns are made of two strands each
    uperfamily
  7. Stabilizer of iron transporter SufD [101960] (1)
    superhelix turns are made of two very long strands each
    uperfamily
  8. Pentapeptide repeat-like [141571] (1)
    superhelix turns are made of four short strands each; duplication: the sequence pentapeptide repeats correspond to individual strands
    uperfamily
137. Single-stranded left-handed beta-helix [51160] (4)
  superhelix turns are made of parallel beta-strands and (short) turns
  1. Trimeric LpxA-like enzymes [51161] (8)
    superhelical turns are made of three short strands; duplication: the sequence hexapeptide repeats correspond to individual strands
    uperfamily
  2. An insect antifreeze protein [51177] (1)
    superhelical turns are made of three short strands
    uperfamily
  3. Adhesin YadA, collagen-binding domain [101967] (1)
    superhelical turns are made of two short strands
    uperfamily
  4. Guanosine diphospho-D-mannose pyrophosphorylase/mannose-6-phosphate isomerase linker domain [159283] (1)
    probable rudiment form of the LpxA-like hexapeptide domain
138. Double-stranded beta-helix [51181] (7)
  one turn of helix is made by two pairs of antiparallel strands linked with short turns
  has appearance of a sandwich of distinct architecture and jelly-roll topology
  1. RmlC-like cupins [51182] (24)
    uperfamily
  2. Clavaminate synthase-like [51197] (13)
    Iron and ketoglutarate-dependent enzymes; elaborated version of this common fold
    uperfamily
  3. cAMP-binding domain-like [51206] (3)
    uperfamily
  4. Regulatory protein AraC [51215] (1)
    uperfamily
  5. Thiamin pyrophosphokinase, substrate-binding domain [63862] (1)
    uperfamily
  6. Calcium ATPase, transduction domain A [81653] (1)
    a distorted variant of double-helix
    uperfamily
  7. TRAP-like [51219] (2)
    shorter variant of double-helix; assembles in large ring-like structures containing from 9 to 11 domains
    uperfamily
139. Triple-stranded beta-helix [69348] (1)
  (homo)trimer; each chain donates 3 beta-strands per turn of the helix
  1. Phage fibre proteins [69349] (5)
    uperfamily
140. Triple beta-spiral [51224] (1)
  trimer formed by the interlocking beta-hairpin repeat units
  1. Fibre shaft of virus attachment proteins [51225] (2)
    uperfamily
141. Trimeric adhesin [101998] (1)
  trimer; contains two different beta-prism-like domains connected by an linker subdomain of less regular structure
  1. Trimeric adhesin [101999] (1)
    uperfamily
142. beta-hairpin stack [69359] (1)
  Trp-rich beta-hairpin repeat units form helical structures of 3 units per turn
  1. Cell wall binding repeat [69360] (1)
    uperfamily
143. Barrel-sandwich hybrid [51229] (4)
  sandwich of half-barrel shaped beta-sheets
  1. Single hybrid motif [51230] (1)
    7 to 8 strands in 2 beta-sheets
    uperfamily
  2. Rudiment single hybrid motif [51246] (2)
    uperfamily
  3. Duplicated hybrid motif [51261] (2)
    half-barrel sheet of 8 strands sandwiched with two 3-stranded sheets
    uperfamily
  4. Ribosomal L27 protein-like [110324] (2)
    rudiment single hybrid fold with a permuted topology
    uperfamily
144. beta-clip [51268] (7)
  double-stranded ribbon sharply bent in two places; the ribbon ends form incomplete barrel; jelly-roll
  1. AFP III-like domain [51269] (1)
    duplication: consists of two structural repeats related by pseudo dyad
    uperfamily
  2. SET domain [82199] (3)
    duplication: the core is composed of two structural repeats similar to (circularly permuted) repeats of AFPIII
    also contains a substrate-binding alpha+beta subdomain inserted in the core
    uperfamily
  3. Head decoration protein D (gpD, major capsid protein D) [51274] (1)
    uperfamily
  4. Urease, beta-subunit [51278] (1)
    uperfamily
  5. MoeA C-terminal domain-like [63867] (1)
    uperfamily
  6. dUTPase-like [51283] (1)
    forms tight trimer through an additional beta-sheet in each subunit
    subunit beta-sheets are orthogonally packed around the three-fold axis
    uperfamily
  7. Tlp20, baculovirus telokin-like protein [51289] (1)
    similar to dUTPase in fold and trimeric assembly
    uperfamily
145. PheT/TilS domain [56036] (1)
  core: 3 layers; contains beta-sandwich of unusual topology
  1. PheT/TilS domain [56037] (2)
    contains putative tRNA-binding structural motif
    uperfamily
146. C-terminal autoproteolytic domain of nucleoporin nup98 [82214] (1)
  multisheet protein with a mixture of beta-sandwich and beta-prism features
  1. C-terminal autoproteolytic domain of nucleoporin nup98 [82215] (1)
    uperfamily
147. Pseudo beta-prism [141657] (1)
  beta-sandwich with one regular beta-sheet and the other beta-sheet bent in the middle with a set of aligned beta-bulges
  1. Bacteriophage trimeric proteins domain [141658] (2)
    found in phage proteins that form trimers, but is not involved in the trimerisation
    uperfamily
148. SARS ORF9b-like [141665] (1)
  complex dimeric fold with three intersubunit beta-sheets packed around a single core
  1. 'SARS ORF9b-like [141666] (1)
    uperfamily
149. Adsorption protein p2 [89427] (1)
  multisheet protein containing partial beta-propeller and beta-sandwich regions
  1. Adsorption protein p2 [89428] (1)
    uperfamily
150. Baseplate structural protein gp8 [89432] (1)
  multisheet protein with a mixture of beta-sandwich and beta-barrel features
  1. Baseplate structural protein gp8 [89433] (1)
    uperfamily
151. Hedgehog/intein (Hint) domain [51293] (1)
  complex fold made of five beta-hairpin units and a b-ribbon arc
  1. Hedgehog/intein (Hint) domain [51294] (2)
    duplication: contains two intertwined structural repeats
    uperfamily
152. LexA/Signal peptidase [51305] (1)
  complex fold made of several coiled beta-sheets; contains an SH3-like barrel
  1. LexA/Signal peptidase [51306] (2)
    uperfamily
153. Cloacin translocation domain [69368] (1)
  complex fold made of several coiled beta-sheets
  1. Cloacin translocation domain [69369] (1)
    uperfamily
154. Mss4-like [51315] (1)
  complex fold made of several coiled beta-sheets
  1. Mss4-like [51316] (4)
    duplication: tandem repeat of two similar structural motifs
    uperfamily
155. Cyanovirin-N [51321] (1)
  complex fold
  1. Cyanovirin-N [51322] (1)
    duplication: tandem repeat of two homologous motifs made three stranded beta-sheet and beta-hairpins
    uperfamily
156. Tp47 lipoprotein, N-terminal domain [82219] (1)
  complex fold; consists of two intertwined subdomains
  1. Tp47 lipoprotein, N-terminal domain [82220] (1)
    uperfamily
157. Methuselah ectodomain [63876] (1)
  complex fold
  1. Methuselah ectodomain [63877] (1)
    duplication: contains two similar sub domains connected by a structured linker
    uperfamily
158. Head-binding domain of phage P22 tailspike protein [51326] (1)
  complex fold made of bifurcated and partly folded beta-sheet
  1. Head-binding domain of phage P22 tailspike protein [51327] (1)
    uperfamily
159. E2 regulatory, transactivation domain [51331] (1)
  complex fold made of bifurcated and coiled beta-sheets
  1. E2 regulatory, transactivation domain [51332] (1)
    uperfamily
160. MoeA N-terminal region -like [63881] (1)
  complex fold made of bifurcated and coiled b-sheets
  1. MoeA N-terminal region -like [63882] (1)
    uperfamily
161. MOSC N-terminal domain-like [141672] (1)
  complex fold; comprises a beta-hairpin and a meander 3-stranded sheet packed against beta-barrel: closed, n=5, S=8; contains three short helices
  1. MOSC N-terminal domain-like [141673] (1)
    uperfamily
162. MAL13P1.257-like [141677] (1)
  complex fold; duplication: consists of two intertwinned structural repeats related by pseudo dyad
  1. MAL13P1.257-like [141678] (1)
    uperfamily
163. Composite domain of metallo-dependent hydrolases [51337] (1)
  pseudobarrel; mixed sheet of 7 strand folded upon itself and "buckled" by two beta-turns
  1. Composite domain of metallo-dependent hydrolases [51338] (11)
    this domain is interrupted by the catalytic beta/alpha barrel domain
    uperfamily
164. Epsilon subunit of F1F0-ATP synthase N-terminal domain [51343] (1)
  pseudobarrel: sandwich of two sheets packed at a positive interstrand angle and interconnected with many short turns
  1. Epsilon subunit of F1F0-ATP synthase N-terminal domain [51344] (1)
    uperfamily
165. N-terminal domain of MutM-like DNA repair proteins [81625] (1)
  pseudobarrel; capped on both ends by alpha-helices
  1. N-terminal domain of MutM-like DNA repair proteins [81624] (1)
    uperfamily
166. Hypothetical protein YojF [89441] (1)
  pseudobarrel; capped at one end by an alpha-helix
  1. Hypothetical protein YojF [89442] (1)
    uperfamily
167. DNA-binding pseudobarrel domain [101935] (1)
  core: barrel, open; n=7, S*=10; capped with helices at both ends; partial similarity to the AbrB/MazE/MraZ-like fold (scop_cf 89446)
  1. DNA-binding pseudobarrel domain [101936] (2)
    uperfamily
168. Double-split beta-barrel [89446] (2)
  pseudobarrel; capped on both ends by alpha-helices
  1. AbrB/MazE/MraZ-like [89447] (3)
    members of this superfamily are known or predicted to have DNA-binding function
    uperfamily
  2. AF2212/PG0164-like [141694] (2)
    six-stranded barrel, topologically similar to the Reductase/isomerase/elongation factor domain fold (scop_cf 50412)
    uperfamily
169. PUA domain-like [88696] (1)
  pseudobarrel; mixed folded sheet of 5 strands; order 13452; strand 1 and 3 are parallel to each other
  1. PUA domain-like [88697] (13)
    uperfamily
170. AXH domain [102030] (1)
  pseudobarrel; some similarity to OB-fold
  1. AXH domain [102031] (1)
    uperfamily
171. FimD N-terminal domain-like [141728] (1)
  pseudo barrel, capped by an alpha-helix; some topological similarity to the PRC-barrel domain (scop_sf 50346) and the N-terminal domain of Glutamine synthetase (scop_sf 54368)
  1. FimD N-terminal domain-like [141729] (1)
    uperfamily
172. HisI-like [141733] (1)
  pseudo barrel, capped by an alpha-helix; contains a beta-triangle structure on one side; some topological similarity to the Ribosomal protein L25-like fold (scop_cf 50714) and the N-terminal domain of Glutamine synthetase (scop_sf 54368)
  1. HisI-like [141734] (1)
    uperfamily
173. MFPT repeat-like [141738] (1)
  consists of two similar pseudo barrel subdomains with structural similarity to a circularly permuted SAND domain (scop_fa 63764)
  1. MFPT repeat-like [141739] (1)
    uperfamily
174. P-domain of calnexin/calreticulin [63886] (1)
  non-globular proline-rich hairpin
  1. P-domain of calnexin/calreticulin [63887] (1)
    uperfamily
Alpha and beta proteins (a/b) [51349] (147)
Mainly parallel beta sheets (beta-alpha-beta units)
1. TIM beta/alpha-barrel [51350] (33)
  contains parallel beta-sheet barrel, closed; n=8, S=8; strand order 12345678
  the first seven superfamilies have similar phosphate-binding sites
  1. Triosephosphate isomerase (TIM) [51351] (1)
    uperfamily
  2. Ribulose-phoshate binding barrel [51366] (6)
    uperfamily
  3. Thiamin phosphate synthase [51391] (1)
    uperfamily
  4. Pyridoxine 5'-phosphate synthase [63892] (1)
    uperfamily
  5. FMN-linked oxidoreductases [51395] (1)
    uperfamily
  6. Inosine monophosphate dehydrogenase (IMPDH) [51412] (1)
    The phosphate moiety of substrate binds in the 'common' phosphate-binding site
    uperfamily
  7. PLP-binding barrel [51419] (2)
    circular permutation of the canonical fold: begins with an alpha helix and ends with a beta-strand
    uperfamily
  8. NAD(P)-linked oxidoreductase [51430] (1)
    uperfamily
  9. (Trans)glycosidases [51445] (14)
    uperfamily
  10. Metallo-dependent hydrolases [51556] (18)
    the beta-sheet barrel is similarly distorted and capped by a C-terminal helix
    has transition metal ions bound inside the barrel
    uperfamily
  11. Aldolase [51569] (8)
    Common fold covers whole protein structure
    uperfamily
  12. Enolase C-terminal domain-like [51604] (2)
    binds metal ion (magnesium or manganese) in conserved site inside barrel
    N-terminal alpha+beta domain is common to this superfamily
    uperfamily
  13. Phosphoenolpyruvate/pyruvate domain [51621] (7)
    uperfamily
  14. Malate synthase G [51645] (1)
    uperfamily
  15. RuBisCo, C-terminal domain [51649] (1)
    uperfamily
  16. Xylose isomerase-like [51658] (7)
    different families share similar but non-identical metal-binding sites
    uperfamily
  17. Bacterial luciferase-like [51679] (4)
    consists of clearly related families of somewhat different folds
    uperfamily
  18. Nicotinate/Quinolinate PRTase C-terminal domain-like [51690] (2)
    incomplete beta/alpha barrel with parallel beta-sheet of 7 strands
    uperfamily
  19. PLC-like phosphodiesterases [51695] (3)
    uperfamily
  20. Cobalamin (vitamin B12)-dependent enzymes [51703] (4)
    uperfamily
  21. tRNA-guanine transglycosylase [51713] (1)
    uperfamily
  22. Dihydropteroate synthetase-like [51717] (2)
    uperfamily
  23. UROD/MetE-like [51726] (2)
    uperfamily
  24. FAD-linked oxidoreductase [51730] (2)
    distinct cofactor-binding mode from both FMN- and NAD(P)-linked TIM-barrel oxidoreductases; families are related by a circular permutation
    uperfamily
  25. Monomethylamine methyltransferase MtmB [75098] (1)
    uperfamily
  26. Homocysteine S-methyltransferase [82282] (1)
    uperfamily
  27. (2r)-phospho-3-sulfolactate synthase ComA [102110] (1)
    uperfamily
  28. Radical SAM enzymes [102114] (3)
    common Fe-S cluster and SAM binding sites are embedded into complete or incomplete beta/alpha-barrel
    uperfamily
  29. GlpP-like [110391] (1)
    uperfamily
  30. CutC-like [110395] (1)
    uperfamily
  31. ThiG-like [110399] (1)
    shares the common phosphate-binding site with other superfamilies
    uperfamily
  32. TM1631-like [117396] (1)
    uperfamily
  33. EAL domain-like [141868] (1)
    variant of the beta/alpha-barrel fold with strand 1 being antiparallel to the rest
    uperfamily
2. NAD(P)-binding Rossmann-fold domains [51734] (1)
  core: 3 layers, a/b/a; parallel beta-sheet of 6 strands, order 321456
  The nucleotide-binding modes of this and the next two folds/superfamilies are similar
  1. NAD(P)-binding Rossmann-fold domains [51735] (12)
    uperfamily
3. FAD/NAD(P)-binding domain [51904] (1)
  core: 3 layers, b/b/a; central parallel beta-sheet of 5 strands, order 32145; top antiparallel beta-sheet of 3 strands, meander
  1. FAD/NAD(P)-binding domain [51905] (8)
    uperfamily
4. Nucleotide-binding domain [51970] (1)
  3 layers: a/b/a; parallel beta-sheet of 5 strands, order 32145; Rossmann-like
  1. Nucleotide-binding domain [51971] (3)
    this superfamily shares the common nucleotide-binding site with and provides a link between the Rossmann-fold NAD(P)-binding and FAD/NAD(P)-binding domains
    uperfamily
5. MurCD N-terminal domain [51983] (1)
  3 layers: a/b/a; parallel beta-sheet of 5 strands, order 32145; incomplete Rossmann-like fold; binds UDP group
  1. MurCD N-terminal domain [51984] (1)
    uperfamily
6. 7-stranded beta/alpha barrel [51988] (3)
  variant of beta/alpha barrel; parallel beta-sheet barrel, closed, n=7, S=8; strand order 1234567; some members may have fewer strands
  1. Glycosyl hydrolases family 6, cellulases [51989] (1)
    uperfamily
  2. PHP domain-like [89550] (2)
    uperfamily
  3. Glycoside hydrolase/deacetylase [88713] (8)
    in the different families beta-barrels are similarly distorted but may vary in the number of strands
    uperfamily
7. PFL-like glycyl radical enzymes [51997] (1)
  contains: barrel, closed; n=10, S=10; accommodates a hairpin loop inside the barrel
  1. PFL-like glycyl radical enzymes [51998] (5)
    duplication: the N- and C-terminal halves have similar topologies
    uperfamily
8. The "swivelling" beta/beta/alpha domain [52008] (10)
  3 layers: b/b/a; the central sheet is parallel, and the other one is antiparallel; there are some variations in topology
  this domain is thought to be mobile in most multi-domain proteins known to contain it
  1. Phosphohistidine domain [52009] (2)
    contains barrel, closed, n=7, S=10
    uperfamily
  2. RraA-like [89562] (1)
    structural similarity and possible distant homology to the phosphohistidine domain of pyruvate phosphate dikinase
    uperfamily
  3. Putative cyclase [102198] (1)
    contains mixed beta-sheet barrel, closed n=7, S=10
    uperfamily
  4. LeuD/IlvD-like [52016] (3)
    contains mixed beta-sheet barrel, closed n=7, S=10
    uperfamily
  5. Carbamoyl phosphate synthetase, small subunit N-terminal domain [52021] (1)
    uperfamily
  6. Swiveling domain of dehydratase reactivase alpha subunit [82317] (1)
    uperfamily
  7. PA domain [52025] (1)
    uperfamily
  8. GroEL apical domain-like [52029] (2)
    uperfamily
  9. FumA C-terminal domain-like [117457] (1)
    uperfamily
  10. LD-carboxypeptidase A C-terminal domain-like [141986] (1)
    uperfamily
9. Barstar-like [52037] (2)
  2 layers, a/b; parallel beta-sheet of 3 strands, order 123
  1. Barstar-related [52038] (1)
    uperfamily
  2. Ribosomal protein L32e [52042] (1)
    uperfamily
10. MurF and HprK N-domain-like [63417] (2)
  core: 3 layers, a/b/a; parallel beta-sheet of 4 strands, order 1234; structural similarity of the MurF and HprK extends beyond the core.
  1. MurE/MurF N-terminal domain [63418] (1)
    binds UDP group
    uperfamily
  2. HprK N-terminal domain-like [75138] (2)
    probable phosphatase
    uperfamily
11. Leucine-rich repeat, LRR (right-handed beta-alpha superhelix) [52046] (3)
  2 curved layers, a/b; parallel beta-sheet; order 1234...N; there are sequence similarities between different superfamilies
  1. RNI-like [52047] (3)
    regular structure consisting of similar repeats
    uperfamily
  2. L domain-like [52058] (8)
    less regular structure consisting of variable repeats
    uperfamily
  3. Outer arm dynein light chain 1 [52075] (1)
    (beta-beta-alpha)n superhelix
    uperfamily
12. Ribosomal proteins L15p and L18e [52079] (1)
  core: three turns of irregular (beta-beta-alpha)n superhelix
  1. Ribosomal proteins L15p and L18e [52080] (1)
    uperfamily
13. SpoIIaa-like [52086] (2)
  core: 4 turns of a (beta-alpha)n superhelix
  1. CRAL/TRIO domain [52087] (1)
    uperfamily
  2. SpoIIaa-like [52091] (2)
    uperfamily
14. ClpP/crotonase [52095] (1)
  core: 4 turns of (beta-beta-alpha)n superhelix
  1. ClpP/crotonase [52096] (4)
    uperfamily
15. BRCT domain [52112] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 2134
  1. BRCT domain [52113] (5)
    Pfam 00533
    uperfamily
16. Lumazine synthase [52120] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 2134
  1. Lumazine synthase [52121] (1)
    uperfamily
17. Uracil-DNA glycosylase-like [52140] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 2134
  1. Uracil-DNA glycosylase-like [52141] (4)
    uperfamily
18. Creatininase [102214] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 2134
  1. Creatininase [102215] (1)
    uperfamily
19. DNA polymerase III psi subunit [102219] (1)
  3 layers, a/b/a; parallel beta-sheet of 4 strands, order 2134
  1. DNA polymerase III psi subunit [102220] (1)
    uperfamily
20. Initiation factor IF2/eIF5b, domain 3 [52155] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 2134
  1. Initiation factor IF2/eIF5b, domain 3 [52156] (1)
    uperfamily
21. Aminoacid dehydrogenase-like, N-terminal domain [53222] (1)
  core: 3 layers: a/b/a; parallel beta-sheet of 4 strands; 2134
  1. Aminoacid dehydrogenase-like, N-terminal domain [53223] (5)
    uperfamily
22. Toprim domain [110454] (1)
  3 layers, a/b/a; parallel beta-sheet of 4 strands, order 2134
  1. Toprim domain [110455] (1)
    this domain is also present in several multidomain proteins that are not split in scop yet: scop_sf 56712, scop_sf 56719, scop_sf 56726, scop_sf 56731
    uperfamily
23. AtpF-like [159467] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 2134
  1. AtpF-like [159468] (1)
24. Ribosomal protein L13 [52160] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 3214
  1. Ribosomal protein L13 [52161] (1)
    uperfamily
25. Ribosomal protein L4 [52165] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 4 strands, order 1423
  1. Ribosomal protein L4 [52166] (1)
    uperfamily
26. Nqo1 FMN-binding domain-like [142018] (1)
  3 layers, a/b/a; parallel beta-sheet of 4 strands, order 3214
  1. Nqo1 FMN-binding domain-like [142019] (1)
    uperfamily
27. Flavodoxin-like [52171] (15)
  3 layers, a/b/a; parallel beta-sheet of 5 strand, order 21345
  1. CheY-like [52172] (7)
    uperfamily
  2. Toll/Interleukin receptor TIR domain [52200] (1)
    uperfamily
  3. Hypothetical protein MTH538 [52206] (1)
    uperfamily
  4. Succinyl-CoA synthetase domains [52210] (1)
    uperfamily
  5. Flavoproteins [52218] (8)
    uperfamily
  6. Cobalamin (vitamin B12)-binding domain [52242] (1)
    uperfamily
  7. N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE) [52255] (1)
    uperfamily
  8. SGNH hydrolase [52266] (9)
    uperfamily
  9. Beta-D-glucan exohydrolase, C-terminal domain [52279] (1)
    uperfamily
  10. Formate/glycerate dehydrogenase catalytic domain-like [52283] (3)
    uperfamily
  11. Type II 3-dehydroquinate dehydratase [52304] (1)
    uperfamily
  12. N-(deoxy)ribosyltransferase-like [52309] (3)
    there are similar active site architectures as well as the catalytic mechanisms of functionally characterised members
    uperfamily
  13. Ribosomal protein S2 [52313] (1)
    fold elaborated with additional structures
    uperfamily
  14. Precorrin-8X methylmutase CbiC/CobH [63965] (1)
    fold elaborated with additional structures
    uperfamily
  15. Class I glutamine amidotransferase-like [52317] (9)
    conserved positions of the oxyanion hole and catalytic nucleophile; different constituent families contain different additional structures
    uperfamily
28. Methylglyoxal synthase-like [52334] (1)
  3 layers, a/b/a; parallel beta-sheet of 5 strands, order 32145
  1. Methylglyoxal synthase-like [52335] (3)
    contains a common phosphate-binding site
    uperfamily
29. Ferredoxin reductase-like, C-terminal NADP-linked domain [52342] (1)
  3 layers, a/b/a; parallel beta-sheet of 5 strands, order 32145
  1. Ferredoxin reductase-like, C-terminal NADP-linked domain [52343] (5)
    binds NADP differently than classical Rossmann-fold
    N-terminal FAD-linked domain contains (6,10) barrel
    uperfamily
30. Adenine nucleotide alpha hydrolase-like [52373] (3)
  core: 3 layers, a/b/a ; parallel beta-sheet of 5 strands, order 32145
  1. Nucleotidylyl transferase [52374] (5)
    uperfamily
  2. Adenine nucleotide alpha hydrolases-like [52402] (6)
    share similar mode of ligand (Adenosine group) binding
    can be subdivided into two group with closer relationships within each group than between the groups; the first three families form one group whereas the last two families form the other group
    uperfamily
  3. UDP-glucose/GDP-mannose dehydrogenase C-terminal domain [52413] (1)
    uperfamily
31. Nucleoside phosphorylase/phosphoribosyltransferase catalytic domain [52417] (1)
  3 layers: a/b/a; parallel beta-sheet of 5 strands, order 32145; Rossmann-like
  1. Nucleoside phosphorylase/phosphoribosyltransferase catalytic domain [52418] (1)
    uperfamily
32. Cryptochrome/photolyase, N-terminal domain [52424] (1)
  3 layers: a/b/a; parallel beta-sheet of 5 strands, order 32145; Rossmann-like
  1. Cryptochrome/photolyase, N-terminal domain [52425] (1)
    uperfamily
33. DsrEFH-like [75168] (1)
  3 layers: a/b/a, core: parallel beta-sheet of 5 strands, order 43215
  1. DsrEFH-like [75169] (2)
    uperfamily
34. PIN domain-like [88722] (1)
  3 layers, a/b/a; core: parallel beta-sheet of 5 strands, order 32145
  1. PIN domain-like [88723] (2)
    uperfamily
35. Ribose/Galactose isomerase RpiB/AlsB [89622] (1)
  3 layers: a/b/a, core: parallel beta-sheet of 5 strands, order 21354; topological similarity to a part of the arginase/deacetylase fold
  1. Ribose/Galactose isomerase RpiB/AlsB [89623] (1)
    uperfamily
36. EreA/ChaN-like [159500] (1)
  Core: 3 layers: a/b/a; parallel beta-sheet of 5 strands, order:51423;
  1. EreA/ChaN-like [159501] (3)
    there are four conserved residues in the putative active site: two His and two Glu
37. alpha/beta knot [75216] (1)
  core: 3 layers: a/b/a, parallel beta-sheet of 5 strands, order 21435; contains a deep trefoil knot
  1. alpha/beta knot [75217] (8)
    known or predicted SAM-dependent methytransferases including the SPOUT 'sequence' superfamily
    all known members have dimeric structures
    uperfamily
38. PreATP-grasp domain [52439] (1)
  3 layers: a/b/a; parallel or mixed beta-sheet of 4 to 6 strands
  possible rudiment form of Rossmann-fold domain
  1. PreATP-grasp domain [52440] (8)
    precedes the ATP-grasp domain common to all superfamily members, can contain a substrate-binding function
    uperfamily
39. DHS-like NAD/FAD-binding domain [52466] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456; Rossmann-like
  1. DHS-like NAD/FAD-binding domain [52467] (6)
    binds cofactor molecules in the opposite direction than classical Rossmann fold
    uperfamily
40. Tubulin nucleotide-binding domain-like [52489] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456
  1. Tubulin nucleotide-binding domain-like [52490] (1)
    uperfamily
41. Isochorismatase-like hydrolases [52498] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456
  1. Isochorismatase-like hydrolases [52499] (1)
    uperfamily
42. Dipeptide transport protein [63991] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456; also contains a C-terminal alpha+beta subdomain
  1. Dipeptide transport protein [63992] (1)
    uperfamily
43. Homo-oligomeric flavin-containing Cys decarboxylases, HFCD [52506] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456
  1. Homo-oligomeric flavin-containing Cys decarboxylases, HFCD [52507] (1)
    uperfamily
44. HAD-like [56783] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456
  1. HAD-like [56784] (25)
    usually contains an insertion (sub)domain after strand 1
    uperfamily
45. NagB/RpiA/CoA transferase-like [100949] (1)
  core: 3 layers: a/b/a; parallel or mixed beta-sheet of 6 strands, order 321456
  1. NagB/RpiA/CoA transferase-like [100950] (8)
    uperfamily
46. Hypothetical protein MTH777 (MT0777) [75180] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456
  1. Hypothetical protein MTH777 (MT0777) [75181] (1)
    uperfamily
47. Thiamin pyrophosphokinase, catalytic domain [63998] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 432156
  1. Thiamin pyrophosphokinase, catalytic domain [63999] (1)
    uperfamily
48. Undecaprenyl diphosphate synthase [64004] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 342156
  1. Undecaprenyl diphosphate synthase [64005] (1)
    the sheet topology is similar to those of the N-terminal domain of phosphoglycerate kinase and carbamate kinase
    uperfamily
49. F420-dependent methylenetetrahydromethanopterin dehydrogenase (MTD) [102323] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 213456
  1. F420-dependent methylenetetrahydromethanopterin dehydrogenase (MTD) [102324] (1)
    the sheet topology is similar to those of the Periplasmic binding protein-like I domains
    uperfamily
50. Thiamin diphosphate-binding fold (THDP-binding) [52517] (1)
  3 layers: a/b/a; parallel beta-sheet of 6 strands, order 213465
  1. Thiamin diphosphate-binding fold (THDP-binding) [52518] (8)
    there are two different functional modules of this fold: pyridine-binding (Pyr) and pyrophosphate-binding (PP) modules
    two Pyr and two PP modules assemble together in a conserved heterotetrameric core that binds two THDP coenzyme molecules
    uperfamily
51. P-loop containing nucleoside triphosphate hydrolases [52539] (1)
  3 layers: a/b/a, parallel or mixed beta-sheets of variable sizes
  1. P-loop containing nucleoside triphosphate hydrolases [52540] (24)
    division into families based on beta-sheet topologies
    uperfamily
52. PTS IIb component [52727] (1)
  3 layers: a/b/a, parallel beta-sheet of 6 strands, order 324156
  1. PTS IIb component [52728] (1)
    uperfamily
53. DNA polymerase III chi subunit [102399] (1)
  3 layers, a/b/a; parallel beta-sheet of 7 strands, order 7165243
  1. DNA polymerase III chi subunit [102400] (1)
    structural similarity and possible evolutionary relationship to the AAA domain; lacks the P-loop motif
    uperfamily
54. Nicotinate mononucleotide:5,6-dimethylbenzimidazole phosphoribosyltransferase (CobT) [52732] (1)
  3 layers: a/b/a, parallel beta-sheet of 7 strands, order 3214567
  1. Nicotinate mononucleotide:5,6-dimethylbenzimidazole phosphoribosyltransferase (CobT) [52733] (1)
    uperfamily
55. CofD-like [142337] (1)
  3 layers: a/b/a, parallel beta-sheet of 7 strands, order 3214567; topological similarity to the CobT-like fold (scop_cf 52732)
  1. CofD-like [142338] (1)
    uperfamily
56. MCP/YpsA-like [102404] (1)
  3 layers: a/b/a, parallel beta-sheet of 7 strands, order 4321567
  1. MCP/YpsA-like [102405] (2)
    uperfamily
57. Methylesterase CheB, C-terminal domain [52737] (1)
  3 layers: a/b/a, parallel beta-sheet of 7 strands, order 3421567
  1. Methylesterase CheB, C-terminal domain [52738] (1)
    uperfamily
58. Subtilisin-like [52742] (1)
  3 layers: a/b/a, parallel beta-sheet of 7 strands, order 2314567; left-handed crossover connection between strands 2 & 3
  1. Subtilisin-like [52743] (2)
    uperfamily
59. Indigoidine synthase A-like [110580] (1)
  core: 3 layers, a/b/a; parallel beta-sheet of 7 strands, order 2134756
  1. Indigoidine synthase A-like [110581] (1)
    uperfamily
60. Arginase/deacetylase [52767] (1)
  3 layers: a/b/a, parallel beta-sheet of 8 strands, order 21387456
  1. Arginase/deacetylase [52768] (2)
    uperfamily
61. Alpha-2,3/8-sialyltransferase CstII [102413] (1)
  3 layers: a/b/a; parallel beta-sheet of 8 strands, order 54321678
  1. Alpha-2,3/8-sialyltransferase CstII [102414] (1)
    uperfamily
62. Cell-division inhibitor MinC, N-terminal domain [64042] (1)
  beta(2)-(alpha-beta)2-beta; 2 layers, a/b; mixed beta-sheet of 5 strands, order 12345; strands 1 & 5 are antiparallel to the rest
  1. Cell-division inhibitor MinC, N-terminal domain [64043] (1)
    uperfamily
63. DTD-like [69499] (1)
  beta(2)-(alpha-beta)2-beta(3); 3 layers, a/b/b; some topological similarity to the N-terminal domain of MinC
  1. DTD-like [69500] (1)
    active form is a dimer
    uperfamily
64. CoA-dependent acyltransferases [52776] (1)
  core: 2 layers, a/b; mixed beta-sheet of 6 strands, order 324561; strands 3 & 6 are antiparallel to the rest
  1. CoA-dependent acyltransferases [52777] (3)
    uperfamily
65. Phosphotyrosine protein phosphatases I-like [52787] (2)
  3 layers: a/b/a; parallel beta-sheet of 4 strands, order 2134
  1. Phosphotyrosine protein phosphatases I [52788] (1)
    share the common active site structure with the family II
    uperfamily
  2. PTS system IIB component-like [52794] (2)
    uperfamily
66. (Phosphotyrosine protein) phosphatases II [52798] (1)
  core: 3 layers, a/b/a; parallel beta-sheet of 4 strands, order 1423
  1. (Phosphotyrosine protein) phosphatases II [52799] (5)
    share with the family I the common active site structure with a circularly permuted topology
    uperfamily
67. Rhodanese/Cell cycle control phosphatase [52820] (1)
  3 layers: a/b/a; parallel beta-sheet of 5 strands, order 32451
  1. Rhodanese/Cell cycle control phosphatase [52821] (4)
    Pfam 00581
    the active site structure is similar to those of the families I and II protein phosphatases; the topology can be related by a different circular permutation to the family I topology
    uperfamily
68. Thioredoxin fold [52832] (2)
  core: 3 layers, a/b/a; mixed beta-sheet of 4 strands, order 4312; strand 3 is antiparallel to the rest
  1. Thioredoxin-like [52833] (23)
    uperfamily
  2. RNA 3'-terminal phosphate cyclase, RPTC, insert domain [52913] (1)
    uperfamily
69. Peptidyl-tRNA hydrolase II [102461] (1)
  3 layers: a/b/a; mixed beta-sheet of 4 strands, order 2143, strand 4 is antiparallel to the rest
  1. Peptidyl-tRNA hydrolase II [102462] (1)
    uperfamily
70. TK C-terminal domain-like [52921] (1)
  3 layers: a/b/a; mixed beta-sheet of 5 strands, order 13245, strand 1 is antiparallel to the rest
  1. TK C-terminal domain-like [52922] (3)
    uperfamily
71. Pyruvate kinase C-terminal domain-like [52934] (2)
  3 layers: a/b/a; mixed beta-sheet of 5 strands, order 32145, strand 5 is antiparallel to the rest
  1. PK C-terminal domain-like [52935] (2)
    uperfamily
  2. ATP synthase (F1-ATPase), gamma subunit [52943] (1)
    contains an antiparallel coiled coil formed by N- and C-terminal extensions to the common fold
    uperfamily
72. Anticodon-binding domain-like [52953] (6)
  3 layers: a/b/a; mixed beta-sheet of five strands, order 21345; strand 4 is antiparallel to the rest
  1. Class II aaRS ABD-related [52954] (2)
    uperfamily
  2. TolB, N-terminal domain [52964] (1)
    uperfamily
  3. B12-dependent dehydatase associated subunit [52968] (2)
    uperfamily
  4. ITPase-like [52972] (3)
    formerly Maf/Ham1; elaborated with additional structures inserted in the common fold
    uperfamily
  5. CinA-like [142433] (1)
    uperfamily
  6. XCC0632-like [159594] (2)
    short crossover loop between strands 2 and 3; the antiparallel part of the beta-sheet (strands 3, 4 and 5) and the C-terminal helix are quite long
73. MTH938-like [64075] (1)
  core: 3 layers, b+a/b/a ; the central mixed sheet of 5 strands: order 21534; strand 2 is antiparallel to the rest
  1. MTH938-like [64076] (1)
    uperfamily
74. Restriction endonuclease-like [52979] (4)
  core: 3 layers, a/b/a; mixed beta-sheet of 5 strands, order 12345; strands 2 &, in some families, 5 are antiparallel to the rest
  1. Restriction endonuclease-like [52980] (33)
    uperfamily
  2. tRNA-intron endonuclease catalytic domain-like [53032] (1)
    uperfamily
  3. Eukaryotic RPB5 N-terminal domain [53036] (1)
    uperfamily
  4. TBP-interacting protein-like [159612] (1)
    contains extra C-terminal alpha+beta domain of complex fold with an embeded C2H2 zinc-finger
75. Resolvase-like [53040] (2)
  Core: 3 layers: a/b/a; mixed beta-sheet of 5 strands, order 21345; strand 5 is antiparallel to the rest
  1. Resolvase-like [53041] (1)
    uperfamily
  2. beta-carbonic anhydrase, cab [53056] (1)
    uperfamily
76. PTS system fructose IIA component-like [53061] (1)
  3 layers: a/b/a; mixed beta-sheet of 5 strands, order 21345; strand 5 is antiparallel to the rest
  1. PTS system fructose IIA component-like [53062] (2)
    active dimer is formed by strand 5 swapping
    uperfamily
77. Ribonuclease H-like motif [53066] (7)
  3 layers: a/b/a; mixed beta-sheet of 5 strands, order 32145; strand 2 is antiparallel to the rest
  1. Actin-like ATPase domain [53067] (14)
    duplication contains two domains of this fold
    uperfamily
  2. Creatinase/prolidase N-terminal domain [53092] (1)
    uperfamily
  3. Ribonuclease H-like [53098] (14)
    consists of one domain of this fold
    uperfamily
  4. Translational machinery components [53137] (2)
    uperfamily
  5. Nitrogenase accessory factor-like [53146] (2)
    uperfamily
  6. DNA repair protein MutS, domain II [53150] (1)
    uperfamily
  7. Methylated DNA-protein cysteine methyltransferase domain [53155] (1)
    uperfamily
78. Phosphorylase/hydrolase-like [53162] (8)
  core: 3 layers, a/b/a ; mixed sheet of 5 strands: order 21354; strand 4 is antiparallel to the rest; contains crossover loops
  1. HybD-like [53163] (2)
    the HybD fold coincides with the consensus core structure
    uperfamily
  2. Purine and uridine phosphorylases [53167] (1)
    complex architecture; contains mixed beta-sheet of 8 strands, order 23415867, strands 3, 6 & 7 are antiparallel to the rest; and barrel, closed; n=5, S=8
    uperfamily
  3. Peptidyl-tRNA hydrolase-like [53178] (1)
    uperfamily
  4. Pyrrolidone carboxyl peptidase (pyroglutamate aminopeptidase) [53182] (1)
    uperfamily
  5. Zn-dependent exopeptidases [53187] (9)
    core: mixed beta-sheet of 8 strands, order 12435867; strands 2, 6 & 7 are antiparallel to the rest
    uperfamily
  6. LigB-like [53213] (1)
    circular permutation of the common fold, most similar to the PNP fold
    uperfamily
  7. AF0625-like [142535] (1)
    contains extra C-terminal alpha/beta domain: 3 layers, a/b/a; parallel beta-sheet of 4 strands, order 2134
    uperfamily
  8. Cgl1923-like [159659] (1)
79. Molybdenum cofactor biosynthesis proteins [53217] (1)
  3 layers: a/b/a; mixed beta-sheet of 5 strands; order: 21354, strand 5 is antiparallel to the rest; permutation of the Phosphorylase/hydrolase-like fold
  1. Molybdenum cofactor biosynthesis proteins [53218] (2)
    uperfamily
80. CobE/GbiG C-terminal domain-like [159663] (1)
  3 layers: a/b/a; mixed beta-sheet of 5 strands, order 32154; strand 5 is antiparallel to the rest
  1. CobE/GbiG C-terminal domain-like [159664] (1)
    probably involved in deacylation steps in both anaerobic and aerobic pathways of cobalamin biosynthesis
81. CbiG N-terminal domain-like [159671] (1)
  3 layers: a/b/a; mixed beta-sheet of 6 strands, order 213456, strand 5 is antiparallel to the rest
  1. CbiG N-terminal domain-like [159672] (1)
    probable biological unit is a homodimer; putative active site is formed by residues from both subunits
82. Bacterial fluorinating enzyme, N-terminal domain [102521] (1)
  3 layers: a/b/a; mixed beta-sheet of 6 strands; order: 213546, strand 5 is antiparallel to the rest; topological similarity to the MogA-like family fold
  1. Bacterial fluorinating enzyme, N-terminal domain [102522] (1)
    uperfamily
83. Caspase-like [52128] (1)
  3 layers, a/b/a; core: mixed beta-sheet of 6 strands, order 213456, strand 6 is antiparallel to the rest
  1. Caspase-like [52129] (2)
    mature protein may be composed of two chains folded in a single domain
    uperfamily
84. Macro domain-like [52948] (1)
  3 layers: a/b/a; mixed beta-sheet of 6 strands, order 165243, strand 3 is antiparallel to the rest
  1. Macro domain-like [52949] (2)
    uperfamily
85. MurD-like peptide ligases, peptide-binding domain [53243] (1)
  3 layers: a/b/a; mixed beta-sheet of 6 strands, order 126345; strand 1 is antiparallel to the rest
  1. MurD-like peptide ligases, peptide-binding domain [53244] (2)
    uperfamily
86. Phosphoglycerate mutase-like [53253] (1)
  core: 3 layers, a/b/a; mixed beta-sheet of 6 strands, order 324156; strand 5 is antiparallel to the rest
  1. Phosphoglycerate mutase-like [53254] (3)
    uperfamily
87. PRTase-like [53270] (1)
  core: 3 layers, a/b/a; mixed beta-sheet of 6 strands, order 321456; strand 3 is antiparallel to the rest
  1. PRTase-like [53271] (2)
    uperfamily
88. vWA-like [53299] (1)
  core: 3 layers, a/b/a; mixed beta-sheet of 6 strands, order 321456; strand 3 is antiparallel to the rest
  1. vWA-like [53300] (5)
    uperfamily
89. Pyruvate-ferredoxin oxidoreductase, PFOR, domain III [53322] (1)
  3 layers: a/b/a; mixed beta-sheet of 6 strands, order 231456; strand 3 is antiparallel to the rest
  1. Pyruvate-ferredoxin oxidoreductase, PFOR, domain III [53323] (1)
    uperfamily
90. RbsD-like [102545] (1)
  3 layers: a/b/a; mixed beta-sheet of 6 strands, order 251634; strand 6 is antiparallel to the rest
  1. RbsD-like [102546] (1)
    uperfamily
91. FabD/lysophospholipase-like [52150] (1)
  core: 3 layers, a/b/a; mixed beta-sheet of 6 strands, order 432156; strand 4 is antiparallel to the rest
  1. FabD/lysophospholipase-like [52151] (3)
    uperfamily
92. L-sulfolactate dehydrogenase-like [89732] (1)
  core: 3 layers, a/b/a; mixed sheet of 7 strands, order 1237456; strands 1, 6 and 7 are antiparallel to the rest
  1. L-sulfolactate dehydrogenase-like [89733] (1)
    topological similarity to the domain 2 of TM1585
    uperfamily
93. Formyltransferase [53327] (1)
  3 layers: a/b/a; mixed beta-sheet of 7 strands, order 3214567; strand 6 is antiparallel to the rest
  1. Formyltransferase [53328] (1)
    uperfamily
94. S-adenosyl-L-methionine-dependent methyltransferases [53334] (1)
  core: 3 layers, a/b/a; mixed beta-sheet of 7 strands, order 3214576; strand 7 is antiparallel to the rest
  1. S-adenosyl-L-methionine-dependent methyltransferases [53335] (57)
    uperfamily
95. LmbE-like [102587] (1)
  3 layers, a/b/a; mixed beta-sheet of 7 strands, order 3214576; strand 7 is antiparallel to the rest; topological similarity to SAM-dependent methyltransferases
  1. LmbE-like [102588] (1)
    uperfamily
96. PLP-dependent transferase-like [53382] (3)
  main domain: 3 layers: a/b/a, mixed beta-sheet of 7 strands, order 3245671; strand 7 is antiparallel to the rest
  1. PLP-dependent transferases [53383] (9)
    uperfamily
  2. PhnH-like [159709] (1)
    single domain protein of similar topology to the core domain of PLP-transferases
  3. Dhaf3308-like [159713] (1)
    not known to bind PLP cofactor; the extra N-terminal subdomain has a enolase N-terminal domain-like fold (scop_cf 54825)
97. Nucleotide-diphospho-sugar transferases [53447] (1)
  3 layers: a/b/a; mixed beta-sheet of 7 strands, order 3214657; strand 6 is antiparallel to the rest
  1. Nucleotide-diphospho-sugar transferases [53448] (19)
    uperfamily
98. RibA-like [142694] (1)
  3 layers: a/b/a; mixed beta-sheet of 7 strands, order 1235467, strands 1 and 3 are antiparallel to the rest; partial topological similarity to some alpha/beta hydrolases (scop_cf 53473)
  1. RibA-like [142695] (1)
    uperfamily
99. Activating enzymes of the ubiquitin-like proteins [69571] (1)
  3 layers: a/b/a; mixed beta-sheet of 8 strands, order 32145678; strands 6 and 8 are antiparallel to the rest
  1. Activating enzymes of the ubiquitin-like proteins [69572] (2)
    transfer adenylyl group to the C-terminal carboxyl group of the ubiquitin and MoaD/ThiS-related proteins
    the ATP nucleotide-binding site is similar to that of the NAD-binding Rossmann-folds
    uperfamily
100. alpha/beta-Hydrolases [53473] (1)
  core: 3 layers, a/b/a; mixed beta-sheet of 8 strands, order 12435678, strand 2 is antiparallel to the rest
  1. alpha/beta-Hydrolases [53474] (41)
    many members have left-handed crossover connection between strand 8 and additional strand 9
    uperfamily
101. Nucleoside hydrolase [53589] (1)
  core: 3 layers, a/b/a ; mixed beta-sheet of 8 strands, order 32145687; strand 7 is antiparallel to the rest
  1. Nucleoside hydrolase [53590] (1)
    uperfamily
102. Dihydrofolate reductase-like [53596] (1)
  3 layers: a/b/a; mixed beta-sheet of 8 strands, order 34251687; strand 8 is antiparallel to the rest
  1. Dihydrofolate reductase-like [53597] (2)
    uperfamily
103. Ribokinase-like [53612] (3)
  core: 3 layers: a/b/a; mixed beta-sheet of 8 strands, order 21345678, strand 7 is antiparallel to the rest
  potential superfamily: members of this fold have similar functions but different ATP-binding sites
  1. Ribokinase-like [53613] (5)
    has extra strand located between strands 2 and 3
    uperfamily
  2. MurD-like peptide ligases, catalytic domain [53623] (2)
    has extra strand located between strands 1 and 2
    uperfamily
  3. CoaB-like [102645] (1)
    combination of the Rossmann-like and Ribokinase-like topologies; mixed beta-sheet of 8 strands, order 32145678, strand 7 is antiparallel to the rest
    uperfamily
104. YjeF N-terminal domain-like [64152] (1)
  3 layers: a/b/a; mixed (mainly parallel) beta-sheet of 8 strands, order 32145678; strand 8 is antiparallel to the rest
  1. YjeF N-terminal domain-like [64153] (1)
    possible circular permutation of the ribokinase-like fold (of the YjeF C-terminal domain)
    uperfamily
105. Carbamate kinase-like [53632] (1)
  3 layers: a/b/a; mixed (mainly parallel) beta-sheet of 8 strands, order 34215786; strand 8 is antiparallel to the rest
  1. Carbamate kinase-like [53633] (3)
    the sheet topology is similar to those of undecaprenyl diphosphate synthase and the N-terminal domain of phosphoglycerate kinase
    uperfamily
106. 2,3-Bisphosphoglycerate-independent phosphoglycerate mutase, substrate-binding domain [64157] (1)
  core:3 layers: a/b/a; mixed beta-sheet of 8 strands, order 45321678, strands 4 and 5 are antiparallel to the rest
  1. 2,3-Bisphosphoglycerate-independent phosphoglycerate mutase, substrate-binding domain [64158] (1)
    uperfamily
107. Alkaline phosphatase-like [53648] (1)
  core:3 layers: a/b/a; mixed beta-sheet of 8 strands, order 43516728, strand 7 is antiparallel to the rest
  1. Alkaline phosphatase-like [53649] (5)
    uperfamily
108. TTHA0583/YokD-like [110709] (1)
  3 layers: a/b/a; mixed beta-sheet of 8 strands, order 78612354; strands 3, 4 and 8 are antiparallel to the rest
  1. TTHA0583/YokD-like [110710] (2)
    uperfamily
109. Glycerol-3-phosphate (1)-acyltransferase [69592] (1)
  3 layers: a/b/a; mixed beta-sheet of 9 strands, order 918736452; strands 1, 2 and 8 are antiparallel to the rest
  1. Glycerol-3-phosphate (1)-acyltransferase [69593] (1)
    some topological similarity to the dihydrofolate reductase fold
    uperfamily
110. AraD/HMP-PK domain-like [53638] (1)
  3 layers: a/b/a; mixed (mostly antiparallel) beta-sheet of 9 strands, order 432159876; left-handed crossover between strands 4 and 5
  1. AraD/HMP-PK domain-like [53639] (2)
    uperfamily
111. SurE-like [64166] (1)
  3 layers: a/b/a; mixed beta-sheet of 9 strands, order 342156798; strands 3, 8 and 9 are antiparallel to the rest; left-handed crossover connection between strands 6 and 7
  1. SurE-like [64167] (1)
    some topological similarity to the N-terminal domain of Glutaminase/Asparaginase family
    uperfamily
112. YerB-like [159773] (1)
  3 layers: b/b/a; central mixed beta-sheet of 9 strands, order 541329678; strands 3 and 7 are antiparallel to the rest; an unusual "over the other end" connection between strands 3 and 4
  1. YerB-like [159774] (1)
113. CdCA1 repeat-like [159778] (1)
  contains two parallel beta-strands of four strands each; the sheets contact each other with edges at a right angle
  1. CdCA1 repeat-like [159779] (1)
114. Isocitrate/Isopropylmalate dehydrogenase-like [53658] (1)
  consists of two intertwined (sub)domains related by pseudo dyad; duplication
  3 layers: a/b/a; single mixed beta-sheet of 10 strands, order 213A945867 (A=10); strands from 5 to 9 are antiparallel to the rest
  1. Isocitrate/Isopropylmalate dehydrogenase-like [53659] (5)
    the constituent families form similar dimers
    uperfamily
115. Amidase signature (AS) enzymes [75303] (1)
  possible duplication: the topologies of N- and C-terminal halves are similar; 3 layers: a/b/a; single mixed beta-sheet of 10 strands, order 213549A867 (A=10); strands from 5 to 9 are antiparallel to the rest
  1. Amidase signature (AS) enzymes [75304] (1)
    uperfamily
116. ATC-like [53670] (2)
  consists of two similar domains related by pseudo dyad; duplication
  core: 3 layers, a/b/a, parallel beta-sheet of 4 strands, order 2134
  1. Aspartate/ornithine carbamoyltransferase [53671] (1)
    uperfamily
  2. Aspartate/glutamate racemase [53681] (1)
    uperfamily
117. Tryptophan synthase beta subunit-like PLP-dependent enzymes [53685] (1)
  consists of two similar domains related by pseudo dyad; duplication
  core: 3 layers, a/b/a; parallel beta-sheet of 4 strands, order 3214
  1. Tryptophan synthase beta subunit-like PLP-dependent enzymes [53686] (1)
    uperfamily
118. SIS domain [53696] (1)
  3 layers: a/b/a; parallel beta-sheet of 5 strands, order 21345
  1. SIS domain [53697] (3)
    uperfamily
119. Formate dehydrogenase/DMSO reductase, domains 1-3 [53705] (1)
  contains of two similar intertwined domains related by pseudo dyad; duplication
  core: 3 layers: a/b/a; parallel beta-sheet of 5 strands, order 32451
  1. Formate dehydrogenase/DMSO reductase, domains 1-3 [53706] (1)
    molybdopterine enzyme
    uperfamily
120. ALDH-like [53719] (1)
  consists of two similar domains with 3 layers (a/b/a) each; duplication
  core: parallel beta-sheet of 5 strands, order 32145
  1. ALDH-like [53720] (2)
    binds NAD differently from other NAD(P)-dependent oxidoreductases
    uperfamily
121. NadA-like [142753] (1)
  duplication; consists of three similar domains related by pseudo threefold symmetry; 3 layers, a/b/a; parallel beta sheet, order: 2134
  1. NadA-like [142754] (1)
    uperfamily
122. Aconitase iron-sulfur domain [53731] (1)
  consists of three similar domains with 3 layers (a/b/a) each; duplication
  core: parallel beta-sheet of 5 strands, order 32145
  1. Aconitase iron-sulfur domain [53732] (1)
    uperfamily
123. Phosphoglucomutase, first 3 domains [53737] (1)
  consists of three similar domains with 3 layers (a/b/a) each; duplication
  core: mixed beta-sheet of 4 strands, order 2134, strand 4 is antiparallel to the rest
  1. Phosphoglucomutase, first 3 domains [53738] (1)
    uperfamily
124. FucI/AraA N-terminal and middle domains [53742] (1)
  consists of two domains of similar topology, 3 layers (a/b/a) each
  Domain 1 (1-173) has parallel beta-sheet of 5 strands, order 21345
  Domain 2 (174-355) has parallel beta-sheet of 4 strands, order 2134
  1. FucI/AraA N-terminal and middle domains [53743] (2)
    uperfamily
125. YgbK-like [142763] (1)
  consists of two domains with partial topological similarity to the P-loop kinases but without the P-loop motif; the domain association results in the formation of a single mixed beta-sheet of 15 strands
  1. YgbK-like [142764] (1)
    uperfamily
126. Phosphoglycerate kinase [53747] (1)
  consists of two non-similar domains, 3 layers (a/b/a) each
  Domain 1 has parallel beta-sheet of 6 strands, order 342156
  Domain 2 has parallel beta-sheet of 6 strands, order 321456
  1. Phosphoglycerate kinase [53748] (1)
    uperfamily
127. UDP-Glycosyltransferase/glycogen phosphorylase [53755] (1)
  consists of two non-similar domains with 3 layers (a/b/a) each
  domain 1: parallel beta-sheet of 7 strands, order 3214567
  domain 2: parallel beta-sheet of 6 strands, order 321456
  1. UDP-Glycosyltransferase/glycogen phosphorylase [53756] (11)
    uperfamily
128. Glutaminase/Asparaginase [53773] (1)
  consists of two non-similar alpha/beta domains, 3 layers (a/b/a) each
  Domain 1 has mixed beta-sheet of 6 strands, order 213456, strand 6 is antiparallel to the rest; left-handed crossover connection between strands 4 and 5
  Domain 2 has parallel beta-sheet of 4 strands, order 1234
  1. Glutaminase/Asparaginase [53774] (1)
    uperfamily
129. Phosphofructokinase [53783] (1)
  consists of two non-similar domains, 3 layers (a/b/a) each
  Domain 1 has mixed sheet of 7 strands, order 3214567; strands 3 & 7 are antiparallel to the rest
  Domain 2 has parallel sheet of 4 strands, order 2314
  1. Phosphofructokinase [53784] (1)
    uperfamily
130. Tetrapyrrole methylase [53789] (1)
  consists of two non-similar domains
  Domain 1 has parallel sheet of 5 strands, order 32415
  Domain 2 has mixed sheet of 5 strands, order 12534; strands 4 & 5 are antiparallel to the rest
  1. Tetrapyrrole methylase [53790] (1)
    uperfamily
131. GckA/TtuD-like [82543] (1)
  consists of two non-similar domains
  Domain 1 has parallel sheet of 6 strands, order 321456, Rossmann-like topology
  Domain 2 has mixed sheet of 6 strands, order 126345; strands 5 and 6 are antiparallel to the rest; some similarity to CbiF Domain 2
  1. GckA/TtuD-like [82544] (1)
    uperfamily
132. DAK1/DegV-like [82548] (1)
  2 different domains; d1: [core: 3 layers, a/b/a; parallel sheet of 5 strands, order: 2134]; D2: [2 layers, a/b; mixed sheet of 6 strands, order 321645; strands 2 and 6 are antiparallel to the rest]
  1. DAK1/DegV-like [82549] (2)
    domain folds and architecture show some similarity to the tubulin-like GTPases; the nucleotide-binding sites of the Dihydroxyacetone kinase and tubulin families are different
    uperfamily
133. DHH phosphoesterases [64181] (1)
  consists of two non-similar domains
  Domain 1 has parallel sheet of 6 strands, order 321456
  Domain 2 has mixed sheet of 5 strands, order 12345; strands 1 & 4 are antiparallel to the rest
  1. DHH phosphoesterases [64182] (2)
    constituent families have similar domain organization with variable interdomain linker and spatial arrangement of the domains
    uperfamily
134. Glycerate kinase I [110737] (1)
  consists of two different alpha/beta domains; (1) of the Flavodoxin-like fold (scop_cf 52171); (2) similar to the Restriction endonuclease-like fold (scop_cf 52979), inserted into domain 1
  1. Glycerate kinase I [110738] (1)
    uperfamily
135. PEP carboxykinase-like [53794] (1)
  contains a P-loop NTP-binding motif; mixed beta-sheet folds into a barrel-like structure with helices packed on one side
  1. PEP carboxykinase-like [53795] (2)
    uperfamily
136. PEP carboxykinase N-terminal domain [68922] (1)
  contains mixed beta-sheets; topology is partly similar to that of the catalytic C-terminal domain
  1. PEP carboxykinase N-terminal domain [68923] (1)
    uperfamily
137. Chelatase-like [53799] (3)
  duplication: tandem repeat of two domains; 3 layers (a/b/a); parallel beta-sheet of 4 strands, order 2134
  1. Chelatase [53800] (3)
    interdomain linker is short; swapping of C-terminal helices between the two domains
    uperfamily
  2. "Helical backbone" metal receptor [53807] (4)
    contains a long alpha helical insertion in the interdomain linker
    uperfamily
  3. PrpR receptor domain-like [159800] (1)
    recent PDB entry 2q5c belongs to this superfamily
138. HemD-like [69617] (1)
  duplication: consists of two similar 'swapped' domain with 3 layers (a/b/a) each; parallel beta-sheet of 5 strands, order 21345
  1. HemD-like [69618] (1)
    uperfamily
139. CAC2185-like [142794] (1)
  consists of two non-similar domains, 3 layers (a/b/a) each; d1 has parallel sheet of 4 strands, order 2134; d2 has parallel sheet of 5 strands, order 21345, and antiparallel meander sheet of 3 strands
  1. CAC2185-like [142795] (1)
    uperfamily
140. Periplasmic binding protein-like I [53821] (1)
  consists of two similar intertwined domain with 3 layers (a/b/a) each: duplication
  parallel beta-sheet of 6 strands, order 213456
  1. Periplasmic binding protein-like I [53822] (1)
    Similar in architecture to the superfamily II but partly differs in topology
    uperfamily
141. Periplasmic binding protein-like II [53849] (1)
  consists of two similar intertwined domain with 3 layers (a/b/a) each: duplication
  mixed beta-sheet of 5 strands, order 21354; strand 5 is antiparallel to the rest
  1. Periplasmic binding protein-like II [53850] (3)
    Similar in architecture to the superfamily I but partly differs in topology
    uperfamily
142. Thiolase-like [53900] (1)
  consists of two similar domains related by pseudo dyad; duplication
  3 layers: a/b/a; mixed beta-sheet of 5 strands, order 32451; strand 5 is antiparallel to the rest
  1. Thiolase-like [53901] (2)
    uperfamily
143. NIF3 (NGG1p interacting factor 3)-like [102704] (1)
  consist of two intertwined domains; duplication: contains two structural repeats of alpha-beta-(beta-alpha)3 motif with mixed beta-sheet, order: 1432, strand 1 is antiparallel to the rest
  1. NIF3 (NGG1p interacting factor 3)-like [102705] (1)
    di-iron binding protein
    uperfamily
144. Fe-only hydrogenase [53919] (1)
  consist of two intertwined domains; contains partial duplication
  1. Fe-only hydrogenase [53920] (1)
    uperfamily
145. ComB-like [142822] (1)
  contains of two similar intertwined domains related by pseudo dyad; duplication; core: 3 layers: a/b/a; parallel beta-sheet of 4 strands, order 1423
  1. ComB-like [142823] (1)
    uperfamily
146. CoA-transferase family III (CaiB/BaiF) [89795] (1)
  consist of two different alpha/beta domains; N-terminal domain has a SurE-like topology with a left-handed beta-alpha-beta unit
  1. CoA-transferase family III (CaiB/BaiF) [89796] (1)
    uperfamily
147. Cytidine deaminase-like [53926] (2)
  core: alpha-beta(2)-(alpha-beta)2; 3 layers (a/b/a); mixed beta-sheet of 4 strands, order 2134; strand 1 is antiparallel to the rest
  1. Cytidine deaminase-like [53927] (5)
    contains extra C-terminal strand 5, order 21345
    uperfamily
  2. JAB1/MPN domain [102712] (1)
    uperfamily
Alpha and beta proteins (a+b) [53931] (376)
Mainly antiparallel beta sheets (segregated alpha and beta regions)
1. Microbial ribonucleases [53932] (1)
  single helix packs against antiparallel beta-sheet
  1. Microbial ribonucleases [53933] (3)
    uperfamily
2. Lysozyme-like [53954] (1)
  common alpha+beta motif for the active site region
  1. Lysozyme-like [53955] (11)
    uperfamily
3. Cysteine proteinases [54000] (1)
  consists of one alpha-helix and 4 strands of antiparallel beta-sheet and contains the catalytic triad Cys-His-Asn
  1. Cysteine proteinases [54001] (22)
    the constitute families differ by insertion into and circular permutation of the common catalytic core made of one alpha-helix and 3-strands of beta-sheet
    uperfamily
4. His-Me finger endonucleases [54059] (1)
  core: (alpha)-beta-omega_loop-beta-alpha; embeded in larger different structures
  1. His-Me finger endonucleases [54060] (6)
    common motif contains conserved histidine residue and metal-binding site
    uperfamily
5. RNase A-like [54075] (1)
  contains long curved beta-sheet and 3 helices
  1. RNase A-like [54076] (1)
    can be classified as disulfide-rich
    uperfamily
6. EndoU-like [142876] (1)
  comprises several helices and two three-stranded antiparallel beta-sheets; similar architecture to the RNase A-like fold (scop_cf 54075)
  1. EndoU-like [142877] (2)
    similarity to the RNase A-like superfamily (scop_sf 54076) extends to the active site location and architecture; the two structural cores of the RNase A and EndoU superfamilies are interrelated by a topological permutation - transposition of two pereferial beta-strands, suggesting possible distant homology of the two superfamilies (and their unification in a hyperfamily)
    uperfamily
7. Prion-like [54097] (1)
  beta-alpha-beta-alpha(2); antiparallel beta-ribbon
  1. Prion-like [54098] (1)
    uperfamily
8. LysM domain [54105] (1)
  beta-alpha(2)-beta; antiparallel strands
  1. LysM domain [54106] (1)
    uperfamily
9. gpW/XkdW-like [64209] (2)
  alpha-beta(2)-alpha; antiparallel hairpin
  1. Head-to-tail joining protein W, gpW [64210] (1)
    uperfamily
  2. XkdW-like [159865] (1)
    different packing of secondary structures than in gpW
10. Hypothetical protein MTH677 [110782] (1)
  alpha-beta(2)-alpha; 2 layers a/b; antiparallel beta-hairpin
  1. Hypothetical protein MTH677 [110783] (1)
    uperfamily
11. GTF2I-like repeat [117772] (1)
  alpha(2)-beta-alpha-beta-alpha; 2 layers: a/b; antiparallel beta-ribbon
  1. GTF2I-like repeat [117773] (1)
    uperfamily
12. Urease, gamma-subunit [54110] (1)
  alpha(3)-beta(2); antiparallel hairpin
  1. Urease, gamma-subunit [54111] (1)
    uperfamily
13. IL8-like [54116] (2)
  beta(3)-alpha
  1. Interleukin 8-like chemokines [54117] (1)
    form dimers with different dimerisation modes
    uperfamily
  2. PhtA domain-like [142887] (1)
    contains extra N-terminal beta-hairpin, like structurally similar archaeal "histone-like" proteins (scop_fa 54161), but does not adopt its SH3-like barrel fold
    uperfamily
14. DNA-binding domain [54170] (1)
  beta(3)-alpha; 2 layers: alpha/beta
  1. DNA-binding domain [54171] (4)
    uperfamily
15. Penicillin-binding protein 2x (pbp-2x), c-terminal domain [54183] (1)
  alpha1-beta3; 2 layers: alpha/beta; order 132
  1. Penicillin-binding protein 2x (pbp-2x), c-terminal domain [54184] (1)
    duplication: consists of 2 subdomains of this fold
    uperfamily
16. Dodecin subunit-like [88797] (6)
  beta-alpha-beta(2); 2 layers: alpha/beta; antiparallel beta-sheet: order 132
  1. Dodecin-like [89807] (1)
    uperfamily
  2. Amyloid beta a4 protein copper binding domain (domain 2) [89811] (1)
    uperfamily
  3. N-terminal, heterodimerisation domain of RBP7 (RpoE) [88798] (1)
    uperfamily
  4. D-lysine 5,6-aminomutase beta subunit KamE, N-terminal domain [117778] (1)
    uperfamily
  5. YbjQ-like [117782] (1)
    pentamer, beta/alpha-propeller; additional short beta-strands promote oligomeric assembly
    uperfamily
  6. YdgH-like [159871] (1)
    extra N-terminal structures: short strand and short helix; topological similarity to the YbjQ-like superfamily
17. Ribosomal proteins S24e, L23 and L15e [54188] (1)
  beta-(alpha)-beta-alpha-beta(2); 3 layers: alpha/beta/alpha; antiparallel beta-sheet: order 1243
  1. Ribosomal proteins S24e, L23 and L15e [54189] (3)
    uperfamily
18. Ribosome binding domain-like [100965] (2)
  beta-(2)-alpha(2)-beta(2); 2 layers: beta/alpha; antiparallel beta-sheet: order 1243; topological similarity to the common core of ribosomal proteins L23 and L15e
  1. Trigger factor ribosome-binding domain [102735] (1)
    uperfamily
  2. Translation initiation factor 2 beta, aIF2beta, N-terminal domain [100966] (1)
    uperfamily
19. TFB5-like [142896] (1)
  beta-alpha-beta(2)-alpha; 2 layers, a/b; antiparallel sheet, order: 132; dimerises in solution (PDB 2jnj) via extended N-terminal strand
  1. TFB5-like [142897] (1)
    uperfamily
20. Obg GTP-binding protein C-terminal domain [102740] (1)
  beta-(2)-alpha(3)-beta(2); 2 layers: beta/alpha; mixed beta-sheet: order 1234; strands 2 and 3 a parallel to each other
  1. Obg GTP-binding protein C-terminal domain [102741] (1)
    uperfamily
21. HIT-like [54196] (2)
  alpha-beta(3)-alpha-beta(2); 3 layers: alpha/beta/alpha
  1. HIT-like [54197] (4)
    uperfamily
  2. Rotavirus NSP2 fragment, C-terminal domain [75347] (1)
    uperfamily
22. Secretion chaperone-like [69634] (5)
  alpha-beta(3)-alpha-beta(2)-alpha; 2 layers: alpha/beta
  1. Type III secretory system chaperone-like [69635] (2)
    uperfamily
  2. Arp2/3 complex subunits [69645] (1)
    uperfamily
  3. YjbR-like [142906] (1)
    overall similar to the Type III secretory system chaperone subunits; different shape of the beta-sheet
    uperfamily
  4. YdhG-like [159888] (1)
    some similarity to YjbR-like (scop_sf 136320)
  5. YgaC/TfoX-N like [159894] (2)
    overall similar to the Type III secretory system chaperone subunits; different shape of the beta-sheet
23. DNA-binding domain of intron-encoded endonucleases [64495] (1)
  beta(2)-alpha(2)-beta; 2 layers; 3-stranded antiparallel beta-sheet, order 213; HTH motif; also includes the extra N-terminal, DNA minor groove-binding helix
  1. DNA-binding domain of intron-encoded endonucleases [64496] (1)
    uperfamily
24. MotA C-terminal domain-like [69651] (1)
  alpha-beta(4)-alpha-beta(2)-alpha; 2 layers: alpha/beta
  1. DNA-binding C-terminal domain of the transcription factor MotA [69652] (1)
    uperfamily
25. YktB/PF0168-like [142912] (1)
  alpha-beta(4)-alpha-beta(2)-alpha-beta-alpha; 2 layers, a/b; antiparallel beta-sheet, order: 1234756; half-barrel shape; topological similarity to the MotA C-terminal domain-like fold (scop_cf 69651) and the Secretion chaperone-like fold (scop_cf 69634)
  1. YktB/PF0168-like [142913] (2)
    uperfamily
26. Mago nashi protein [89816] (1)
  beta(4)-alpha-beta(2)-alpha; 2 layers: alpha/beta; antiparallel beta-sheet, order: 651234
  1. Mago nashi protein [89817] (1)
    uperfamily
27. WGR domain-like [142920] (1)
  beta(4)-alpha-X-beta; 2 layers, a/b; antiparallel beta-sheet, order 51234; the beta-hairpin insetrion in strand 1 results in the formation of a beta-triangle structure
  1. WGR domain-like [142921] (1)
    uperfamily
28. PH1570-like [159901] (1)
  duplication: two beta(4)-alpha structural repeats, related by pseudo twofold symmetry; two extra helices in the linker region; single 8-standed antiparallel beta-sheet, order: 12348765
  1. PH1570-like [159902] (1)
29. Ribosomal protein S5 domain 2-like [54210] (1)
  core: beta(3)-alpha-beta-alpha; 2 layers: alpha/beta; left-handed crossover
  1. Ribosomal protein S5 domain 2-like [54211] (12)
    uperfamily
30. beta-Grasp (ubiquitin-like) [54235] (14)
  core: beta(2)-alpha-beta(2); mixed beta-sheet 2143
  1. Ubiquitin-like [54236] (8)
    uperfamily
  2. CAD & PB1 domains [54277] (2)
    contain extra helix; similar heterodimerization modes; possibly related to the ubiquitin-like superfamily
    uperfamily
  3. MoaD/ThiS [54285] (4)
    possible link between the ubiquitin-like and 2Fe-2S ferredoxin-like superfamilies
    uperfamily
  4. TGS-like [81271] (2)
    possibly related to the ubiquitin-like and MoaD/ThiS superfamilies; some similarity to the alpha-L RNA-binding motif
    uperfamily
  5. 2Fe-2S ferredoxin-like [54292] (2)
    uperfamily
  6. Staphylokinase/streptokinase [54328] (1)
    uperfamily
  7. Doublecortin (DC) [89837] (1)
    possibly related to the ubiquitin-like superfamily
    uperfamily
  8. Superantigen toxins, C-terminal domain [54334] (1)
    uperfamily
  9. Immunoglobulin-binding domains [54358] (1)
    uperfamily
  10. Translation initiation factor IF3, N-terminal domain [54364] (1)
    uperfamily
  11. Glutamine synthetase, N-terminal domain [54368] (1)
    uperfamily
  12. TmoB-like [110814] (1)
    possibly related to the ubiquitin-like and/or 2Fe-2S ferredoxin-like superfamilies
    uperfamily
  13. Nqo1 middle domain-like [142984] (1)
    possibly evolved from 2Fe-2S ferredoxins; contains no iron-sulfur cluster
    uperfamily
  14. NSP3A-like [159936] (1)
    short helical inserions in the common fold
31. MM3350-like [159940] (1)
  beta(2)-alpha-beta(4); antiparallel beta-sheet; order: 216534; similar to a ubiquitin-like fold with the extra C-terminal strand inserted in the middle of the beta-sheet
  1. MM3350-like [159941] (1)
32. WWE domain [117838] (1)
  beta(2)-alpha-beta(4); antiparallel folded beta-sheet (half-barrel), order 216543
  1. WWE domain [117839] (1)
    uperfamily
33. FAD-linked reductases, C-terminal domain [54372] (1)
  alpha+beta sandwich
  1. FAD-linked reductases, C-terminal domain [54373] (7)
    N-terminal domain is beta/beta/alpha common fold
    uperfamily
34. Cystatin-like [54402] (7)
  Core: alpha-beta(4); helix packs against coiled antiparallel beta-sheet
  1. Cystatin/monellin [54403] (6)
    has a additional strand at the N-terminus
    uperfamily
  2. Amine oxidase N-terminal region [54416] (1)
    uperfamily
  3. DsbC/DsbG N-terminal domain-like [54423] (1)
    uperfamily
  4. NTF2-like [54427] (30)
    has a beta-alpha(2)-beta insertion after the main helix
    uperfamily
  5. Uracil-DNA glycosylase inhibitor protein [54441] (1)
    has an additional strand at the C-terminus and a helix inserted after the first strand
    uperfamily
  6. Putative dsDNA mimic [102816] (1)
    elaborated with additional structures; some similarity to Uracil-DNA glycosylase (UGI) and Nuclease A (NuiA) inhibitors
    uperfamily
  7. Pre-PUA domain [88802] (5)
    this domain is found in association with the PUA domain in the C-terminal region of Archaeosine tRNA-guanine transglycosylase and related stand-alone proteins
    uperfamily
35. Nuclease A inhibitor (NuiA) [82601] (1)
  alpha-beta-alpha-beta-alpha(2)-beta(3); antiparallel beta-sheet; order: 15432
  1. Nuclease A inhibitor (NuiA) [82602] (1)
    some structural similarity to Uracil-DNA glycosylase inhibitor and putative dsDNA mimic HI1450 of the cystatin-like fold
    uperfamily
36. Colicin D/E5 nuclease domain [102823] (1)
  alpha(2)-beta(4)-alpha, 2 layers: alpha/beta, antiparallel beta sheet, meander
  1. Colicin D/E5 nuclease domain [102824] (2)
    uperfamily
37. RelE-like [143010] (1)
  beta-alpha(2)-beta(4), 2 layers; a/b, antiparallel beta-sheet; order 15432
  1. RelE-like [143011] (2)
    Toxin component of plasmid stabilisation system
    uperfamily
38. Hypothetical protein SAV1430 [110835] (1)
  beta(3)-alpha-beta(2)-alpha; 2 layers, alpha/beta; antiparallel beta-sheet, order: 12543
  1. Hypothetical protein SAV1430 [110836] (1)
    uperfamily
39. Ns1 effector domain-like [143020] (1)
  beta-X-beta(5)-alpha-beta-alpha; 2 layers: a/b; bifurcated beta-sheet; order 23654[1,7]
  1. Ns1 effector domain-like [143021] (1)
    uperfamily
40. YbaB-like [82606] (1)
  core: alpha-beta(3)-alpha, 2 layers:alpha/beta, three-stranded antiparallel beta sheet, strand order 123
  1. YbaB-like [82607] (1)
    forms tight dimer of a 3-layer structure: beta/alpha/beta
    uperfamily
41. Kinetochore globular domain-like [143025] (1)
  core: alpha-beta(3)-alpha; variant: alpha-beta(4)-alpha(2)
  1. Kinetochore globular domain [143026] (2)
    swapped heterodimer with the N-terminal helices; Spc24-like subunits have the core fold, whereas Spc25-like subunits have a variant fold
    uperfamily
42. L35p-like [143033] (1)
  core: alpha-beta(3)-alpha; 2layers a/b
  1. L35p-like [143034] (1)
    uperfamily
43. Cell division protein ZapA-like [102828] (1)
  core: beta(2)-alpha(2), 2 layers: alpha/beta; long C-terminal helix forms dimeric parallel and tetrameric antiparallel coiled coils
  1. Cell division protein ZapA-like [102829] (1)
    uperfamily
44. ssDNA-binding transcriptional regulator domain [54446] (1)
  helix-swapped dimer of beta(4)-alpha motifs
  1. ssDNA-binding transcriptional regulator domain [54447] (4)
    uperfamily
45. Photosystem I subunit PsaD [64233] (1)
  beta-BETA(2)-beta-alpha-beta(2); antiparallel sheet: order 2134 packed against helix and BETA-hairpin on the same side; irregular C-terminal tail
  1. Photosystem I subunit PsaD [64234] (1)
    uperfamily
46. GINS/PriA/YqbF domain [160058] (1)
  beta(4)-alpha-beta; 3-stranded antiparallel beta-sheet (strands 4,1 and 5) are covered on the same side by the helix and beta hairpin of strands 2 and 3; similarity to the L9 N-domain-like fold (scop_cf 55657) and the PsaD fold (scop_sf 64243)
  1. PriA/YqbF domain [160059] (4)
    associated with known or presumed DNA-binding domains; this superfamily also includes the C-terminal domain of PriA (PDB entry 1zt2)
47. MHC antigen-recognition domain [54451] (1)
  dimeric
  1. MHC antigen-recognition domain [54452] (1)
    uperfamily
48. UBC-like [54494] (1)
  alpha-beta(4)-alpha(3); core: meander beta-sheet plus one helix 2
  1. UBC-like [54495] (4)
    uperfamily
49. SAND domain-like [63762] (1)
  core: three short helices packed against a barrel-like beta-sheet; some similarity to the SH3-like fold
  1. SAND domain-like [63763] (2)
    uperfamily
50. NRDP1 C-terminal domain-like [160087] (1)
  alpha-beta-alpha(3)-beta(3); a pseudo barrel beta-sheet of an SH3-like topology, surrounded by helices
  1. NRDP1 C-terminal domain-like [160088] (1)
51. Coronavirus NSP8-like [143075] (1)
  core: alpha-beta(2)-alpha-beta(4)-alpha-beta; bifurcated barrel-like beta-sheet
  1. Coronavirus NSP8-like [143076] (1)
    uperfamily
52. ParB/Sulfiredoxin [110848] (1)
  beta*-alpha-beta(2)-alpha-beta-alpha; mixed beta sheet forms a partly open barrel: (n*=4, S*=8)
  1. ParB/Sulfiredoxin [110849] (4)
    uperfamily
53. Gamma-glutamyl cyclotransferase-like [110856] (1)
  beta-alpha-beta(4)-alpha-beta(2); contains beta-sheet barrel (n=5, S=8)
  1. Gamma-glutamyl cyclotransferase-like [110857] (1)
    uperfamily
54. BB1717-like [143080] (1)
  complex fold with a bifurcated beta-sheet structure surrounded by helices; contains beta-sheet barrel, closed (n=5, S=8)
  1. BB1717-like [143081] (1)
    uperfamily
55. SARS Nsp1-like [160098] (1)
  complex alpha+beta fold; contains mixed beta-sheet barrel, n=6, S=10
  1. SARS Nsp1-like [160099] (1)
56. Acetoacetate decarboxylase-like [160103] (1)
  complex fold: contains a 3-layer beta-sheet structure, which is folded in two conjoint barrels capped by helices; one rounded barrel has 7 strands, the other flattened barrel has 9 strands
  1. Acetoacetate decarboxylase-like [160104] (1)
57. AF0104/ALDC/Ptd012-like [117855] (1)
  duplication: consists of two similar beta-alpha-beta(4) motifs
  1. AF0104/ALDC/Ptd012-like [117856] (3)
    characteristic metal ion (zinc)-binding motif in the putative active site
    uperfamily
58. NSFL1 (p97 ATPase) cofactor p47, SEP domain [102847] (1)
  beta(3)-alpha(2)-beta; 2 layers; mixed beta-sheet, order 4123, strands 1 and 4 are parallel to each other
  1. NSFL1 (p97 ATPase) cofactor p47, SEP domain [102848] (1)
    uperfamily
59. TTHA1013/TTHA0281-like [143099] (1)
  beta(3)-alpha-beta; 2 layers; mixed beta-sheet, order 4123, strands 1 and 4 are parallel to each other; topological similarity to the SEP domain fold (scop_cf 102847); dimerises via the long C-terminal strand with the formation of a single beta-sheet
  1. TTHA1013/TTHA0281-like [143100] (2)
    uperfamily
60. YegP-like [160112] (1)
  comprises two subunits or tandem repeats of beta(3)-alpha-beta motifs; these assemble with the formation of a single beta-sheet and swapping of the C-terminal strands
  1. YegP-like [160113] (1)
61. Diaminopimelate epimerase-like [54505] (1)
  mixed beta-sheet folds into a barrel (n=8, S=14) around the central helix
  1. Diaminopimelate epimerase-like [54506] (4)
    duplication: consists of two similar domain swapped with C-terminal strands
    uperfamily
62. GFP-like [54510] (1)
  beta-sheet folds into a barrel (n=11, S=14) around the central helix
  1. GFP-like [54511] (2)
    uperfamily
63. Tubby C-terminal domain-like [54517] (1)
  beta-sheet folds into a barrel (n=12, S=12) around the central helix
  1. Tubby C-terminal domain-like [54518] (2)
    uperfamily
64. Pili subunits [54522] (1)
  contains very long N-terminal helix, which end is packed against beta-sheet
  1. Pili subunits [54523] (7)
    bacterial filament proteins
    uperfamily
65. Mitochondrial glycoprotein MAM33-like [54528] (1)
  core: beta(7)-alpha(2); N- and C-terminal extensions form a coiled coil subdomain
  1. Mitochondrial glycoprotein MAM33-like [54529] (1)
    uperfamily
66. NAP-like [143112] (1)
  core: central meander 4-stranded beta-sheet (order: 1234) transversed by a C-terminal helix
  1. NAP-like [143113] (1)
    uperfamily
67. Polo-box domain [82614] (1)
  beta(6)-alpha; antiparallel beta-sheet, meander
  1. Polo-box domain [82615] (2)
    Serine/threonine protein kinase-associated motif embedded in two distinct folds
    uperfamily
68. mRNA decapping enzyme DcpS N-terminal domain [102859] (1)
  beta(3)-alpha-beta(3)-alpha; 3 layers a/b/a
  1. mRNA decapping enzyme DcpS N-terminal domain [102860] (1)
    forms swapped dimer with two 6-stranded antiparallel beta sheets; order 1236[5][4]
    uperfamily
69. Inhibitor of vertebrate lysozyme, Ivy [89871] (1)
  alpha(2)-beta(5)-alpha(2); 3 layers a/b/a; meander beta-sheet
  1. Inhibitor of vertebrate lysozyme, Ivy [89872] (1)
    uperfamily
70. FKBP-like [54533] (3)
  core: beta(2)-alpha-beta(2); antiparallel beta-sheet
  1. FKBP-like [54534] (3)
    uperfamily
  2. Colicin E3 immunity protein [54552] (1)
    uperfamily
  3. Chitinase insertion domain [54556] (1)
    uperfamily
71. Ribosomal protein S16 [54564] (1)
  beta(4)-alpha-beta; 2 layers: alpha/beta; mixed beta-sheet, order: 51234
  1. Ribosomal protein S16 [54565] (1)
    uperfamily
72. Ribosomal protein S19 [54569] (1)
  alpha-beta-X-beta(2); 2 layers: alpha/beta; mixed beta-sheet, order: 123
  1. Ribosomal protein S19 [54570] (1)
    uperfamily
73. YefM-like [143119] (1)
  core: beta-alpha(2)-beta(2)-alpha; mixed beta-sheet, order:123, strands 1 and 2 are parallel; forms compact dimer with a single beta-sheet;
  1. YefM-like [143120] (1)
    uperfamily
74. Ribosomal protein L31e [54574] (1)
  beta-alpha-beta-(alpha)-beta(2); 2 layers: alpha/beta; mixed beta-sheet, order: 1342
  1. Ribosomal protein L31e [54575] (1)
    uperfamily
75. Allophycocyanin linker chain (domain) [54579] (1)
  beta(2)-alpha-beta; 2 layers: alpha/beta
  1. Allophycocyanin linker chain (domain) [54580] (1)
    uperfamily
76. Cdc48 domain 2-like [54584] (1)
  beta-alpha-beta(3); 2 layers: alpha/beta
  1. Cdc48 domain 2-like [54585] (1)
    uperfamily
77. Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase [54592] (1)
  beta-alpha-beta(3); 2 layers: alpha/beta
  1. Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase [54593] (10)
    uperfamily
78. Chromosomal protein MC1 [102874] (1)
  beta(2)-alpha-beta(3); 2 layers: alpha/beta
  1. Chromosomal protein MC1 [102875] (1)
    uperfamily
79. CPE0013-like [160147] (1)
  beta(2)-alpha-beta(3); mixed, mostly antiparallel beta-sheet, folded in a half-barrel; order:31254; strand 3 is parallel to strand 1 and is shorter than the rest
  1. CPE0013-like [160148] (1)
80. beta-hairpin-alpha-hairpin repeat [74651] (2)
  multiple repeats of beta(2)-alpha(2) motif
  1. Ankyrin repeat [48403] (1)
    repeats organized in elongated structures
    uperfamily
  2. Plakin repeat [75399] (1)
    repeats associate forming globular subdomains
    uperfamily
81. Proguanylin [89889] (1)
  beta(2)-alpha(3)-beta; two layers: alpha/beta; antiparallel sheet: order 213
  1. Proguanylin [89890] (1)
    uperfamily
82. SecB-like [54610] (1)
  beta(4)-alpha(2); two layers: alpha/beta; antiparallel sheet: order 1432
  1. SecB-like [54611] (2)
    uperfamily
83. MesJ substrate recognition domain-like [82828] (1)
  beta-alpha(2)-beta(3); 2 layers: a/b; antiparallel beta-sheet, order:1432
  1. MesJ substrate recognition domain-like [82829] (1)
    uperfamily
84. FYSH domain [89894] (1)
  beta(2)-alpha(2)-beta(2)-alpha-beta; two layers: alpha/beta; antiparallel sheet: order 51234
  1. FYSH domain [89895] (2)
    uperfamily
85. VSV matrix protein [75403] (1)
  beta-alpha(2)-beta(4)-alpha-beta(2); two layers: alpha/beta; bifurcated coiled beta-sheet: order of the first 5 strands: 23154
  1. VSV matrix protein [75404] (1)
    uperfamily
86. DNA-binding domain of Mlu1-box binding protein MBP1 [54615] (1)
  beta(4)-alpha(2)-beta(2)-alpha; antiparallel sheet: order 123465
  1. DNA-binding domain of Mlu1-box binding protein MBP1 [54616] (1)
    has some topological similarity to the "winged helix" DNA-binding domain, to B1 and B5 domains of PheRS-beta (1PYS CH B) and to methyl-CpG-binding domain
    uperfamily
87. Heme-binding protein A (HasA) [54620] (1)
  beta-alpha-beta(6)-alpha(2); antiparallel sheet: order 165432
  1. Heme-binding protein A (HasA) [54621] (1)
    uperfamily
88. Chalcone isomerase [54625] (1)
  beta(3)-alpha(2)-beta-alpha(2)-beta3; 2 layers alpha/beta; antiparallel sheet: order 1234567
  1. Chalcone isomerase [54626] (1)
    uperfamily
89. Coproporphyrinogen III oxidase [102885] (1)
  alpha-beta(6)-alpha(2)-beta-alpha(n); 3 layers alpha/beta/alpha; antiparallel sheet: order 1234567
  1. Coproporphyrinogen III oxidase [102886] (1)
    uperfamily
90. Hypothetical protein Ta1206 [102890] (1)
  beta(4)-alpha-beta(2)-alpha(2); mixed, predominately antiparallel beta-sheet, order: 123465, strands 4 and 5 are parallel to each other
  1. Hypothetical protein Ta1206 [102891] (1)
    can be divided into an N-terminal, tetramerisation all-beta subdomain and a C-terminal alpha+beta subdomain related by a circular permutation to the Y-family DNA-polymerase 'fingers' subdomain
    uperfamily
91. CBS-domain pair [54630] (1)
  duplication: tandem repeat of two beta-X-beta-alpha-beta(2)-alpha motifs of similar sequences; 4 layers: a/b/b/a
  1. CBS-domain pair [54631] (1)
    uperfamily
92. Thioesterase/thiol ester dehydrase-isomerase [54636] (1)
  core: beta-alpha-beta(4); 2 layers: alpha/beta
  1. Thioesterase/thiol ester dehydrase-isomerase [54637] (8)
    uperfamily
93. DLC [54647] (1)
  core: beta-alpha(2)-beta-X-beta(2); 2 layers: alpha/beta; antiparallel beta-sheet: order 1342
  1. DLC [54648] (1)
    uperfamily
94. CI-2 family of serine protease inhibitors [54653] (1)
  alpha+beta sandwich; loop across free side of beta-sheet
  1. CI-2 family of serine protease inhibitors [54654] (1)
    uperfamily
95. Integrin beta tail domain [69686] (1)
  alpha-beta-loop-beta(3); loop across free side of beta-sheet
  1. Integrin beta tail domain [69687] (1)
    uperfamily
96. YcgL-like [160190] (1)
  beta(2)-alpha-beta-alpha-beta; 3 layers: a/b/a; antiparallel beta-sheet, order:3124
  1. YcgL-like [160191] (1)
97. alpha/beta-Hammerhead [54664] (5)
  core: beta-BETA-alpha-beta-BETA-beta-alpha; contains a beta-hammerhead motif similar to that in barrel-sandwich hybrids
  1. CO dehydrogenase molybdoprotein N-domain-like [54665] (1)
    uperfamily
  2. Nicotinate/Quinolinate PRTase N-terminal domain-like [54675] (2)
    uperfamily
  3. Pyrimidine nucleoside phosphorylase C-terminal domain [54680] (1)
    uperfamily
  4. Ribosomal protein L16p/L10e [54686] (2)
    uperfamily
  5. Molybdopterin synthase subunit MoaE [54690] (1)
    uperfamily
98. POZ domain [54694] (1)
  core: beta(2)-alpha(2)-beta(2)-alpha(2); 2 layers a/b; mixed sheet: 2143
  1. POZ domain [54695] (2)
    uperfamily
99. EF-Ts domain-like [54712] (2)
  beta(2)-alpha(n)-beta; 2 layers a/b; antiparallel sheet: 123
  1. Elongation factor Ts (EF-Ts), dimerisation domain [54713] (1)
    comprises two structural repeats of this fold
    uperfamily
  2. Band 7/SPFH domain [117892] (1)
    beta(2)-alpha(3)-beta
    uperfamily
100. Fe,Mn superoxide dismutase (SOD), C-terminal domain [54718] (1)
  alpha-beta(2)-alpha-beta-alpha(2); 3 strands of antiparallel sheet: 213
  1. Fe,Mn superoxide dismutase (SOD), C-terminal domain [54719] (1)
    uperfamily
101. ClpS-like [54735] (1)
  beta-alpha(2)-beta-alpha-beta; 2 layers, alpha/beta
  1. ClpS-like [54736] (2)
    uperfamily
102. Hypothetical protein MTH1880 [75411] (1)
  beta-alpha-beta(2)-alpha(2); 3 layers, alpha/beta/alpha; antiparallel beta-sheet: order 123
  1. Hypothetical protein MTH1880 [75412] (1)
    uperfamily
103. Ribosomal L11/L12e N-terminal domain [54746] (1)
  beta-alpha(2)-beta(2); 2 layers, alpha/beta; antiparallel beta-sheet: order 123
  1. Ribosomal L11/L12e N-terminal domain [54747] (1)
    uperfamily
104. Anti-LPS factor/recA domain [54751] (2)
  alpha-beta(3)-alpha(2); 2 layers, alpha/beta
  1. RecA protein, C-terminal domain [54752] (1)
    uperfamily
  2. Anti-lipopolysaccharide factor [54757] (1)
    uperfamily
105. Signal recognition particle alu RNA binding heterodimer, SRP9/14 [54761] (1)
  (beta)-alpha-beta(3)-alpha; 2 layers, alpha/beta
  1. Signal recognition particle alu RNA binding heterodimer, SRP9/14 [54762] (1)
    uperfamily
106. dsRBD-like [54767] (5)
  alpha-beta(3)-alpha; 2 layers: alpha/beta
  1. dsRNA-binding domain-like [54768] (3)
    uperfamily
  2. Porphobilinogen deaminase (hydroxymethylbilane synthase), C-terminal domain [54782] (1)
    uperfamily
  3. YcfA/nrd intein domain [54786] (3)
    uperfamily
  4. Peptidyl-tRNA hydrolase domain-like [110916] (1)
    uperfamily
  5. Rv2632c-like [143212] (1)
    lacks the N-terminal helix; dimerises via the N-terminal strand and the C-terminal helix with the formation of a single beta-sheet wrapped around an antiparallel coiled coil
    uperfamily
107. 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain [110920] (1)
  duplication: consists of two beta(3)-alpha repeats; 3 layers, beta/alpha/beta
  1. 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain [110921] (1)
    uperfamily
108. NMB0488-like [160206] (1)
  duplication: two beta(3)-alpha motifs are related by pseudo twofold symmetry; single antiparrallel beta-sheet, order:321456, shaped into a half-barrel; helical linker region
  1. NMB0488-like [160207] (1)
109. SRP19 [69694] (1)
  beta-alpha-beta(2)-alpha; 2 layers: alpha/beta
  1. SRP19 [69695] (1)
    uperfamily
110. SufE/NifU [82648] (1)
  alpha(2)-beta(3)-alpha(3); 2 layers alpha/beta, 3-stranded antiparallel beta-sheet; order 123
  1. SufE/NifU [82649] (3)
    iron-sulfur cluster assembly proteins
    uperfamily
111. FlaG-like [160213] (1)
  alpha(2)-beta(3)-alpha; 2 layers: a/b; antiparallel beta-sheet, order: 123; partial similatity to the dsRBD-like fold(sop_cf 54767)
  1. FlaG-like [160214] (1)
112. AMPKBI-like [160218] (1)
  comprises 3 short helices and 3-stranded meander beta-sheet; makes extensive intermolecular interactions
  1. AMPKBI-like [160219] (1)
113. DNA-binding protein Tfx [89914] (1)
  alpha(3)-beta-alpha(2)-beta(2); 2 layers alpha/beta, 3-stranded antiparallel beta-sheet; order 123
  1. DNA-binding protein Tfx [89915] (1)
    uperfamily
114. Eukaryotic type KH-domain (KH-domain type I) [54790] (1)
  beta-alpha(2)-beta(2)-alpha; 2 layers: alpha/beta
  1. Eukaryotic type KH-domain (KH-domain type I) [54791] (1)
    Prokaryotic and eukaryotic domains share a KH-motif but have different topologies
    uperfamily
115. Alpha-lytic protease prodomain-like [54805] (10)
  core: alpha-beta(2)-(alpha)-beta; 2 layers: alpha/beta
  1. Alpha-lytic protease prodomain [54806] (1)
    uperfamily
  2. GMP synthetase C-terminal dimerisation domain [54810] (1)
    uperfamily
  3. Prokaryotic type KH domain (KH-domain type II) [54814] (1)
    Prokaryotic and eukaryotic domains share a KH-motif but have different topologies
    uperfamily
  4. Probable GTPase Der, C-terminal domain [82653] (1)
    possible distant relative of the Era C-terminal domain lacking the KH motif
    uperfamily
  5. Ribosome-binding factor A, RbfA [89919] (1)
    possible distant homologue of the type I KH domain lacking the KH motif
    uperfamily
  6. YhbC-like, N-terminal domain [75420] (1)
    uperfamily
  7. BolA-like [82657] (1)
    uperfamily
  8. Fe-S cluster assembly (FSCA) domain-like [117916] (2)
    similar putative active site with a conserved cysteine residue
    uperfamily
  9. Cation efflux protein cytoplasmic domain-like [160240] (1)
  10. EspE N-terminal domain-like [160246] (1)
    contains extra C-terminal helix that packs against shorter N-terminal helix
116. Nucleotidyltransferase [81302] (1)
  core: alpha-beta-turn-beta-X-beta-(alpha); mixed beta-sheet, order of core strands: 123
  1. Nucleotidyltransferase [81301] (14)
    uperfamily
117. Nqo5-like [143242] (1)
  core: alpha-beta(2)-alpha-beta(3); 2 layers, a/b; mixed beta-sheet, order 12534, strands 2 and 5 are parallel
  1. Nqo5-like [143243] (1)
    uperfamily
118. Ribosomal protein S3 C-terminal domain [54820] (1)
  alpha(2)-beta(4); 2 layers: alpha/beta; antiparallel beta-sheet: order 2143
  1. Ribosomal protein S3 C-terminal domain [54821] (1)
    uperfamily
119. Transcription factor NusA, N-terminal domain [69704] (1)
  alpha-beta(3)-alpha-beta-alpha; bifurcated coiled beta-sheet
  1. Transcription factor NusA, N-terminal domain [69705] (1)
    uperfamily
120. Enolase N-terminal domain-like [54825] (1)
  beta(3)-alpha(3); meander and up-and-down bundle
  1. Enolase N-terminal domain-like [54826] (1)
    uperfamily
121. Ribosomal protein L22 [54842] (1)
  beta-alpha(3)-beta(2); 2 layers: alpha/beta; related to the enolase/MLE N-domain fold by a circular permutation
  1. Ribosomal protein L22 [54843] (1)
    some topological similarity to prokaryotic ribosomal protein L17
    uperfamily
122. Prokaryotic ribosomal protein L17 [64262] (1)
  alpha-beta-alpha(3)-beta(2); 2 layers: alpha/beta;
  1. Prokaryotic ribosomal protein L17 [64263] (1)
    some topological similarity to ribosomal protein L22
    uperfamily
123. GroEL-intermediate domain like [54848] (1)
  3-helical bundle packed against 3-stranded mixed beta-sheet
  1. GroEL-intermediate domain like [54849] (2)
    uperfamily
124. PX domain [64267] (1)
  beta(3)-alpha(4); meander beta-sheet packed against array of helices; contains Pro-rich stretch
  1. PX domain [64268] (1)
    uperfamily
125. Shew3726-like [160271] (1)
  beta(3)-alpha(n)-beta; 2 layers, a/b; mixed beta-sheet, order 1234, strands 3 and 4 are parallel with a left-handed crossover connection
  1. Shew3726-like [160272] (1)
126. DsrC, the gamma subunit of dissimilatory sulfite reductase [69720] (1)
  beta(3)-alpha(5); meander beta-sheet packed against array of helices
  1. DsrC, the gamma subunit of dissimilatory sulfite reductase [69721] (1)
    uperfamily
127. DNA damage-inducible protein DinI [54856] (1)
  beta-alpha-beta(2)-alpha; 2 layers: alpha/beta; mixed sheet 213; crossing loops
  1. DNA damage-inducible protein DinI [54857] (1)
    uperfamily
128. HSP90 C-terminal domain [110941] (1)
  alpha-beta(3)-alpha(3); 2 layers, a/b; mixed beta-sheet, order:132; crossing loops
  1. HSP90 C-terminal domain [110942] (1)
    uperfamily
129. Ferredoxin-like [54861] (59)
  alpha+beta sandwich with antiparallel beta-sheet; (beta-alpha-beta)x2
  1. 4Fe-4S ferredoxins [54862] (6)
    uperfamily
  2. Aspartate carbamoyltransferase, Regulatory-chain, N-terminal domain [54893] (1)
    uperfamily
  3. Protease propeptides/inhibitors [54897] (3)
    uperfamily
  4. Dimeric alpha+beta barrel [54909] (23)
    dimerizes through the beta-sheet; forms beta-sheet barrel, closed (n=8, S=12); dimers may assemble in higher oligomers
    uperfamily
  5. GlnB-like [54913] (5)
    form timeric structures with the orthogonally packed beta-sheets
    uperfamily
  6. SEA domain [82671] (1)
    uperfamily
  7. Nucleoside diphosphate kinase, NDK [54919] (1)
    uperfamily
  8. RNA-binding domain, RBD [54928] (5)
    uperfamily
  9. Viral DNA-binding domain [54957] (1)
    uperfamily
  10. RuBisCO, large subunit, small (N-terminal) domain [54966] (1)
    C-terminal domain is beta/alpha barrel
    uperfamily
  11. Acylphosphatase/BLUF domain-like [54975] (2)
    uperfamily
  12. EF-G C-terminal domain-like [54980] (3)
    uperfamily
  13. eEF-1beta-like [54984] (1)
    uperfamily
  14. eEF1-gamma domain [89942] (1)
    elaborated with additional structures
    uperfamily
  15. Anticodon-binding domain of PheRS [54991] (1)
    uperfamily
  16. Ribosomal protein S6 [54995] (1)
    uperfamily
  17. Ribosomal protein S10 [54999] (1)
    uperfamily
  18. N-utilization substance G protein NusG, N-terminal domain [82679] (1)
    uperfamily
  19. PAP/Archaeal CCA-adding enzyme, C-terminal domain [55003] (2)
    uperfamily
  20. HMA, heavy metal-associated domain [55008] (1)
    uperfamily
  21. Urease metallochaperone UreE, C-terminal domain [69737] (1)
    uperfamily
  22. ACT-like [55021] (14)
    regulatory domain linked to a wide range of metabolic enzymes
    uperfamily
  23. Bacterial exopeptidase dimerisation domain [55031] (1)
    uperfamily
  24. NAD-binding domain of HMG-CoA reductase [55035] (1)
    uperfamily
  25. Molybdenum cofactor biosynthesis protein C, MoaC [55040] (1)
    uperfamily
  26. TRADD, N-terminal domain [55044] (1)
    uperfamily
  27. Probable ACP-binding domain of malonyl-CoA ACP transacylase [55048] (1)
    uperfamily
  28. CheY-binding domain of CheA [55052] (1)
    uperfamily
  29. D-ribose-5-phosphate isomerase (RpiA), lid domain [75445] (1)
    uperfamily
  30. Killer toxin KP6 alpha-subunit [55056] (1)
    uperfamily
  31. Hypothetical protein VC0424 [89946] (1)
    uperfamily
  32. Hypothetical protein TT1725 [103007] (1)
    uperfamily
  33. Mechanosensitive channel protein MscS (YggB), C-terminal domain [82689] (1)
    the last strand of the fold is flipped away and involved in oligomerisation
    uperfamily
  34. GHMP Kinase, C-terminal domain [55060] (7)
    common fold is elaborated with additional secondary structures
    uperfamily
  35. Translational regulator protein regA [55064] (1)
    common fold is elaborated with additional secondary structures
    uperfamily
  36. Peptide methionine sulfoxide reductase [55068] (1)
    common fold is elaborated with additional secondary structures
    uperfamily
  37. Nucleotide cyclase [55073] (2)
    common fold is elaborated with additional secondary structures
    uperfamily
  38. 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase, HPPK [55083] (1)
    common fold is elaborated with additional secondary structures
    uperfamily
  39. Glutamyl tRNA-reductase catalytic, N-terminal domain [69742] (1)
    common fold is elaborated with additional secondary structures
    uperfamily
  40. MTH1187/YkoF-like [89957] (2)
    uperfamily
  41. Methyl-coenzyme M reductase subunits [55088] (2)
    each of the three different subunits, alpha, beta and gamma, contains this fold decorated with additional secondary structures
    uperfamily
  42. FAD-linked oxidases, C-terminal domain [55103] (4)
    duplication: contains two subdomains of this fold
    uperfamily
  43. Formylmethanofuran:tetrahydromethanopterin formyltransferase [55112] (1)
    duplication: contains two subdomains of this fold
    uperfamily
  44. Formiminotransferase domain of formiminotransferase-cyclodeaminase. [55116] (1)
    duplication: contains two subdomains of this fold
    uperfamily
  45. Nitrite/Sulfite reductase N-terminal domain-like [55124] (2)
    duplication: contains two subdomains of this fold
    uperfamily
  46. Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains [82693] (1)
    duplication: the N- and C-terminal halves of the whole proteins are structurally similar; each half contains two domains of this fold
    uperfamily
  47. YajQ-like [89963] (1)
    duplication: consists of two domains of this fold swapped with their N-terminal strands
    uperfamily
  48. eIF-2-alpha, C-terminal domain [110993] (1)
    uperfamily
  49. Sporulation related repeat [110997] (1)
    duplication: one domain contains two repeats of similar sequence and structure
    uperfamily
  50. CRISPR-associated protein [117987] (1)
    duplication: contains two subdomains of this fold
    uperfamily
  51. YbeD/HP0495-like [117991] (2)
    uperfamily
  52. DOPA-like [143410] (1)
    probable biological unit is homodimer; the extra C-terminal strand, adjacent and antiparallel to strand 4, contributes to the dimerisation interface
    uperfamily
  53. CcmK-like [143414] (1)
    contains extra C-terminal helix; forms compact hexameric 'tiles' of hexagonal shape
    uperfamily
  54. Transposase IS200-like [143422] (1)
    contains extra N-terminal hairpin and C-terminal helix, both are involved in dimerization; there can be helix-swapping in the dimer
    uperfamily
  55. TTP0101/SSO1404-like [143430] (1)
    contains extra C-terminal beta-strand that integrates into the beta-sheet of the other subunit in the homodimer, a probable biological unit of this superfamily
    uperfamily
  56. Rnp2-like [160350] (1)
    contains extra C-terminal helix
  57. Bacterial polysaccharide co-polymerase-like [160355] (1)
    Decorated common fold with extra helical regions, which facilitate oligomerization
  58. MTH889-like [160363] (1)
    assembles into hexameric ring-like structures with the formation of a singe beta-barrel sheet of 24 strands
  59. Ribosomal protein L10-like [160369] (1)
    consists of globular N-terminal domain, structurally similar to NDK, and the L7/L12-binding C-terminal alpha-helical tail
130. PurS-like [109622] (1)
  consists of two alpha+beta subdomains with some similarity to the ferredoxin-like fold
  1. PurS-like [82697] (2)
    segment-swapped dimer: the swapped segment is made of the first helix and second strand; a single long strand is formed by strands 2 and 3 of each subunit
    uperfamily
131. RplX-like [160373] (1)
  beta(2)-alpha-beta-alpha; 3 layers, a/b/a; antiparallel beta-sheet, order: 213; some structural similarity to the PurS subunit/repeat (scop_cf 109622)
  1. RplX-like [160374] (1)
    similar structural motif to the Ribosomal S24e family (scop_fa 117786); possible structural permutation
132. Dystroglycan, domain 2 [111005] (1)
  beta-alpha-beta-X-beta(2)-alpha(2)-beta; antiparallel beta-sheet, order 24153; topological similarity to the ferredoxin-like fold (scop_cf 54861)
  1. Dystroglycan, domain 2 [111006] (1)
    uperfamily
133. Pseudouridine synthase [100877] (1)
  consists of two alpha+beta subdomains with some similarity to the ferredoxin-like fold
  1. Pseudouridine synthase [55120] (4)
    the active site is the most conserved structural region of the superfamily and is located between the subdomains
    uperfamily
134. SP0830-like [160378] (1)
  duplication: two beta-alpha-beta(2)-alpha-beta-alpha motifs are organized in ferredoxin-like subdomains swapped with the extra C-terminal helices
  1. SP0830-like [160379] (1)
135. Folate-binding domain [103024] (1)
  duplication: consists of two beta(2)-alpha-beta(3)-alpha subdomains swapped with the first strands
  1. Folate-binding domain [103025] (2)
    some topological similarity to Formylmethanofuran:tetrahydromethanopterin formyltransferase
    uperfamily
136. THUMP domain [143436] (1)
  contains mixed 8-stranded beta-sheet, folded into a half-barrel and covered with 4 helices on the outside; order 32148756; strands 5, 6 and 7 are parallel
  1. THUMP domain-like [143437] (3)
    predicted RNA-binding function
    uperfamily
137. AMMECR1-like [143446] (1)
  duplication; contains two beta(2)-alpha-beta(2) structural repeats, swapped with C-terminal strands; extra N-terminal helix and C-terminal strand
  1. AMMECR1-like [143447] (1)
    uperfamily
138. NosL/MerB-like [160386] (1)
  unusual fold; comprises two structural repeats of beta(2)-alpha-beta motifs, forming separate beta-sheets; probable duplication
  1. NosL/MerB-like [160387] (2)
139. YehU-like [118000] (1)
  beta-alpha(2)-beta(2)-alpha; 3 layers, alpha/beta/alpha; antiparallel beta-sheet: order 123
  1. YehU-like [118001] (1)
    uperfamily
140. Hypothetical protein YwqG [103031] (1)
  duplication: contains two similar beta-x-beta(4) motifs swapped with the first strands
  1. Hypothetical protein YwqG [103032] (1)
    uperfamily
141. VC0467-like [143455] (1)
  complex fold; contains bifurcated beta-sheet structure folded into pseudo barrel
  1. VC0467-like [143456] (1)
    uperfamily
142. Lesion bypass DNA polymerase (Y-family), little finger domain [100878] (1)
  beta-alpha-beta(2)-alpha-beta; antiparallel beta-sheet: order 1423; "reversed" ferredoxin-like topology
  1. Lesion bypass DNA polymerase (Y-family), little finger domain [100879] (1)
    uperfamily
143. ImmE5-like [143468] (1)
  alpha-beta(2)-alpha-beta; 2 layers, a/b; antiparallel beta-sheet, order 213
  1. ImmE5-like [143469] (1)
    uperfamily
144. Ribosomal protein L30p/L7e [55128] (1)
  core: beta-alpha-beta-alpha-beta; antiparallel beta-sheet: order 312; some similarity to the ferredoxin-like fold
  1. Ribosomal protein L30p/L7e [55129] (1)
    uperfamily
145. Chorismate lyase-like [64287] (1)
  duplication of alpha(2)-beta(3) motif; antiparallel beta sheet, order 123654
  1. Chorismate lyase-like [64288] (3)
    uperfamily
146. YdfO-like [160418] (1)
  duplication: two alpha(2)-beta(3) motifs are related by pseudo twofold symmetry; single antiparrallel beta-sheet, order:321456
  1. YdfO-like [160419] (1)
147. TM1622-like [143476] (1)
  alpha-beta(3)-alpha-beta(4)-alpha; 3 layers, a/b/a; antiparallel beta-sheet, order: 1237654
  1. TM1622-like [143477] (1)
    uperfamily
148. BH3703-like [160423] (1)
  alpha-beta(3)-alpha-beta(2)-alpha(2); antiparallel beta-sheet, order:32145; duplication: two alpha-beta(2) structural repeats are arranged with pseudo twofold symmetry
  1. BH3703-like [160424] (1)
149. Probable bacterial effector-binding domain [55135] (1)
  duplication of beta-alpha-beta(2) motif: antiparallel beta sheet forms barrel (n=6, S=12)
  1. Probable bacterial effector-binding domain [55136] (4)
    uperfamily
150. CheC-like [103038] (1)
  duplication: tandem repeat of two intertwined alpha-beta-(X)-beta(2) motifs
  1. CheC-like [103039] (1)
    uperfamily
151. LigT-like [55143] (1)
  duplication of beta-alpha-beta-alpha-beta motif: antiparallel beta sheet forms barrel (n=6, S=8) similar to the barrel of prokaryotic DNA topoisomerases I and III
  1. LigT-like [55144] (4)
    uperfamily
152. Pepsin inhibitor-3 [55148] (1)
  duplication of beta(3)-alpha(2) motif: meander beta sheets form barrel-like structure
  1. Pepsin inhibitor-3 [55149] (1)
    uperfamily
153. CYTH-like phosphatases [55153] (1)
  duplication of beta-alpha-beta(3) motif: antiparallel beta sheet forms wide barrel (n=8, S=16) with a channel running through it
  1. CYTH-like phosphatases [55154] (2)
    uperfamily
154. Antiparallel beta/alpha barrel (PT-barrel) [143491] (1)
  tandem repeat of five alpha(2)-beta(2) motifs; antiparallel beta-sheet barrel, closed; n=10, S=10; order 123456789A; there is a channel along the barrel axis
  1. Prenyltransferase-like [143492] (1)
    the barrel channel harbours the substrate-binding site
    uperfamily
155. eIF1-like [55158] (2)
  beta(2)-alpha-beta(2)-alpha-beta; 2 layers: alpha/beta; mixed beta-sheet: order 51243
  1. eIF1-like [55159] (1)
    uperfamily
  2. TM1457-like [118010] (1)
    forms a homodimer via alpha-helical interface
    uperfamily
156. Hedgehog/DD-peptidase [55165] (1)
  alpha-beta(2)-alpha-beta(2); 2 layers: alpha/beta
  1. Hedgehog/DD-peptidase [55166] (5)
    zinc-binding motif
    uperfamily
157. Alpha-L RNA-binding motif [55173] (1)
  alpha(2)-beta(2)-loop-beta; 2 layers: alpha/beta
  1. Alpha-L RNA-binding motif [55174] (5)
    common motif in otherwise different folds
    uperfamily
158. RRF/tRNA synthetase additional domain-like [55185] (4)
  core: alpha-beta(2)-alpha-beta(2); 2 layers: alpha/beta
  1. ThrRS/AlaRS common domain [55186] (2)
    putative editing domain found in the N-terminal part of ThrRS, the C-terminal of AlaRS, and as a stand-alone protein; probable circular permutation of LuxS (d.185.1.2)
    uperfamily
  2. Arginyl-tRNA synthetase (ArgRS), N-terminal 'additional' domain [55190] (1)
    uperfamily
  3. Ribosome recycling factor, RRF [55194] (1)
    uperfamily
  4. General secretion pathway protein M, EpsM [103054] (1)
    uperfamily
159. LuxS/MPP-like metallohydrolase [63410] (1)
  core: beta-alpha-beta(2)-alpha(2); 2 layers: alpha/beta
  1. LuxS/MPP-like metallohydrolase [63411] (2)
    Share the same "active site motif" HxxEH located in the first core helix, but differ in one of the zinc-binding residues
    uperfamily
160. IF3-like [55199] (8)
  beta-alpha-beta-alpha-beta(2); 2 layers; mixed sheet 1243, strand 4 is antiparallel to the rest
  1. Translation initiation factor IF3, C-terminal domain [55200] (1)
    uperfamily
  2. YhbY-like [75471] (1)
    uperfamily
  3. SirA-like [64307] (1)
    uperfamily
  4. AlbA-like [82704] (2)
    uperfamily
  5. C-terminal domain of ProRS [64586] (1)
    contains a metal (zinc)-binding site
    uperfamily
  6. R3H domain [82708] (1)
    possibly lacks the N-terminal strand of the common fold
    uperfamily
  7. EPT/RTPC-like [55205] (2)
    uperfamily
  8. SMR domain-like [160443] (1)
161. PUG domain-like [143502] (1)
  alpha(2)-beta-alpha(2)-beta(2)-alpha; cluster of helices with a small antiparallel beta-sheet on one side; order 132; topological similarity to the fold of an extended R3H domain (PDB 1whr)
  1. PUG domain-like [143503] (1)
    uperfamily
162. PG1857-like [160447] (1)
  alpha-beta-alpha-beta(2)-alpha(3); 3 layers, a/b/a; antiparallel beta-sheet, order: 132
  1. PG1857-like [160448] (1)
163. PB2 C-terminal domain-like [160452] (1)
  alpha-beta-alpha-X-alpha-beta(2); 3 layers, a/b/a; antiparallel beta-sheet, order 132; connection between helices 2 and 3 runs over the edge of the beta-sheet
  1. PB2 C-terminal domain-like [160453] (1)
164. Ribosome binding protein Y (YfiA homologue) [69753] (1)
  beta-alpha-beta(3)-alpha; 2 layers; mixed sheet 1234, strand 3 is antiparallel to the rest
  1. Ribosome binding protein Y (YfiA homologue) [69754] (1)
    uperfamily
165. TolA/TonB C-terminal domain [74652] (1)
  beta(2)-alpha-beta; 2 layers, alpha/beta; left-handed beta-alpha-beta unit in non-swapped monomer
  1. TolA/TonB C-terminal domain [74653] (2)
    uperfamily
166. Yeast killer toxins [55220] (1)
  beta-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta; left-handed crossover connection
  1. Yeast killer toxins [55221] (2)
    uperfamily
167. Cell division protein MinE topological specificity domain [55228] (1)
  dimer of alpha-beta(2) motifs ; 2 layers, alpha/beta
  1. Cell division protein MinE topological specificity domain [55229] (1)
    uperfamily
168. Hypothetical protein YoaG [103062] (1)
  dimer of beta(2)-alpha motifs ; 2 layers, alpha/beta; reverse MinE topology
  1. Hypothetical protein YoaG [103063] (1)
    uperfamily
169. BLRF2-like [160458] (1)
  homodimer of alpha(2)-beta motif; also includes extra N-terminal helix of variable position
  1. BLRF2-like [160459] (1)
170. Nucleocapsid protein dimerization domain [103067] (1)
  dimer of alpha-beta(2)-alpha motifs ; 2 layers, alpha/beta
  1. Nucleocapsid protein dimerization domain [103068] (2)
    uperfamily
171. Cyanase C-terminal domain [55233] (1)
  intertwined dimer of alpha-beta(2) motifs ; 2 layers, alpha/beta
  1. Cyanase C-terminal domain [55234] (1)
    uperfamily
172. Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains [82713] (1)
  Intertwined pseudo hexamer of an alpha+beta motif
  1. Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains [82714] (1)
    duplication: the N- and C-terminal halves of the whole proteins are structurally similar
    uperfamily
173. RuBisCO, small subunit [55238] (1)
  alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta
  1. RuBisCO, small subunit [55239] (1)
    uperfamily
174. DCoH-like [55247] (5)
  beta(2)-alpha-beta(2)-alpha; 2 layers, alpha/beta
  1. PCD-like [55248] (1)
    has additional alpha helix at the N-terminus
    uperfamily
  2. C-terminal domain of arginine repressor [55252] (1)
    forms trimers with three closely packed beta-sheets
    uperfamily
  3. RBP11-like subunits of RNA polymerase [55257] (2)
    form homo and heterodimers
    uperfamily
  4. GAD domain-like [55261] (2)
    uperfamily
  5. PH0987 N-terminal domain-like [160467] (1)
175. TRCF domain-like [143516] (1)
  beta-alpha(3)-beta(2)-alpha-beta(2)-alpha; 2 layers: alpha/beta; mixed beta sheet, order 12354, strands 1 and 2 are parallel; some topological similarity to the DCoH-like fold (scop_cf 55247)
  1. TRCF domain-like [143517] (1)
    uperfamily
176. NMB0513-like [160471] (1)
  alpha(3)-beta(2)-alpha-beta(2); some similarity to the "winged helix" DNA-binding domain fold
  1. NMB0513-like [160472] (1)
177. PA1123-like [160476] (1)
  irregular array of short helices and two three-stranded beta-sheets
  1. PA1123-like [160477] (1)
178. Hypothetical protein Yml108w [100886] (1)
  beta(2)-alpha-beta(2)-alpha; 2 layers, alpha/beta; mixed beta-sheet 2143, strands 1 and 4 are parallel
  1. Hypothetical protein Yml108w [89975] (1)
    uperfamily
179. MutS N-terminal domain-like [55266] (2)
  beta(2)-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta
  1. tRNA-intron endonuclease N-terminal domain-like [55267] (1)
    uperfamily
  2. DNA repair protein MutS, domain I [55271] (1)
    uperfamily
180. GYF/BRK domain-like [55276] (2)
  beta(2)-alpha-beta(2)-alpha; 2 layers, alpha/beta
  1. GYF domain [55277] (1)
    uperfamily
  2. BRK domain-like [160481] (1)
181. GTP cyclohydrolase I feedback regulatory protein, GFRP [69760] (1)
  beta(2)-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta, antiparallel beta-sheet: order 342165
  1. GTP cyclohydrolase I feedback regulatory protein, GFRP [69761] (1)
    uperfamily
182. RL5-like [55281] (1)
  beta-alpha-beta(2)-alpha-beta(3)-alpha; 2 layers, alpha/beta; antiparallel beta-sheet: order 231654
  1. RL5-like [55282] (2)
    uperfamily
183. RPB5-like RNA polymerase subunit [55286] (1)
  core: beta-alpha-beta-alpha-beta(2); 2 layers, alpha/beta
  1. RPB5-like RNA polymerase subunit [55287] (1)
    uperfamily
184. Bacillus chorismate mutase-like [55297] (9)
  core: beta-alpha-beta-alpha-beta(2); mixed beta-sheet: order: 1423, strand 4 is antiparallel to the rest
  1. YjgF-like [55298] (2)
    forms trimers with three closely packed beta-sheets; possibly related to the IspF (d.79.5) and 4'-phosphopantetheinyl transferase superfamilies (d.150.1)
    uperfamily
  2. IpsF-like [69765] (1)
    forms trimers with three closely packed beta-sheets; possible link between the YjgF-like (d.79.1) and 4'-phosphopantetheinyl transferase superfamilies (d.150.1)
    uperfamily
  3. Tubulin C-terminal domain-like [55307] (1)
    uperfamily
  4. L30e-like [55315] (3)
    uperfamily
  5. PurM N-terminal domain-like [55326] (1)
    uperfamily
  6. Holliday junction resolvase RusA [103084] (1)
    uperfamily
  7. OmpA-like [103088] (1)
    uperfamily
  8. YueI-like [160515] (1)
  9. BB2672-like [160519] (1)
    contains extra N-terminal strand and a beta-hairpin insertion between strands 3 and 4 that packs against the main beta-sheet
185. YjbQ-like [111037] (1)
  beta(2)-alpha-beta(2)-alpha(2)-beta(3); contains a beta-sandwich: 7 strands in 2 sheets; trimerizes with orthogonally packed beta-sheets
  1. YjbQ-like [111038] (1)
    uperfamily
186. Tautomerase/MIF [55330] (1)
  (beta-alpha-beta)2; 2 layers: alpha/beta; mixed beta-sheet
  generally forms trimers with three closely packed beta-sheets
  1. Tautomerase/MIF [55331] (6)
    uperfamily
187. FwdE/GAPDH domain-like [55346] (4)
  core: alpha-beta-alpha-beta(3); mixed sheet: 2134, strand 2 is parallel to strand 1
  1. Glyceraldehyde-3-phosphate dehydrogenase-like, C-terminal domain [55347] (5)
    N-terminal domain is the classic Rossmann-fold
    uperfamily
  2. Serine metabolism enzymes domain [143548] (2)
    contains extra C-terminal beta-hairpin
    uperfamily
  3. FwdE-like [143555] (1)
    contains extra N-terminal and C-terminal structures
    uperfamily
  4. V-type ATPase subunit E-like [160527] (1)
    extra N-terminal helix and extra C-terminal helix form dimerisation subdomain
188. Ava3019-like [160531] (1)
  alpha(2)-beta-alpha-beta(4); 2 layers, a/b; antiparallel beta-sheet, order: 32145; similarity to the insert domain of Glucose 6-phosphate dehydrogenase-like family (sop_fa 55376)
  1. Ava3019-like [160532] (1)
189. Hypothetical protein PF0899 [111056] (1)
  alpha-beta-alpha-beta(4); 2 layers: a/b; mixed beta-sheet, order 23145, strands 1 and 3 are parallel; similar to the GAPDH C-terminal domain-like fold (scop_cf 55346)
  1. Hypothetical protein PF0899 [111057] (1)
    possibly related to Major capsid protein gp5 (scop_sf 56563)63566
    uperfamily
190. Major capsid protein gp5 [56562] (1)
  unusual fold; contains PF0899-like core, decorated with additional structure
  1. Major capsid protein gp5 [56563] (1)
    possibly related to the hypothetical protein PF0899 superfamily (scop_sf 111057)
    uperfamily
191. MK0786-like [143559] (1)
  alpha(2)-beta(4); 2 layers: a/b; antiparallel beta-sheet, order 1234 (meander)
  1. MK0786-like [143560] (1)
    probable biological unit is a teramer; all subunit interfaces are provided by helices
    uperfamily
192. YkuJ-like [143566] (1)
  alpha-beta(4)-alpha; 2 layers a/b; antiparallel beta-sheet, order 1234
  1. YkuJ-like [143567] (1)
    uperfamily
193. N domain of copper amine oxidase-like [55382] (5)
  alpha-beta(5)-alpha; 2 layers: alpha/beta; meander antiparallel sheet
  1. Copper amine oxidase, domain N [55383] (1)
    uperfamily
  2. Frataxin/Nqo15-like [55387] (2)
    uperfamily
  3. Hypothetical protein c14orf129, hspc210 [103107] (1)
    uperfamily
  4. GAS2 domain-like [143575] (1)
    this superfamily may include the most C-terminal domain of IBP39 (scop_fa 103410); the preceeding (middle) domain of IBP39 may be split and reassigned to the EF-hand superfamily (scop_sf 47473)
    uperfamily
  5. GK1464-like [143579] (1)
    dimer; pseudo barrel; the true dimeric barrel formation requires swapping of the C-ternimal beta-alpha units
    uperfamily
194. Aha1/BPI domain-like [55393] (2)
  core: [beta]-alpha-beta(5)-alpha; 2 layers: alpha/beta; antiparallel beta-sheet, meander
  1. Activator of Hsp90 ATPase, Aha1 [103111] (1)
    consists of a single domain of this fold
    uperfamily
  2. Bactericidal permeability-increasing protein, BPI [55394] (1)
    duplication: consists of two clear structural repeats of this fold also containing an extra C-terminal beta-hairpin
    uperfamily
195. SpoVG-like [160536] (1)
  beta(5)-alpha; comprises a coiled antiparallel beta-sheet (order: 12345) packed against the C-terminal helix; the extensions of strands 4 and 5 form an isolated beta-hairpin
  1. SpoVG-like [160537] (1)
    probable biological unit is a hexamer (trimer of dimers)
196. Subtilisin inhibitor [55398] (1)
  alpha+beta sandwich
  1. Subtilisin inhibitor [55399] (1)
    uperfamily
197. RNA bacteriophage capsid protein [55404] (1)
  6-standed beta-sheet followed with 2 helices; meander
  1. RNA bacteriophage capsid protein [55405] (1)
    uperfamily
198. eIF4e-like [55417] (1)
  beta(2)-alpha-beta(2)-alpha-beta(2)-alpha-beta-2; 2 layers: alpha/beta; antiparallel sheet: 21356478
  1. eIF4e-like [55418] (2)
    uperfamily
199. CO dehydrogenase flavoprotein C-domain-like [55423] (2)
  core: beta(3,4)-alpha(3); alpha+beta sandwich
  1. FAD/NAD-linked reductases, dimerisation (C-terminal) domain [55424] (1)
    both first two domains are of same beta/beta/alpha fold
    uperfamily
  2. CO dehydrogenase flavoprotein C-terminal domain-like [55447] (1)
    uperfamily
200. SRF-like [55454] (1)
  alpha-beta(2)-alpha; dimer; 3 layers a/b/a; antiparallel beta-sheet
  1. SRF-like [55455] (1)
    uperfamily
201. Origin of replication-binding domain, RBD-like [55463] (1)
  alpha-beta-alpha-beta(2)-alpha-beta-alpha-beta; 3 layers: a/b/a; antiparallel sheet 41325
  1. Origin of replication-binding domain, RBD-like [55464] (5)
    uperfamily
202. SARS receptor-binding domain-like [143586] (1)
  core: 3 layers, a/b/a; antiparallel beta-sheet of 5 strands, order 13542
  1. SARS receptor-binding domain-like [143587] (1)
    uperfamily
203. Hut operon positive regulatory protein HutP [111063] (1)
  alpha(2)-beta-alpha(2)-beta(3); 3 layers: a/b/a; antiparallel beta-sheet: order 1234
  1. Hut operon positive regulatory protein HutP [111064] (1)
    uperfamily
204. Hypothetical protein yfbM [111068] (1)
  beta-alpha(2)-beta-alpha(2)-beta(2)-alpha(n)-beta; 3 layers: a/b/a; antiparallel beta-sheet, order: 21543
  1. Hypothetical protein yfbM [111069] (1)
    uperfamily
205. TTHA1528-like [143591] (1)
  beta-alpha-beta(3)-alpha-beta-alpha(2)-beta; 3 layers: a/b/a; mixed beta-sheet, order: 143256, parallel strands' pairs are 1-4 and 2-5
  1. TTHA1528-like [143592] (1)
    uperfamily
206. YojJ-like [143596] (1)
  alpha-beta-X-beta-alpha-beta(2)-alpha-beta(3); 3 layers: a/b/a; 7-stranded mixed beta-sheet, order 2431567; strands 1 and 3 are parallel to each other
  1. YojJ-like [143597] (1)
    uperfamily
207. STIV B116-like [143601] (1)
  subunit fold consists of mixed 5-stranded beta-sheet, order:31452, strand 5 is antiparallel to the rest, with 3 helices on one side; dimerises with the formation of a single 10-stranded beta-sheet; strand 2 is in the dimer interface
  1. STIV B116-like [143602] (1)
    uperfamily
208. Bacillus phage protein [111073] (1)
  alpa-beta(3)-alpha-beta(3)-alpha; 3 layers: b/a/b, 3-helical bundle flanked by two 3-stranded meander beta-sheets
  1. Bacillus phage protein [111074] (1)
    uperfamily
209. FMN-dependent nitroreductase-like [55468] (1)
  core: (alpha-beta-alpha-beta)2; 3 layers a/b/a; antiparallel beta-sheet: 1243
  1. FMN-dependent nitroreductase-like [55469] (2)
    uperfamily
210. N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1 [55480] (1)
  alpha-beta-alpha(2)-beta(3)-alpha; 3 layers a/b/a; antiparallel beta-sheet: 4123
  1. N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1 [55481] (1)
    uperfamily
211. EscU C-terminal domain-like [160543] (1)
  alpha-beta(3)-alpha-beta-alpha(2); 3 layers, a/b/a; mixed beta-sheet, order: 4123, strand 2 is antiparallel to the rest
  1. EscU C-terminal domain-like [160544] (1)
212. Zincin-like [55485] (2)
  contains mixed beta sheet with connection over free side of the sheet
  1. Metalloproteases ("zincins"), catalytic domain [55486] (17)
    uperfamily
  2. beta-N-acetylhexosaminidase-like domain [55545] (3)
    contains similar fold but lacks its catalytic centre
    uperfamily
213. SH2-like [55549] (1)
  3 layers: a/b/a; antiparallel beta-sheet of 5 strands is flaked by two helices
  1. SH2 domain [55550] (1)
    uperfamily
214. HPr-like [55593] (2)
  beta-alpha-beta(2)-alpha-beta-alpha; 2 layers: a/b; antiparallel sheet 1423
  1. HPr-like [55594] (1)
    uperfamily
  2. Putative transcriptional regulator TM1602, C-terminal domain [75500] (1)
    uperfamily
215. TrkA C-terminal domain-like [116725] (1)
  beta-X-beta(2)-X-beta-alpha; pseudo barrel capped by helix at one end; topological similarity to the HPr-like fold
  1. TrkA C-terminal domain-like [116726] (1)
    uperfamily
216. Hypothetical protein YjiA, C-terminal domain [90001] (1)
  beta-alpha-beta(4)-alpha; 2 layers: a/b; antiparallel sheet 15234; topological similarity to the HPr-like fold
  1. Hypothetical protein YjiA, C-terminal domain [90002] (1)
    uperfamily
217. YggU-like [69785] (1)
  beta(2)-loop-alpha-beta(2)-alpha; 2 layers: a/b; antiparallel sheet 1243; some similarity to the Homing endonuclease-like fold
  1. YggU-like [69786] (1)
    uperfamily
218. Homing endonuclease-like [55603] (2)
  alpha-beta(2)-alpha-beta(2)-alpha; 2 layers: a/b; antiparallel sheet 1243
  1. Glucose permease domain IIB [55604] (1)
    uperfamily
  2. Homing endonucleases [55608] (2)
    uperfamily
219. T-fold [55619] (2)
  beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1234
  tunnel-shaped: its known members form wide oligomeric barrels different sizes
  1. Tetrahydrobiopterin biosynthesis enzymes-like [55620] (4)
    bind purine or pterin in topologically similar sites between subunits
    uperfamily
  2. ApbE-like [143631] (2)
    duplication: contains two differently decorated beta(2)-alpha(2)-beta(2) subdomains, similar to other T-fold domains; probably does not form the tunnel-shaped oligomers
    uperfamily
220. Cell cycle regulatory proteins [55636] (1)
  beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1243
  can form strand-exchange dimers
  1. Cell cycle regulatory proteins [55637] (1)
    uperfamily
221. YonK-like [160569] (1)
  intertwined dimer of beta(3)-alpha-beta subunits; assembles further in octamer with formation of a wide 16-stranded beta-barrel
  1. YonK-like [160570] (1)
    (Pro)phage and phage-related proteins
222. BLIP-like [55647] (2)
  alpha(2)-beta(4); 2 layers: alpha/beta
  1. beta-lactamase-inhibitor protein, BLIP [55648] (1)
    uperfamily
  2. BT0923-like [160574] (1)
    Duplication: tandem repeat of two similar structural subdomains, which associate like the BLIP repeats but differ from them by transposition of the helices
223. Ribosomal protein L9 C-domain [55652] (1)
  alpha-beta-alpha(2)-beta(2); 2 layers: alpha/beta
  1. Ribosomal protein L9 C-domain [55653] (1)
    uperfamily
224. MbtH/L9 domain-like [55657] (2)
  beta(2)-alpha-beta-alpha; 3 layers: alpha/beta/alpha
  1. L9 N-domain-like [55658] (2)
    uperfamily
  2. MbtH-like [160582] (1)
    the first helix is replaced with an extended loop; contains extra C-terminal helix of variable position
225. Tombusvirus P19 core protein, VP19 [103144] (1)
  beta(2)-alpha-beta(2)-alpha; 2 layers: alpha/beta; antiparallel sheet: order 2134
  1. Tombusvirus P19 core protein, VP19 [103145] (1)
    uperfamily
226. Ribonuclease PH domain 2-like [55665] (1)
  beta(2)-alpha-beta(2)-alpha; 3 layers: alpha/beta/alpha; antiparallel sheet: order 2134
  1. Ribonuclease PH domain 2-like [55666] (1)
    uperfamily
227. Regulatory factor Nef [55670] (1)
  alpha(2)-beta(4)-alpha; 3 layers: alpha/beta/alpha
  1. Regulatory factor Nef [55671] (1)
    uperfamily
228. CytB endotoxin-like [55675] (1)
  core: beta-alpha(2)-beta-alpha(2)-beta(4); 3 layers: a/b/a
  1. CytB endotoxin-like [55676] (1)
    uperfamily
229. Class II aaRS and biotin synthetases [55680] (1)
  contains large mixed beta-sheet
  1. Class II aaRS and biotin synthetases [55681] (4)
    uperfamily
230. Subdomain of clathrin and coatomer appendage domain [55710] (1)
  beta-alpha-beta-alpha-beta(4)-alpha; 3 layers: a/b/a; bifurcated antiparallel beta-sheet
  1. Subdomain of clathrin and coatomer appendage domain [55711] (2)
    uperfamily
231. SCP-like [55717] (1)
  alpha-beta(3)-(crossover)-beta-(alpha)-beta; 3 layers: a/b/a; antiparallel beta-sheet of 5 strands; order: 32145
  1. SCP-like [55718] (4)
    uperfamily
232. Ta1353-like [103164] (1)
  core: beta-alpha-beta(2)-alpha-beta-alpha-beta; 3 layers: a/b/a; antiparallel beta-sheet of 5 strands; order: 51423;
  1. Ta1353-like [103165] (1)
    uperfamily
233. Mog1p/PsbP-like [55723] (1)
  (beta-hairpin)-beta(3)-alpha-beta(4)-alpha; 3 layers: a/b/a; antiparallel beta-sheet of 7 strands; order: 1237654
  1. Mog1p/PsbP-like [55724] (4)
    uperfamily
234. SMI1/KNR4-like [160630] (1)
  alpha(4)-beta(4)-alpha; 3 layers: a/b/a; antiparallel beta-sheet, order 1234(meander)
  1. SMI1/KNR4-like [160631] (1)
235. Acyl-CoA N-acyltransferases (Nat) [55728] (1)
  3 layers: a/b/a; contains mixed beta-sheet
  1. Acyl-CoA N-acyltransferases (Nat) [55729] (10)
    uperfamily
236. Gelsolin-like [55752] (3)
  3 layers: a/b/a; contains mixed beta-sheet
  1. Actin depolymerizing proteins [55753] (2)
    uperfamily
  2. C-terminal, gelsolin-like domain of Sec23/24 [82754] (1)
    uperfamily
  3. FLJ32549 C-terminal domain-like [160651] (1)
    alpha-beta(2)-alpha-beta(3)-alpha; similar to the Roadblock/LC7 domain
237. PHP14-like [143723] (1)
  beta(3)-alpha-beta(2)-alpha-beta; 3 layers, a/b/a; mixed beta-sheet, half-barrel, order: 132456; strands 2 and 5 are antiparallel to the rest
  1. PHP14-like [143724] (2)
    uperfamily
238. Profilin-like [55769] (10)
  core: 2 alpha-helices and 5-stranded antiparallel sheet: order 21543; 3 layers: alpha/beta/alpha
  1. Profilin (actin-binding protein) [55770] (1)
    alpha-beta(2)-alpha-beta(5)-alpha
    uperfamily
  2. GAF domain-like [55781] (4)
    alpha(2)-beta(3)-alpha-beta(3)-alpha; antiparallel beta-sheet: order 321654
    uperfamily
  3. PYP-like sensor domain (PAS domain) [55785] (7)
    alpha-beta(2)-alpha(2)-beta(3)
    uperfamily
  4. Pheromone-binding domain of LuxR-like quorum-sensing transcription factors [75516] (1)
    alpha(2)-beta(2)-alpha(2)-beta(3)-alpha; possibly related to the PAS domain
    uperfamily
  5. Sensory domain-like [103190] (3)
    alpha(2)-beta(2)-alpha(2)-beta(3); possibly related to the PAS domain
    uperfamily
  6. SNARE-like [64356] (4)
    beta(2)-alpha-beta(3)-alpha(2)
    uperfamily
  7. Roadblock/LC7 domain [103196] (1)
    alpha-beta(2)-alpha-beta(3)-alpha; structurally most similar to the SNARE-like superfamily with a circular permutation of the terminal helices
    uperfamily
  8. YeeU-like [143737] (1)
    beta(2)-alpha-beta(3); 2 layers, a/b; there is an oligomerization interface instead of the 'missing' helical layer
    uperfamily
  9. GlcG-like [143744] (1)
    alpha-beta(2)-alpha(3)-beta(2)-alpha; similar to the Roadblock/LC7 domain
    uperfamily
  10. YNR034W-A-like [160683] (1)
239. Ligand-binding domain in the NO signalling and Golgi transport [111125] (1)
  an N-terminal helical bundle and the C-terminal alpha-beta(2)-alpha-beta(2) subdomain enclose a ligand-binding cavity
  1. Ligand-binding domain in the NO signalling and Golgi transport [111126] (3)
    uperfamily
240. Phage tail protein-like [143748] (1)
  alpha-beta-X-beta(2)-alpha-beta(2); 2 layers: a/b; mixed beta-sheet: order 12354, strands 1 and 2 are parallel
  1. Phage tail protein-like [143749] (2)
    Can form ring, tube-like oligomers, where the subunit beta-sheets are joined in a single beta-sheet (or barrel)
    uperfamily
241. PR-1-like [55796] (1)
  alpha-beta-alpha-beta-alpha(2)-beta(2); 3 layers, alpha/beta/alpha; mixed sheet: order 1342
  1. PR-1-like [55797] (1)
    uperfamily
242. Phoshotransferase/anion transport protein [55803] (1)
  beta-alpha(2)-beta(3)-alpha(3); 3 layers, alpha/beta/alpha; mixed sheet: order 1342; loop crossing
  1. Phoshotransferase/anion transport protein [55804] (2)
    uperfamily
243. Nudix [55810] (1)
  beta(2)-alpha-beta(3)-alpha; 3 layers: alpha/beta/alpha; mixed sheet
  contains beta-grasp motif
  1. Nudix [55811] (7)
    uperfamily
244. 5'-nucleotidase (syn. UDP-sugar hydrolase), C-terminal domain [55815] (1)
  core: alpha-beta(2)-alpha-beta(2)-alpha-beta; 3 layers; mixed sheet: order 31425
  1. 5'-nucleotidase (syn. UDP-sugar hydrolase), C-terminal domain [55816] (1)
    uperfamily
245. YrdC/RibB [55820] (1)
  core: alpha-beta(2)-alpha-beta-alpha(2)-beta(2)-alpha-beta-alpha-beta; 3 layers; mixed twisted sheet of 7 strands; order 7126354; strands 7 and 1 are parallel to each other
  1. YrdC/RibB [55821] (2)
    uperfamily
246. GIY-YIG endonuclease [82770] (1)
  beta(2)-alpha(2)-beta-alpha-(beta); strand 4 is very short; 3 layers; antiparallel (mixed) beta-sheet; order 312(4)
  1. GIY-YIG endonuclease [82771] (1)
    uperfamily
247. YbaK/ProRS associated domain [55825] (1)
  core: alpha-beta-alpha-beta(2)-(alpha-beta)2-alpha-beta(2)-alpha-beta; 3 layers; bifurcated mixed sheet
  1. YbaK/ProRS associated domain [55826] (1)
    uperfamily
248. Thymidylate synthase/dCMP hydroxymethylase [55830] (1)
  contains large mixed beta-sheet
  1. Thymidylate synthase/dCMP hydroxymethylase [55831] (1)
    uperfamily
249. Thymidylate synthase-complementing protein Thy1 [69795] (1)
  complex alpha+beta fold; contains antiparallel 5-stranded beta-sheet: order 12354
  1. Thymidylate synthase-complementing protein Thy1 [69796] (1)
    uperfamily
250. N-acetylmuramoyl-L-alanine amidase-like [55845] (1)
  contains mixed beta-sheet
  1. N-acetylmuramoyl-L-alanine amidase-like [55846] (1)
    uperfamily
251. Cytochrome b5-like heme/steroid binding domain [55855] (1)
  beta-alpha-beta(2)-alpha(1,2)-(beta)-alpha(2)-beta; 3 layers: a/b/a; antiparallel beta-sheet, order: 1532(4)
  1. Cytochrome b5-like heme/steroid binding domain [55856] (2)
    uperfamily
252. BTG domain-like [160695] (1)
  alpha(2)-beta-alpha(2)-beta(3); four-helical bundle, capped at one end by an antiparallel beta-sheet, order:1234
  1. BTG domain-like [160696] (1)
253. DUSP-like [143790] (1)
  alpha-beta-alpha-X-beta-alpha-beta; three-helical bundle capped at one end by antiparallel beta-sheet, order: 213
  1. DUSP-like [143791] (1)
    uperfamily
254. DNA topoisomerase I domain [55868] (1)
  beta(2)-alpha-beta-(alpha)-beta(2); left-handed crossover between strands 2 & 3
  1. DNA topoisomerase I domain [55869] (1)
    uperfamily
255. ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase [55873] (1)
  8-stranded mixed beta-sheet; 2 layers: alpha/beta
  1. ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase [55874] (4)
    uperfamily
256. YehR-like [160703] (1)
  beta(3)-alpha-beta(2)-alpha(3)-beta; 2 layers, a/b; antiparallel beta-sheet, order: 612354
  1. YehR-like [160704] (1)
257. Sporulation response regulatory protein Spo0B [55889] (1)
  core: alpha-beta-alpha-beta(2)-(alpha)-beta(2)
  1. Sporulation response regulatory protein Spo0B [55890] (1)
    Histidine kinase-like fold lacking the kinase ATP-binding site
    uperfamily
258. Ribonuclease Rh-like [55894] (1)
  alpha+beta fold
  1. Ribonuclease Rh-like [55895] (1)
    uperfamily
259. YlxR-like [64375] (1)
  alpha+beta fold; could have evolved from a glucocorticoid receptor-like zinc finger domain
  1. YlxR-like [64376] (1)
    uperfamily
260. YggX-like [111147] (1)
  beta(2)-alpha(3); contains zinc-less 'zinc finger'-like fold (scop_cf 57715; see also scop_cf 64375)
  1. YggX-like [111148] (1)
    uperfamily
261. L28p-like [143799] (1)
  unusual fold consisting of three beta-hairpins, that form a paper clip-like structure, and two helices; could have evolved from a glucocorticoid receptor-like zinc finger domain (scop_cf 57715)
  1. L28p-like [143800] (2)
    In early ribosomal structures, L28p has been misinterpreted as L31p. in the Ribosomal protein L28p family, there are sequences containing two CxxC pairs. Threading these sequences into this fold brings the four cysteines in a similar site to the zinc-binding site of glucocorticoid receptor-like zinc fingers. In the Ribosomal protein L31p, there are also members with two CxxC pairs. However, these won't form a putative zinc-binding site in this fold. The L31p family are classified here temporarily, until its true fold is known
    uperfamily
262. YqaI-like [160712] (1)
  dimeric zinc-less 'zinc finger'-like fold; similar to the C-terminal strand-swapped B-box domain (scop_cf 57844)
  1. YqaI-like [160713] (1)
263. Ornithine decarboxylase C-terminal domain [55903] (1)
  complex alpha+beta motif
  1. Ornithine decarboxylase C-terminal domain [55904] (1)
    uperfamily
264. Pentein, beta/alpha-propeller [55908] (1)
  duplication: composed of 5 alpha-beta(2)-alpha-beta units arranged around pseudo fivefold axis
  1. Pentein [55909] (7)
    uperfamily
265. Creatinase/aminopeptidase [55919] (1)
  duplication: composed of two very similar alpha+beta folds
  1. Creatinase/aminopeptidase [55920] (1)
    uperfamily
266. gpW/gp25-like [160718] (1)
  alpha(2)-beta(3); similar to one structural repeat of the Creatinase/aminopeptidase family and the C-terminal subdomain of PanC
  1. gpW/gp25-like [160719] (1)
    Contains phage tail lysozyme
267. Glutamine synthetase/guanido kinase [55930] (1)
  duplication: common core consists of two beta-alpha-beta2-alpha repeats
  1. Glutamine synthetase/guanido kinase [55931] (5)
    uperfamily
268. TBP-like [55944] (11)
  beta-alpha-beta(4)-alpha
  1. TATA-box binding protein-like [55945] (2)
    uperfamily
  2. MoaD-related protein, C-terminal domain [103239] (1)
    contains a single copy of this fold
    uperfamily
  3. KA1-like [103243] (2)
    contains a single copy of this fold
    uperfamily
  4. TT1751-like [103247] (1)
    contains a single copy of this fold decorated with additional structures; forms dimer
    uperfamily
  5. Cell-division protein ZipA, C-terminal domain [64383] (1)
    contains a single copy of this fold
    uperfamily
  6. Phosphoglucomutase, C-terminal domain [55957] (1)
    contains a single copy of this fold and an extra beta-strand at the C-terminus
    uperfamily
  7. Bet v1-like [55961] (10)
    contains a single copy of this fold with a alpha-beta2 insertion after the first helix; there is a cavity between the beta-sheet and the long C-terminal helix
    uperfamily
  8. Rbstp2229 protein [111171] (1)
    forms segment-swapped dimers further organized in hexamers
    uperfamily
  9. RalF, C-terminal domain [118104] (1)
    contains a single copy of this fold decorated with additional structures
    uperfamily
  10. YwmB-like [143842] (1)
    duplication: tandem repeat of two circularly permuted motifs, alpha-beta-alpha-beta(4), assembled as in the TATA-box binding domain; forms a swapped dimer by exchanging the equivalent parts of the C-terminal motifs
    uperfamily
  11. YugN-like [160755] (1)
269. XisI-like [143846] (1)
  alpha-beta(4)-alpha-beta-alpha; 2 layers, a/b; antiparallel beta-sheet, order 1234, meander; the open side of beta-sheet provides dimerization interface
  1. XisI-like [143847] (1)
    uperfamily
270. S-adenosylmethionine synthetase [55972] (1)
  duplication: consists of 3 similar intertwined domains
  structural repeat: beta-alpha-beta(2)-alpha-beta; two layers, alpha/beta
  1. S-adenosylmethionine synthetase [55973] (1)
    uperfamily
271. DNA clamp [55978] (1)
  contains two helices and two beta sheets
  duplication: fold has internal pseudo two-fold symmetry
  1. DNA clamp [55979] (2)
    uperfamily
272. Hypothetical protein TM0160 [103255] (1)
  duplication: consists of two beta(3)-alpha(2) structural repeats; single barrel-like beta-sheet
  1. Hypothetical protein TM0160 [103256] (1)
    uperfamily
273. TTHC002-like [160760] (1)
  alpha-beta-alpha-beta(3); forms dimer with a single beta-sheet, folded in a barrel-like shape
  1. TTHC002-like [160761] (1)
274. Molybdenum cofactor-binding domain [56002] (1)
  beta(2)-alpha-beta-alpha-beta; 2 layers: a/b; mixed sheet: order 1243: crossing loops
  1. Molybdenum cofactor-binding domain [56003] (1)
    duplication: consists of 4 structural repeats arranged in 2 lobes
    contains one left-hand beta-alpha-beta unit per lobe
    uperfamily
275. NE1680-like [160765] (1)
  beta(2)-alpha-beta-alpha-beta; 2 layers, a/b; antiparallel sheet, order 3124
  1. NE1680-like [160766] (1)
276. Nitrite and sulphite reductase 4Fe-4S domain-like [56013] (1)
  beta-alpha-beta-alpha-beta(3)-alpha(2,3); mixed sheet: order 12345; left-handed crossover connection between strands 1 and 2
  1. Nitrite and sulphite reductase 4Fe-4S domain-like [56014] (1)
    duplication: contains two domains of this fold
    uperfamily
277. DeoB insert domain-like [143855] (1)
  alpha-beta-X-beta(2)-alpha-beta(2); 2 layers, a/b; mixed beta-sheet of 5 strands, order 12345; strands 2 and 5 are antiparallel to the rest
  1. DeoB insert domain-like [143856] (1)
    uperfamily
278. The spindle assembly checkpoint protein mad2 [56018] (1)
  core: alpha(2)-beta(2)-alpha-beta; mixed sheet: order 213
  1. The spindle assembly checkpoint protein mad2 [56019] (1)
    N- and C-termini undergo large conformational rearrangement upon ligand binding
    uperfamily
279. Phospholipase D/nuclease [56023] (1)
  beta-alpha-beta-alpha-beta-alpha-beta(4)-alpha; mixed sheet: order 1765234
  1. Phospholipase D/nuclease [56024] (5)
    uperfamily
280. CorA soluble domain-like [143864] (1)
  beta(2)-alpha-beta-alpha(2)-beta(4)-alpha(3); 3 layers: a/b/a; mixed beta-sheet, order 2137654; strands 3 and 7 are parallel
  1. CorA soluble domain-like [143865] (1)
    uperfamily
281. Monooxygenase (hydroxylase) regulatory protein [56028] (1)
  corner-like structure formed by two sheets and filled in with 2-3 helices
  1. Monooxygenase (hydroxylase) regulatory protein [56029] (1)
    duplication: consists of two beta-alpha-(beta)-beta(2) motifs; some topological similarity to the ferredoxin-like fold
    uperfamily
282. PurM C-terminal domain-like [56041] (1)
  3 layers: alpha/beta/alpha; partial topological similarity to the ferredoxin-like fold
  1. PurM C-terminal domain-like [56042] (1)
    uperfamily
283. PF0523-like [143869] (1)
  beta-alpha-beta-alpha(3)-beta-alpha-beta-alpha; 3 layers, a/b/a; antiparallel beta-sheet, order 4132; some similarity to the PurM C-terminal domain-like fold (scop_cf 56041)
  1. PF0523-like [143870] (1)
    uperfamily
284. Chorismate synthase, AroC [103262] (1)
  duplication: consists of two DCoH-like beta(2)-alpha-beta(2)-alpha structural repeats; 3 layers, beta/alpha/beta
  1. Chorismate synthase, AroC [103263] (1)
    uperfamily
285. Hsp33 domain [64396] (1)
  3 layers: beta/alpha/beta; buried helix
  1. Hsp33 domain [64397] (1)
    uperfamily
286. MTH1598-like [69818] (1)
  beta(2)-alpha-beta-alpha-beta(4); 3 layers: beta/alpha/beta; some similarity to the Hsp33 fold
  1. MTH1598-like [69819] (1)
    uperfamily
287. Protein-L-isoaspartyl O-methyltransferase, C-terminal domain [68929] (1)
  beta-alpha-beta(4)-alpha-beta(2); 3 layers: beta/alpha/beta; buried helix
  1. Protein-L-isoaspartyl O-methyltransferase, C-terminal domain [68930] (1)
    uperfamily
288. OsmC-like [82783] (1)
  swapped dimer of beta(3)-alpha-beta(2)-alpha(2)-beta subunits; mixed beta-sheet; order: 321[4][5][6]; buried helix
  1. OsmC-like [82784] (2)
    uperfamily
289. Hypothetical protein HI1480 [103276] (1)
  beta-alpha(4)-beta-alpha-beta; segregated alpha-helical and beta-sheet subdomains; dimeric beta-sheet barrel: n=6, S=10
  1. Hypothetical protein HI1480 [103277] (1)
    uperfamily
290. ERH-like [143874] (1)
  beta(2)-alpha(2)-beta(2)-alpha; antiparallel beta-sheet, order:2134; helices are arranged in a bundle rather than packed agains beta-sheet; dimerises via with the formation of a flattened beta-barel: closed n=8, S=10
  1. ERH-like [143875] (1)
    uperfamily
291. Ribosomal protein S8 [56046] (1)
  consists of 2 different alpha+beta subdomains arranged in a 4-layer structure: b/a/b/a
  1. Ribosomal protein S8 [56047] (1)
    uperfamily
292. Ribosomal protein L6 [56052] (1)
  consists of two beta-sheets and one alpha-helix packed around single core
  1. Ribosomal protein L6 [56053] (1)
    uperfamily
293. NE0471 N-terminal domain-like [143879] (1)
  beta(3)-alpha(n)-beta(3)-alpha; the two meander beta-sheets and helices are packed against the same core
  1. NE0471 N-terminal domain-like [143880] (1)
    uperfamily
294. Lp2179-like [160799] (1)
  beta(2)-alpha-beta(4)-alpha-beta; contains two antiparallel beta-sheets (orders: 127 and 3456) packed against the longer C-terminal helix
  1. Lp2179-like [160800] (1)
295. RGC domain-like [143884] (1)
  consists of two beta-sheets and four helices eclosing a cental cavity
  1. RGC domain-like [143885] (1)
    uperfamily
296. Smc hinge domain [75552] (1)
  consists of 2 different alpha+beta subdomains; forms subdomain-swapped dimers
  1. Smc hinge domain [75553] (1)
    uperfamily
297. DNA mismatch repair protein MutL [118115] (1)
  consists of two different alpha+beta (sub)domains; d1: [beta(3)-alpha-(insert of d2)-alpha(2)-beta; 2 layers, a/b; antiparallel sheet, order: 1234]; d2: [beta-alpha-beta(2)-alpha(2); 2 layers, a/b; antiparallel sheet, order: 132]
  1. DNA mismatch repair protein MutL [118116] (1)
    uperfamily
298. ATP-grasp [56058] (2)
  Consists of two subdomains with different alpha+beta folds
  shares functional and structural similarities with the PIPK and protein kinase superfamilies
  1. Glutathione synthetase ATP-binding domain-like [56059] (9)
    uperfamily
  2. DNA ligase/mRNA capping enzyme, catalytic domain [56091] (4)
    has a circularly permuted topology
    uperfamily
299. SAICAR synthase-like [56103] (1)
  consists of two alpha+beta subdomains
  1. SAICAR synthase-like [56104] (3)
    shares functional and structural similarities with the ATP-grasp fold and protein kinase superfamilies
    uperfamily
300. Protein kinase-like (PK-like) [56111] (1)
  consists of two alpha+beta domains, C-terminal domain is mostly alpha helical
  1. Protein kinase-like (PK-like) [56112] (7)
    shares functional and structural similarities with the ATP-grasp fold and PIPK
    uperfamily
301. FAD-binding/transporter-associated domain-like [56175] (1)
  consists of two alpha+beta subdomains
  1. FAD-binding/transporter-associated domain-like [56176] (4)
    uperfamily
302. Uridine diphospho-N-Acetylenolpyruvylglucosamine reductase, MurB, C-terminal domain [56193] (1)
  consists of two alpha+beta subdomains
  1. Uridine diphospho-N-Acetylenolpyruvylglucosamine reductase, MurB, C-terminal domain [56194] (1)
    uperfamily
303. Methenyltetrahydromethanopterin cyclohydrolase [56198] (1)
  consists of two alpha+beta subdomains
  1. Methenyltetrahydromethanopterin cyclohydrolase [56199] (1)
    uperfamily
304. Prim-pol domain [56746] (1)
  consists of two alpha+beta domains
  1. Prim-pol domain [56747] (3)
    uperfamily
305. Hect, E3 ligase catalytic domain [56203] (1)
  consists of two alpha+beta domains; the N-terminal domain is array of helices and beta-hairpins; the C-terminal domain is an a/b sandwich with one left-handed beta-alpha(n)-beta unit; conformational flexibility of domain orientation
  1. Hect, E3 ligase catalytic domain [56204] (1)
    uperfamily
306. Nitrile hydratase alpha chain [56208] (1)
  4 layers a/b/b/a; inside is a sandwich of two 2-stranded beta-sheets
  1. Nitrile hydratase alpha chain [56209] (1)
    duplication: contains two structural repeats
    uperfamily
307. 4'-phosphopantetheinyl transferase [56213] (1)
  beta-alpha(3)-beta(2) motif
  1. 4'-phosphopantetheinyl transferase [56214] (2)
    possibly related to the IspF (d.79.5) and YjgF-like superfamilies (d.79.1)
    uperfamily
308. DNase I-like [56218] (1)
  contains beta-sandwich; duplication of alpha+beta motif
  1. DNase I-like [56219] (3)
    uperfamily
309. Aldehyde ferredoxin oxidoreductase, N-terminal domain [56227] (1)
  contains sandwich; duplication of alpha+beta motif with single mixed sheet
  motif: beta(2)-alpha-beta(3)-alpha-beta; strand order 216345, strands 1 and 6 are parallel
  1. Aldehyde ferredoxin oxidoreductase, N-terminal domain [56228] (1)
    uperfamily
310. Ntn hydrolase-like [56234] (2)
  4 layers: alpha/beta/beta/alpha; has an unusual sheet-to-sheet packing
  1. N-terminal nucleophile aminohydrolases (Ntn hydrolases) [56235] (7)
    N-terminal residue provides two catalytic groups, nucleophile and proton donor
    uperfamily
  2. Archaeal IMP cyclohydrolase PurO [75569] (1)
    has a putative active site in the same topological location as the Ntn hydrolase but lacks the N-terminal nucleophile
    uperfamily
311. DmpA/ArgJ-like [56265] (1)
  duplication of beta(3)-alpha-beta-alpha motif; 4 layers: alpha/beta/beta/alpha
  1. DmpA/ArgJ-like [56266] (2)
    convergent similarity to the Ntn amidohydrolases
    uperfamily
312. Pyruvoyl-dependent histidine and arginine decarboxylases [56270] (1)
  duplication of beta-alpha-beta(2) motif; 4 layers: alpha/beta/beta/alpha; contains "silk" beta-sandwich
  1. Pyruvoyl-dependent histidine and arginine decarboxylases [56271] (2)
    two chains result from self-processing single-chain precursor; form heterohexamer
    uperfamily
313. S-adenosylmethionine decarboxylase [56275] (1)
  duplication of beta-alpha-beta(4)-alpha-beta-alpha-beta(2) motif; 4 layers a/b/b/a; antiparallel beta-sheets: order 23451687
  1. S-adenosylmethionine decarboxylase [56276] (2)
    uperfamily
314. Metallo-hydrolase/oxidoreductase [56280] (1)
  duplication of beta(4)-alpha-beta-alpha motif; 4 layers a/b/b/a; mixed beta-sheets
  1. Metallo-hydrolase/oxidoreductase [56281] (14)
    uperfamily
315. PP2C-like [81607] (1)
  4 layers: alpha/beta/beta/alpha; antiparallel beta sheets
  1. PP2C-like [81606] (1)
    contain binuclear metal (Mn) centre
    uperfamily
316. Metallo-dependent phosphatases [56299] (1)
  4 layers: alpha/beta/beta/alpha; mixed beta sheets; contains duplication
  1. Metallo-dependent phosphatases [56300] (12)
    different families of this superfamily are groupped in a single Pfam family, Pfam 00149
    uperfamily
317. Carbon-nitrogen hydrolase [56316] (1)
  4 layers: alpha/beta/beta/alpha; mixed beta sheets; contains duplication
  1. Carbon-nitrogen hydrolase [56317] (2)
    Pfam 00795; some topological similarities to the metallo-dependent phosphatases and DNase I-like nucleases
    uperfamily
318. CNF1/YfiH-like putative cysteine hydrolases [64437] (1)
  4 layers: alpha/beta/beta/alpha; mixed beta sheets
  1. CNF1/YfiH-like putative cysteine hydrolases [64438] (3)
    uperfamily
319. ADC synthase [56321] (1)
  duplication: contains four repeats of alpha-beta(2)-beta motif arranged in a 4 layer core structure: alpha/beta/beta/alpha; orthogonally packed beta-sheets
  1. ADC synthase [56322] (1)
    the active site is formed by additional structures inserted into the core structure
    uperfamily
320. Sulfolobus fructose-1,6-bisphosphatase-like [111248] (1)
  4 layers: a/b/b/a; antiparallel beta sheets; similarities to ferredoxin-like fold (scop_cf 54861) in the N-terminal part (1-120) and to the Bacterial S-adenosylmethionine decarboxylase subunit (scop_fa 997656) in the C-terminal part (121-340)
  1. Sulfolobus fructose-1,6-bisphosphatase-like [111249] (1)
    uperfamily
321. LDH C-terminal domain-like [56326] (1)
  unusual fold, defines family
  1. LDH C-terminal domain-like [56327] (2)
    uperfamily
322. DNA breaking-rejoining enzymes [56348] (1)
  core: alpha3-beta3-alpha4; one side of beta-sheet is exposed
  1. DNA breaking-rejoining enzymes [56349] (2)
    uperfamily
323. Replication modulator SeqA, C-terminal DNA-binding domain [82807] (1)
  consists of seven alpha-helices and three-stranded beta-sheet
  1. Replication modulator SeqA, C-terminal DNA-binding domain [82808] (1)
    uperfamily
324. SMAD MH1 domain [56365] (1)
  consists of four alpha-helices and three beta-ribbons
  1. SMAD MH1 domain [56366] (1)
    uperfamily
325. YopH tyrosine phosphatase N-terminal domain [64448] (1)
  consists of four alpha-helices and two beta-hairpins
  1. YopH tyrosine phosphatase N-terminal domain [64449] (1)
    uperfamily
326. Rotavirus NSP2 fragment, N-terminal domain [75573] (1)
  consists of six alpha-helices and two beta-hairpins
  1. Rotavirus NSP2 fragment, N-terminal domain [75574] (1)
    uperfamily
327. Rv2827c C-terminal domain-like [160886] (1)
  multihelical array flanked by two three-stranded mixed beta-sheets
  1. Rv2827c C-terminal domain-like [160887] (1)
328. Phosphoprotein oligomerization domain-like [160891] (1)
  intertwinned homodimer of beta(2)-alpha-beta(2) motifs; 3 layers: b/a/b; each antiparallel beta-sheet is formed by the N-terminal beta-hairpin of one subunit and the C-terminal beta-hairpin of the other subunit; order 1243
  1. Phosphoprotein oligomerization domain-like [160892] (1)
329. Taf5 N-terminal domain-like [160896] (1)
  multihelical cluster with a C-terminal beta-alpha(2)-beta motif; one central buried helix; parallel beta-ribbon
  1. Taf5 N-terminal domain-like [160897] (1)
330. Jann2411-like [160903] (1)
  unusual fold; consists of seven alpha-helices and three beta-hairpins
  1. Jann2411-like [160904] (1)
331. ATP12-like [160908] (1)
  contains an N-terminal beta-sheet that forms a beta-triangle structure; the remainder is a multihelical array of long and short helices
  1. ATP12-like [160909] (1)
332. Ribosome inactivating proteins (RIP) [56370] (1)
  contains mixed beta-sheet
  1. Ribosome inactivating proteins (RIP) [56371] (2)
    uperfamily
333. ADP-ribosylation [56398] (1)
  unusual fold
  1. ADP-ribosylation [56399] (7)
    uperfamily
334. Peptide deformylase [56419] (1)
  alpha-beta(5)-alpha; 3 layers: a/b/a; meander beta-sheet wraps around the C-terminal alpha-helix
  1. Peptide deformylase [56420] (1)
    nickel-dependent enzyme
    uperfamily
335. LCCL domain [69847] (1)
  unusual fold
  1. LCCL domain [69848] (1)
    uperfamily
336. Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain [56424] (1)
  unusual fold
  1. Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain [56425] (1)
    uperfamily
337. C-type lectin-like [56435] (1)
  unusual fold
  1. C-type lectin-like [56436] (8)
    uperfamily
338. Hemolytic lectin CEL-III, C-terminal domain [111264] (1)
  unusual fold
  1. Hemolytic lectin CEL-III, C-terminal domain [111265] (1)
    uperfamily
339. SRCR-like [56486] (2)
  unusual fold; disulfide-rich; core: beta-x-alpha-beta-loop-beta
  1. SRCR-like [56487] (2)
    uperfamily
  2. A heparin-binding domain [56491] (1)
    uperfamily
340. Fibrinogen C-terminal domain-like [56495] (1)
  unusual fold
  1. Fibrinogen C-terminal domain-like [56496] (1)
    uperfamily
341. gp120 core [56501] (1)
  unusual fold
  1. gp120 core [56502] (1)
    uperfamily
342. Methionine synthase activation domain-like [56506] (1)
  unusual fold; core: beta-alpha(2)-beta(2)-alpha(2)-beta-alpha-beta; antiparallel beta-sheet: order 12354
  1. Methionine synthase activation domain-like [56507] (2)
    uperfamily
343. UbiD C-terminal domain-like [143967] (1)
  alpha-beta(2)-alpha-beta-alpha-beta(2); 3 layers, a/b/a; mixed beta-sheet, order: 12354, strands 2,3 and 5 are parallel to each other
  1. UbiD C-terminal domain-like [143968] (1)
    uperfamily
344. Hypothetical protein TM0875 [90063] (1)
  unusual fold; core: beta(2)-loop-beta(2)-alpha-beta; mixed beta-sheet: order 51243; parallel strands 2 and 4
  1. Hypothetical protein TM0875 [90064] (1)
    uperfamily
345. Metal cation-transporting ATPase, ATP-binding domain N [81661] (1)
  unusual fold; core: beta-alpha(2)-beta(3)-alpha(2)-beta(2); 6-stranded antiparallel beta-sheet, order: 165432
  1. Metal cation-transporting ATPase, ATP-binding domain N [81660] (1)
    uperfamily
346. Suppressor of Fused, N-terminal domain [103358] (1)
  unusual fold; bifurcated beta-sheet; left-handed beta-alpha-beta unit
  1. Suppressor of Fused, N-terminal domain [103359] (1)
    uperfamily
347. Nitric oxide (NO) synthase oxygenase domain [56511] (1)
  unusual fold
  1. Nitric oxide (NO) synthase oxygenase domain [56512] (1)
    uperfamily
348. Penicillin binding protein dimerisation domain [56518] (1)
  unusual fold
  1. Penicillin binding protein dimerisation domain [56519] (1)
    uperfamily
349. Oxidoreductase molybdopterin-binding domain [56523] (1)
  unusual fold; contains 3 layers of beta-sheet structure and a beta-grasp like motif
  1. Oxidoreductase molybdopterin-binding domain [56524] (1)
    uperfamily
350. FAH [56528] (1)
  unusual fold; contains 3 layers of beta-sheet structure
  1. FAH [56529] (1)
    uperfamily
351. Aromatic aminoacid monoxygenases, catalytic and oligomerization domains [56533] (1)
  unusual fold
  1. Aromatic aminoacid monoxygenases, catalytic and oligomerization domains [56534] (1)
    uperfamily
352. Substrate-binding domain of HMG-CoA reductase [56541] (1)
  unusual fold
  1. Substrate-binding domain of HMG-CoA reductase [56542] (1)
    uperfamily
353. Argininosuccinate synthetase, C-terminal domain [69863] (1)
  unusual fold
  1. Argininosuccinate synthetase, C-terminal domain [69864] (1)
    uperfamily
354. Hypothetical protein PH1602 [103364] (1)
  complex alpha+beta fold; contains a region of similarity to the ferredoxin-like fold
  1. Hypothetical protein PH1602 [103365] (1)
    uperfamily
355. IlvD/EDD N-terminal domain-like [143974] (1)
  contains a large cluster of helices and a mixed beta-sheet of 4 strands; order 2134, strands 3 and 4 are parallel
  1. IlvD/EDD N-terminal domain-like [143975] (1)
    uperfamily
356. DNA methylase specificity domain [116733] (1)
  comprises the N-terminal, double beta-helix like structure and C-terminal alpha-hairpin
  1. DNA methylase specificity domain [116734] (2)
    uperfamily
357. GCM domain [90072] (1)
  consists of two different alpha+beta subdomains; 2 zinc-binding sites
  1. GCM domain [90073] (1)
    DNA-binding domain
    uperfamily
358. Conserved core of transcriptional regulatory protein vp16 [56547] (1)
  unusual fold
  1. Conserved core of transcriptional regulatory protein vp16 [56548] (1)
    uperfamily
359. Insert subdomain of RNA polymerase alpha subunit [56552] (1)
  unusual fold; contains a left-handed beta-alpha-beta unit
  1. Insert subdomain of RNA polymerase alpha subunit [56553] (1)
    uperfamily
360. Baseplate structural protein gp11 [56557] (1)
  unusual fold; trimer
  1. Baseplate structural protein gp11 [56558] (1)
    uperfamily
361. Receptor-binding domain of short tail fibre protein gp12 [88873] (1)
  unusual fold; trimer
  1. Receptor-binding domain of short tail fibre protein gp12 [88874] (1)
    uperfamily
362. Outer capsid protein sigma 3 [64464] (1)
  unusual fold
  1. Outer capsid protein sigma 3 [64465] (1)
    uperfamily
363. Phosphoprotein M1, C-terminal domain [118172] (1)
  consists of 6 helices and one beta-hairpin
  1. Phosphoprotein M1, C-terminal domain [118173] (1)
    uperfamily
364. L,D-transpeptidase pre-catalytic domain-like [143984] (1)
  unusual fold, made of four helices and four 2-3 stranded beta-sheets
  1. L,D-transpeptidase pre-catalytic domain-like [143985] (1)
    uperfamily
365. YbiA-like [143989] (1)
  consists of six alpha-helices and two two-stranded beta-sheets
  1. YbiA-like [143990] (1)
    uperfamily
366. NinB [103369] (1)
  unusual fold; intertwined dimer; consists of two different structural domains
  1. NinB [103370] (1)
    uperfamily
367. AF2331-like [143994] (1)
  interlocked dimer of beta-alpha-beta(2)-alpha-beta-(alpha) subunits; 3 layers: b/b/a
  1. AF2331-like [143995] (1)
    uperfamily
368. SSo0622-like [111277] (1)
  alpha(2)-beta(2)-alpha-beta-alpha-beta(2)-alpha; 2 layers: a/b; antiparallel beta-sheet: order 21354; strands 1,3 and 5 and the C-terminal helix are longer than other secondary structures
  1. SSo0622-like [111278] (1)
    the dimer, formed in the crystals, is a probable biological unit
    uperfamily
369. Putative modulator of DNA gyrase, PmbA/TldD [111282] (1)
  consists of two different alpha+beta domains; d1: [duplication of alpha-beta(3)-alpha motif; 2 layers: a/b; antiparallel beta-sheet, order: 321456; strands 1, 2, 4 and 5 are twice longer than other secondary structures]; d2 [ complex fold; contains beta-barrel (n=5, S=10)]
  1. Putative modulator of DNA gyrase, PmbA/TldD [111283] (1)
    uperfamily
370. PSTPO5379-like [160919] (1)
  complex fold; consists of two alpha+beta subdomains, one is inserted in the other
  1. PSTPO5379-like [160920] (1)
371. PG1388-like [160924] (1)
  consists of 2 alpha+beta subdomains, each having a meander beta-sheet; d1: alpha(2)-beta(7); d2: alpha(2)-beta(2)-alpha(2)-beta(2)
  1. PG1388-like [160925] (1)
372. Oxysterol-binding protein-like [143999] (1)
  core: large meander beta-sheet of 12 strands wrapped around the N-terminal (distorted) alpha-hairpin; some similarity to transmembrane beta-barrel proteins
  1. Oxysterol-binding protein-like [144000] (1)
    uperfamily
373. ORC1-binding domain [144004] (1)
  complex fold, composed of an alpha hairpin, meander beta-sheet and a five-stranded barrel of unusual topology
  1. ORC1-binding domain [144005] (1)
    uperfamily
374. CofE-like [144009] (1)
  consists of two different domains; d1: beta-alpha-beta-alpha-beta(2)-alpha-beta, mixed sheet of 5 strands, order:15234, strands 2 and 3 are parralel; d2 is inserted in d1 after strand 2 and comprises a helix-turn-helix motif and two 3-stranded sheets
  1. CofE-like [144010] (1)
    uperfamily
375. Peptidoglycan deacetylase N-terminal noncatalytic region [144014] (1)
  consists of two different domains, d1: [alpha-beta(2)-alpha-beta(3); 3 layers: a/b/a; mixed beta-sheet, order 12345, strands 2 and 3 are parallel to each other with a left-handed crossover connection], d2: alpha-beta(3)-alpha; 2 layers; antiparallel beta-sheet, order 123]
  1. Peptidoglycan deacetylase N-terminal noncatalytic region [144015] (1)
    uperfamily
376. Non-globular alpha+beta subunits of globular proteins [56567] (1)
  not a true fold
  1. Non-globular alpha+beta subunits of globular proteins [56568] (3)
    not a true superfamily
    uperfamily
Multi-domain proteins (alpha and beta) [56572] (66)
Folds consisting of two or more domains belonging to different classes
1. Serpins [56573] (1)
  contains a cluster of helices and a beta-sandwich
  1. Serpins [56574] (1)
    uperfamily
2. FdhE-like [144019] (1)
  consists on the N-terminal five-helical bundle, a tandem repeat of two rubredoxin-like domains and the C-terminal helix packed together
  1. FdhE-like [144020] (1)
    uperfamily
3. FlhC-like [160929] (1)
  3 domains; d1 & d2 are similar three-helical bundles, with d1 containing an HTH motif; d3: zinc finger of a rubredoxin-like fold
  1. FlhC-like [160930] (1)
4. Replication terminator protein (Tus) [56595] (1)
  contains a cluster of helices and a beta-sandwich
  1. Replication terminator protein (Tus) [56596] (1)
    uperfamily
5. VPA0735-like [160934] (1)
  consists of a cluster of helices and two beta-sandwich domains of similar topology; probable duplication
  1. VPA0735-like [160935] (1)
6. 2-methylcitrate dehydratase PrpD [103377] (1)
  consists of an all-alpha and alpha+beta domains
  1. 2-methylcitrate dehydratase PrpD [103378] (1)
    uperfamily
7. Antivirulence factor [103382] (1)
  contains a helical bundle with a buried helix and an alpha+beta insert domain
  1. Antivirulence factor [103383] (1)
    uperfamily
8. Api92-like [160939] (1)
  2 domains; d1: [alpha+beta with similarity to ferredoxin-like fold]; d2: [6 helices, bundle, one buried central helix], inserted into d1
  1. Api92-like [160940] (1)
9. PH0156-like [160944] (1)
  2 (sub)domains; d1: [alpha/beta with central mixed beta-sheet, order: 23415876, similarity to the G protein but no P-loop]; d2: [all-alpha, 5 helices, provides dimerization interface]
  1. PH0156-like [160945] (1)
10. YacF-like [160949] (1)
  2 domains; d1: kinked four-helical bundle, inserted in d2: beta-sandwich of 7 strands in two sheets
  1. YacF-like [160950] (1)
    probable biological unit is a dimer
11. Virulence-associated V antigen [103387] (1)
  consists of an all-alpha and alpha+beta domains connected by antiparallel coiled coil
  1. Virulence-associated V antigen [103388] (1)
    uperfamily
12. Heme-dependent catalase-like [56633] (1)
  contains an (8,10) beta-barrel and an all-alpha domain
  1. Heme-dependent catalase-like [56634] (2)
    uperfamily
13. Acyl-CoA dehydrogenase NM domain-like [56644] (1)
  2 domains: (1) all-alpha: 5 helices; (2) contains an open beta-sheet barrel: n*=5, S*=8; complex topology
  1. Acyl-CoA dehydrogenase NM domain-like [56645] (2)
    flavoprotein: binds FAD; constituent families differ in the numbers of C-terminal domains (four-helical bundles)
    uperfamily
14. Carbohydrate phosphatase [56654] (1)
  N-terminal domain is an alpha+beta, C-terminal domain is an alpha/beta with mixed beta-sheet
  1. Carbohydrate phosphatase [56655] (2)
    uperfamily
15. DNA/RNA polymerases [56671] (1)
  divided into morphological domains including "palm", "thumb" and "fingers"; the catalytic "palm" domain is conserved to all members
  1. DNA/RNA polymerases [56672] (6)
    "palm" domain has a ferredoxin-like fold, related to that of an adenylyl cyclase domain
    uperfamily
16. beta and beta-prime subunits of DNA dependent RNA-polymerase [64483] (1)
  Multidomain subunits of complex domain organization
  1. beta and beta-prime subunits of DNA dependent RNA-polymerase [64484] (2)
    The catalytic site is formed by the association of two double-psi beta-barrel domains, one from each subunit
    uperfamily
17. Poly(A) polymerase catalytic subunit-like [160956] (1)
  3 domains; d1: all-alpha, contains HhH motif; d2: alpha+beta of nucleotidyltransferase fold (scop_cf 81302); d3: [alpha+beta; beta(3)-alpha-beta(3)-alpha(2); 3 layers: a/b/a; mixed beta-sheet of 6 strands, order 123654, strands 2 and 5 are antiparallel to the rest
  1. Poly(A) polymerase catalytic subunit-like [160957] (1)
    Central domain d2 is distantly related to the nucleotidyltransferase superfamily (scop_sf 81301)
18. Adenylylcyclase toxin (the edema factor) [81299] (1)
  3 domains: (1&2) alpha+beta, with domain 2 being inserted in domain 1; (3) all-alpha
  1. Adenylylcyclase toxin (the edema factor) [81298] (1)
    Domain 1 has topological and active site similarity to the Nucleotidyltransferases (eg. 1kny N-domain); domain 3 binds calmodulin
    uperfamily
19. Prokaryotic type I DNA topoisomerase [56711] (1)
  4 domains: (1) Toprim alpha/beta; (2&4) "winged helix"-like; (3) barrel: n=6, S=8
  1. Prokaryotic type I DNA topoisomerase [56712] (1)
    duplication: the protein chain passing through the domains 2-4 makes two structural repeats
    The active site is formed by the toprim and "winged helix" domains (domains 1 and 4); these two domains are also found in the type II topoisomerase (DNA gyrase A) and in the alpha subunit of topoisomerase IV
    uperfamily
20. Type II DNA topoisomerase [56718] (1)
  4 domains: (1) toprim alpha/beta; (2) "winged helix"-like; (3) alpha+beta; (4) all-alpha
  1. Type II DNA topoisomerase [56719] (1)
    uperfamily
21. DNA topoisomerase IV, alpha subunit [56725] (1)
  2 domains: (1) toprim alpha/beta; (2) "winged helix"-like
  1. DNA topoisomerase IV, alpha subunit [56726] (1)
    uperfamily
22. DNA primase core [56730] (1)
  2 domains: (1) alpha+beta; (2) toprim alpha/beta
  1. DNA primase core [56731] (2)
    uperfamily
23. Recombination protein RecR [111303] (1)
  consists of three domains: alpha-helical dimerisation domain (res. 1-53) with HhH motif; 'treble cleft' C4 zinc-finger domain (54-76); and Toprim domain (76-199; segment-swapped dimer)
  1. Recombination protein RecR [111304] (1)
    uperfamily
24. Eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment [56740] (1)
  2 domains: alpha+beta and all-beta
  1. Eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment [56741] (1)
    uperfamily
25. D-aminoacid aminotransferase-like PLP-dependent enzymes [56751] (1)
  2 domains: (1) alpha+beta: beta3-alpha2-beta2; (2) alpha/beta, a part of its mixed sheet forms barrel: n=6, S=8
  1. D-aminoacid aminotransferase-like PLP-dependent enzymes [56752] (1)
    uperfamily
26. HydB/Nqo4-like [56761] (1)
  3 domains: (1) all-alpha; (2&3) alpha+beta
  1. HydB/Nqo4-like [56762] (2)
    uperfamily
27. HydA/Nqo6-like [56769] (1)
  2 domains: (1) alpa/beta; (2) Fe-S cluster-bound
  1. HydA/Nqo6-like [56770] (2)
    uperfamily
28. Dehydroquinate synthase-like [56795] (1)
  2 domains: (1) alpha/beta of a Rossmann-fold topology, binds NAD (2) multihelical array
  1. Dehydroquinate synthase-like [56796] (2)
    uperfamily
29. Siroheme synthase middle domains-like [75614] (1)
  2 domains: (1) alpha+beta, 2 layers; (2) 3/4-helical bundle, right-handed twist, left-handed superhelix
  1. Siroheme synthase middle domains-like [75615] (1)
    uperfamily
30. Acetyl-CoA synthetase-like [56800] (1)
  4 domains: (1&2) duplication: share the same alpha/beta fold; (3) beta-barrel; (4) alpha+beta
  1. Acetyl-CoA synthetase-like [56801] (1)
    uperfamily
31. Ribosomal protein L1 [56807] (1)
  2 domains: (1) alpha+beta; (2) alpha/beta (interrupts domain 1)
  1. Ribosomal protein L1 [56808] (1)
    uperfamily
32. Release factor [75619] (1)
  4 domains: (1) 3-helical bundle; (2) alpha+beta of ferredoxin-like fold (3 and 4) alpha+beta of dsRDB-like fold
  1. Release factor [75620] (1)
    uperfamily
33. YaeB-like [118195] (1)
  2 domains; d1: [beta-barrel (n=6, S=10), similar to the Reductase/isomerase/elongation factor common domain fold (scop_cf 50412), provides homodimerisation interface]; d2: [alpha+beta (disordered)]
  1. YaeB-like [118196] (1)
    uperfamily
34. MalF N-terminal region-like [160963] (1)
  consists of 3 N-terminal transmembrane helices, an alpha+beta linker domain and a beta-barrel (n=7; S=8) with one overside loop
  1. MalF N-terminal region-like [160964] (1)
35. YebC-like [75624] (1)
  3 domains: (1) 3-helical bundle; (2 and 3 ) alpha+beta of different folds: domain 3 has a ferredoxin-like fold and is inserted in domain 2
  1. YebC-like [75625] (1)
    uperfamily
36. Cullin homology domain [75631] (1)
  3 domains: (1) 4-helical bundle; (2) alpha+beta; (3) "winged helix"-like
  1. Cullin homology domain [75632] (1)
    uperfamily
37. Sec1/munc18-like (SM) proteins [56814] (1)
  3 domains: (1 and 2) alpha+beta; (3) mostly alpha, inserted in domain 2
  1. Sec1/munc18-like (SM) proteins [56815] (1)
    uperfamily
38. Prismane protein-like [56820] (1)
  3 domains: (1) spectrin repeat-like 3-helical bundle; (2 and 3) alpha/beta: Rossmann-fold topology
  1. Prismane protein-like [56821] (3)
    uperfamily
39. Subunits of heterodimeric actin filament capping protein Capz [90095] (1)
  3 domains: (1) protozoan pheromone-like alpha-helical bundle; (2) rubredoxin-like domain lacking metal-binding site; (3) alpha+beta heterodimerisation domain: alpha-beta(5)-alpha
  1. Subunits of heterodimeric actin filament capping protein Capz [90096] (2)
    uperfamily
40. beta-lactamase/transpeptidase-like [56600] (1)
  contains a cluster of helices and an alpha+beta sandwich
  1. beta-lactamase/transpeptidase-like [56601] (3)
    uperfamily
41. Upper collar protein gp10 (connector protein) [56825] (1)
  2 domains: (1) alpha-helical bundle; (2) beta-barrel (n=5, S=8)
  1. Upper collar protein gp10 (connector protein) [56826] (1)
    uperfamily
42. AF1531-like [160974] (1)
  2 domains; d1: incomplete barrel similar to the OB-fold domain of ribosomal L2 protein, d2: six helices, array
  1. AF1531-like [160975] (1)
43. Phase 1 flagellin [64517] (1)
  3 domains: (1) alpha-helical bundle; (2&3) complex all-beta folds
  1. Phase 1 flagellin [64518] (1)
    uperfamily
44. 39 kda initiator binding protein, IBP39, C-terminal domains [103408] (1)
  2 closely associated domains: (1) all-alpha, EF-hand like; (2) alpha+beta, Frataxin-like
  1. 39 kda initiator binding protein, IBP39, C-terminal domains [103409] (1)
    uperfamily
45. AF1104-like [111320] (1)
  2 domains; d1: [all-alpha; 3-helical bundle, similar to the immunoglobulin/albumin-binding domain-like fold (scop_cf 46996)]; d2: [alpha/beta; 3 layers, a/b/a; 6-stranded mixed beta-sheet, order: 321456, strand 6 is antiparallel to the rest]
  1. AF1104-like [111321] (1)
    uperfamily
46. SSO1389-like [160979] (1)
  2 domains; d1: [alpha/beta, central parallel beta-sheet of 6 strands, order 321456, Rossmann-like]; d2: [alpha+beta, cluster of helices and a small 4-stranded beta-sheet]
  1. SSO1389-like [160980] (1)
47. Urocanase [111325] (1)
  3 domains; d1: alpha+beta [alpha(2)-beta(3); mixed sheet: 213]; d2: alpha/beta of the NAD(P)-binding Rossmann-fold superfamily (scop_sf 51735, most similar to scop_fa 51883 and scop_fa 51736); d3: alpha+beta of the glutamine synthetase/guanido kinase fold (scop_cf 55930); d1 and d3 form a single beta-sheet
  1. Urocanase [111326] (1)
    uperfamily
48. NAD kinase/diacylglycerol kinase-like [111330] (1)
  2 domains: d1 [alpha/beta; related to the PFK N-terminal domain (scop_sf 53784)]; d2 [all-beta; atypical beta-sandwich made of 4 structural repeats of beta(3) unit]
  1. NAD kinase/diacylglycerol kinase-like [111331] (2)
    uperfamily
49. QueA-like [111336] (1)
  2 domains; d1 (1-64,174-335) [alpha/beta; 3 layers, a/b/a; mixed beta sheet of 9 strands, order: 219863457; strands 1, 5 and 8 are antiparallel to the rest]; d2 (65-142) [all-beta; barrel, closed (n=6, S=10); greek-key; topologically similar to the split barrel fold (scop_cf 50474)
  1. QueA-like [111337] (1)
    uperfamily
50. CbiD-like [111341] (1)
  2 domains; (1) alpha+beta (res 1-192), a circularly permuted rS5 domain 2-like fold (scop_cf 54210); (2) alpha/beta with parallel beta-sheet of 4 strands, order 2134
  1. CbiD-like [111342] (1)
    uperfamily
51. Rap/Ran-GAP [111346] (1)
  consists of two domains; d1: alpha+beta (78-190; alpha-beta(4)-alpha-beta-alpha; 3 layers; antiparallel beta-sheet of 5 strands; order 51234); d2: alpha/beta similar to the G-domain fold (191-381; scop_fa 52592)
  1. Rap/Ran-GAP [111347] (1)
    uperfamily
52. Vacuolar ATP synthase subunit C [118202] (1)
  2 alpha+beta (sub)domains [each has a ferredoxin-like fold; scop_cf 54861], connected with 3-helical bundle; duplication: two repeats of beta-alpha-beta-[alpha coiled-coil]-beta-alpha-beta motif
  1. Vacuolar ATP synthase subunit C [118203] (1)
    uperfamily
53. Thermophilic metalloprotease-like [144051] (1)
  consists of two domains; d1: alpha/beta (3 layers, a/b/a; parralel beta-sheet, order 2134); d2: pseudo beta-barrel capped by helices
  1. Thermophilic metalloprotease-like [144052] (1)
    uperfamily
54. ImpE-like [144058] (1)
  consists of two domains; d1: right-handed superhelix of five helices; d2: pseudo beta-barrel containing structurally similar part to the "Histone-like" proteins from archaea (scop_fa 54161)
  1. ImpE-like [144059] (1)
    uperfamily
55. CV3147-like [160990] (1)
  2 domains; d1: [alpha/beta; 3 layers, a/b/a, mixed beta-sheet of 8 strands, order 12543876, strands 1, 7 and 8 are antiparallel to the rest]; d2: [pseudo beta-barrel of 6 strands, meander]
  1. CV3147-like [160991] (1)
56. Heme iron utilization protein-like [144063] (1)
  2 domains; d1 - 3-helical bundle similar to the homeodomain-like fold; d2 - 6-stranded beta-barrel capped by two helices at one end, similar topology to the PH-like fold
  1. Heme iron utilization protein-like [144064] (2)
    uperfamily
57. HI0933 insert domain-like [160995] (1)
  2 domains; d1: barrel, closed, n=6, S=12, greek-key; d2: four-helical bundle, inserted in d1
  1. HI0933 insert domain-like [160996] (1)
58. NSP3 homodimer [69902] (1)
  2 domains: (1) all-alpha, (2) alpha+beta; asymmetric homodimer with each domain intertwining with its counterpart
  1. NSP3 homodimer [69903] (1)
    uperfamily
59. E2F-DP heterodimerization region [144073] (1)
  heterodimeric fold with the N-terminal long helices of both chains forming a parallel coiled coil and their C-terminal folded beta-hairpins interlocking together in a beta-sandwich
  1. E2F-DP heterodimerization region [144074] (2)
    uperfamily
60. Membrane penetration protein mu1 [69907] (1)
  4 domains: three intertwined predominately alpha domains and one jelly-roll beta-sandwich
  1. Membrane penetration protein mu1 [69908] (1)
    uperfamily
61. Flu NP-like [161002] (1)
  consists of alpha+beta and all-alpha domains; biological unit is a trimer
  1. flu NP-like [161003] (1)
62. Viral glycoprotein ectodomain-like [161007] (1)
  complex fold; contains three rigid, mostly-beta domains and an alpha-helical region, acting as a conformatiomal switch ("fusion stalk")
  1. Viral glycoprotein ectodomain-like [161008] (2)
63. Reovirus inner layer core protein p3 [56830] (1)
  large protein without apparent domain division; has a number of all-alpha regions and one all beta domain near the C-end
  1. Reovirus inner layer core protein p3 [56831] (2)
    uperfamily
64. L-A virus major coat protein [82855] (1)
  large protein without apparent domain division
  1. L-A virus major coat protein [82856] (1)
    uperfamily
65. Major capsid protein VP5 [103416] (1)
  large protein without apparent domain division
  1. Major capsid protein VP5 [103417] (1)
    uperfamily
66. Viral ssDNA binding protein [118207] (1)
  2 domains; d1: [large alpha+beta domain subdivided into the 'head', 'neck' and 'shoulders' regions; in the 'neck', there is an OB-fold interrupted by large insertions]; d2: [all-alpha, 6 helices; orthogonal array]
  1. Viral ssDNA binding protein [118208] (1)
    uperfamily
Membrane and cell surface proteins and peptides [56835] (58)
Does not include proteins in the immune system
1. Toxins' membrane translocation domains [56836] (5)
  multi-helical domains of various folds which is thought to unfold in the membrane
  1. Colicin [56837] (1)
    uperfamily
  2. Diphtheria toxin, middle domain [56845] (1)
    uperfamily
  3. delta-Endotoxin (insectocide), N-terminal domain [56849] (1)
    uperfamily
  4. Bcl-2 inhibitors of programmed cell death [56854] (1)
    PROVISIONAL CLASSIFICATION, based on structural similarity to the diphtheria toxin domain
    uperfamily
  5. Exotoxin A, middle domain [56864] (1)
    uperfamily
2. Family A G protein-coupled receptor-like [81322] (1)
  core: up-and-down bundle of seven transmembrane helices tilted 20 degrees with respect to the plane of the membrane
  1. Family A G protein-coupled receptor-like [81321] (2)
    uperfamily
3. Single transmembrane helix [81407] (38)
  not a true fold
  1. Photosystem II reaction centre subunit H, transmembrane region [81490] (1)
    uperfamily
  2. Mitochondrial cytochrome c oxidase subunit IV [81406] (1)
    uperfamily
  3. Mitochondrial cytochrome c oxidase subunit VIa [81411] (1)
    uperfamily
  4. Mitochondrial cytochrome c oxidase subunit VIc [81415] (1)
    uperfamily
  5. Mitochondrial cytochrome c oxidase subunit VIIa [81419] (1)
    uperfamily
  6. Mitochondrial cytochrome c oxidase subunit VIIb [81423] (1)
    uperfamily
  7. Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa) [81427] (1)
    uperfamily
  8. Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX) [81431] (1)
    uperfamily
  9. Bacterial aa3 type cytochrome c oxidase subunit IV [81469] (1)
    uperfamily
  10. Bacterial ba3 type cytochrome c oxidase subunit IIa [81473] (1)
    uperfamily
  11. F1F0 ATP synthase subunit B, membrane domain [81573] (1)
    uperfamily
  12. Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor [81496] (1)
    uperfamily
  13. ISP transmembrane anchor [81502] (1)
    uperfamily
  14. Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81508] (1)
    uperfamily
  15. Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81514] (1)
    uperfamily
  16. Subunit XI (6.4 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81518] (1)
    uperfamily
  17. Subunit III of photosystem I reaction centre, PsaF [81536] (1)
    uperfamily
  18. Subunit VIII of photosystem I reaction centre, PsaI [81540] (1)
    uperfamily
  19. Subunit IX of photosystem I reaction centre, PsaJ [81544] (1)
    uperfamily
  20. Subunit XII of photosystem I reaction centre, PsaM [81548] (1)
    uperfamily
  21. Subunit PsaX of photosystem I reaction centre [81552] (1)
    uperfamily
  22. Iron-sulfur subunit of formate dehydrogenase N, transmembrane anchor [81597] (1)
    uperfamily
  23. Cytochrome f subunit of the cytochrome b6f complex, transmembrane anchor [103431] (1)
    uperfamily
  24. PetL subunit of the cytochrome b6f complex [103436] (1)
    uperfamily
  25. PetM subunit of the cytochrome b6f complex [103441] (1)
    uperfamily
  26. PetG subunit of the cytochrome b6f complex [103446] (1)
    uperfamily
  27. PetN subunit of the cytochrome b6f complex [103451] (1)
    uperfamily
  28. Preprotein translocase SecE subunit [103456] (1)
    uperfamily
  29. Sec-beta subunit [103460] (1)
    uperfamily
  30. Oligosaccharyltransferase subunit ost4p [103464] (1)
    uperfamily
  31. Photosystem II reaction center protein L, PsbL [161017] (1)
  32. Photosystem II reaction center protein J, PsbJ [161021] (1)
  33. Photosystem II 10 kDa phosphoprotein PsbH [161025] (1)
  34. Photosystem II reaction center protein T, PsbT [161029] (1)
  35. Photosystem II reaction center protein M, PsbM [161033] (1)
  36. Photosystem II reaction center protein K, PsbK [161037] (1)
  37. Photosystem II reaction center protein I, PsbI [161041] (1)
  38. Cytochrome b559 subunits [161045] (1)
4. Bacterial photosystem II reaction centre, L and M subunits [81484] (1)
  five transmembrane helices forming a sheet-like structure
  1. Bacterial photosystem II reaction centre, L and M subunits [81483] (1)
    uperfamily
5. Cytochrome c oxidase subunit I-like [81443] (1)
  12 transmembrane helices in an approximate threefold rotational symmetric arrangement
  1. Cytochrome c oxidase subunit I-like [81442] (1)
    uperfamily
6. Cytochrome c oxidase subunit III-like [81453] (1)
  core: 7 transmembrane helices organized into two bundles, one formed by the first two helices and the other by the rest
  1. Cytochrome c oxidase subunit III-like [81452] (1)
    uperfamily
7. Transmembrane helix hairpin [81334] (5)
  two antiparallel transmembrane helices
  1. Cytochrome c oxidase subunit II-like, transmembrane region [81464] (1)
    uperfamily
  2. F1F0 ATP synthase subunit C [81333] (1)
    uperfamily
  3. Magnesium transport protein CorA, transmembrane region [144083] (1)
    forms homopentameric channel
    uperfamily
  4. Htr2 transmembrane domain-like [158212] (1)
  5. PsbZ-like [161055] (1)
8. F1F0 ATP synthase subunit A [81337] (1)
  core: up-and-down bundle of four transmembrane helices
  1. F1F0 ATP synthase subunit A [81336] (1)
    uperfamily
9. ATP synthase B chain-like [161059] (1)
  long single helix, part of the stator subcomplex
  1. ATP synthase B chain-like [161060] (1)
10. ATP synthase D chain-like [161064] (1)
  non-globular, mostly helical component of the stator subcomplex
  1. ATP synthase D chain-like [161065] (1)
11. Aquaporin-like [81339] (1)
  core: 8 helices, 2 short helices are surrounded by 6 long transmembrane helices
  1. Aquaporin-like [81338] (1)
    uperfamily
12. Ammonium transporter [111351] (1)
  11 transmembrane helices; duplication: consist of 2 structural repeats of five helices each plus extra C-terminal helix
  1. Ammonium transporter [111352] (1)
    uperfamily
13. MFS general substrate transporter [103472] (1)
  12 transmembrane helices; duplication: the N- and C-terminal halves are structurally similar
  1. MFS general substrate transporter [103473] (2)
    uperfamily
14. SNF-like [161069] (1)
  12 transmembrane helices; duplication: consists of two structurally similar halves
  1. SNF-like [161070] (1)
15. Proton glutamate symport protein [118214] (1)
  multihelical membrane protein; partial structural duplication in the C-terminal region; oligomeric state: trimer
  1. Proton glutamate symport protein [118215] (1)
    uperfamily
16. Clc chloride channel [81341] (1)
  core: 18 transmembrane helices
  1. Clc chloride channel [81340] (1)
    uperfamily
17. Voltage-gated potassium channels [81325] (1)
  oligomeric transmembrane alpha-helical proteins
  1. Voltage-gated potassium channels [81324] (1)
    uperfamily
18. Small-conductance potassium channel [81328] (1)
  oligomeric transmembrane alpha-helical protein
  1. Small-conductance potassium channel [81327] (1)
    uperfamily
19. Gated mechanosensitive channel [81331] (1)
  oligomeric transmembrane alpha-helical protein
  1. Gated mechanosensitive channel [81330] (1)
    uperfamily
20. Neurotransmitter-gated ion-channel transmembrane pore [90111] (1)
  heteropentameric transmembrane alpha-helical protein; 4 transmembrane helices per subunit
  1. Neurotransmitter-gated ion-channel transmembrane pore [90112] (1)
    uperfamily
21. Mechanosensitive channel protein MscS (YggB), transmembrane region [82860] (1)
  oligomeric fold; 3 transmembrane helices per subunit
  1. Mechanosensitive channel protein MscS (YggB), transmembrane region [82861] (1)
    uperfamily
22. Multidrug resistance efflux transporter EmrE [103480] (1)
  oligomeric fold; 3 transmembrane helices per subunit
  1. Multidrug resistance efflux transporter EmrE [103481] (1)
    uperfamily
23. V-type ATP synthase subunit C [103485] (1)
  9 transmembrane helices
  1. V-type ATP synthase subunit C [103486] (1)
    duplication: consists of three similar structural parts
    uperfamily
24. Preprotein translocase SecY subunit [103490] (1)
  10 transmembrane helices forming of a gated channel
  1. Preprotein translocase SecY subunit [103491] (1)
    duplication: consists of two similar structural parts
    uperfamily
25. Photosystem I subunits PsaA/PsaB [81559] (1)
  core:11 transmembrane helices
  1. Photosystem I subunits PsaA/PsaB [81558] (1)
    uperfamily
26. Photosystem I reaction center subunit X, PsaK [81564] (1)
  core: hairpin of two transmembrane helices
  1. Photosystem I reaction center subunit X, PsaK [81563] (1)
    uperfamily
27. Photosystem I reaction center subunit XI, PsaL [81569] (1)
  core: three transmembrane helices, bundle
  1. Photosystem I reaction center subunit XI, PsaL [81568] (1)
    uperfamily
28. ABC transporter involved in vitamin B12 uptake, BtuC [81346] (1)
  multihelical; complex architecture with several transmembrane helices
  1. ABC transporter involved in vitamin B12 uptake, BtuC [81345] (1)
    uperfamily
29. ABC transporter transmembrane region [90122] (1)
  multihelical; complex architecture with several transmembrane helices
  1. ABC transporter transmembrane region [90123] (1)
    uperfamily
30. Multidrug efflux transporter AcrB transmembrane domain [82865] (1)
  12 transmembrane helices; duplication: the N- and C-terminal halves of the whole proteins are structurally similar
  1. Multidrug efflux transporter AcrB transmembrane domain [82866] (1)
    uperfamily
31. a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81649] (1)
  core: three transmembrane helices, up-and-down bundle
  1. a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81648] (1)
    uperfamily
32. Heme-binding four-helical bundle [81344] (3)
  core: four transmembrane helices, up-and-down bundle, binds one or two heme groups in between the helices
  1. Transmembrane di-heme cytochromes [81342] (2)
    Three of the four heme-ligands are conserved between the two families; both heme groups bind similarly but not identically
    uperfamily
  2. Respiratory nitrate reductase 1 gamma chain [103501] (1)
    possible link between the two other superfamilies: this subunit corresponds to the gamma subunit of a functionally related Formate dehydrogenase N complex but is structurally closer to the Fumarate reductase subunit FrdC
    uperfamily
  3. Fumarate reductase respiratory complex transmembrane subunits [81343] (2)
    two distinct families: in one family the common fold is contained in a single-chain subunit, in the other it is formed by two chains
    uperfamily
33. 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81525] (1)
  membrane-associated alpha-helical protein; no transmembrane helices
  1. 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81524] (1)
    location - matrix side of the bc1 complex
    uperfamily
34. Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81532] (1)
  membrane-associated alpha-helical protein; no transmembrane helices
  1. Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81531] (1)
    location - intermembrane side of the bc1 complex
    uperfamily
35. Mitochondrial ATP synthase coupling factor 6 [111356] (1)
  2 helices, hairpin
  1. Mitochondrial ATP synthase coupling factor 6 [111357] (1)
    uperfamily
36. Calcium ATPase, transmembrane domain M [81666] (1)
  core: multihelical; consists of three transmembrane regions of 2, 2 and 6 helices, separated by cytoplasmic domains
  1. Calcium ATPase, transmembrane domain M [81665] (1)
    uperfamily
37. Light-harvesting complex subunits [56917] (1)
  membrane all-alpha fold
  1. Light-harvesting complex subunits [56918] (1)
    uperfamily
38. Photosystem II antenna protein-like [161076] (1)
  6 transmembrane helices arranged in three antiparallel pairs (hairpins), segregated by cofactors; there can be insertions of different small subdomains in different exposed loops
  1. Photosystem II antenna protein-like [161077] (1)
39. Mitochondrial carrier [103505] (1)
  membrane all-alpha fold; 6-helical "barrel" with internal binding cavity
  1. Mitochondrial carrier [103506] (1)
    duplication: consists of three alpha-hairpin repeats
    uperfamily
40. Chlorophyll a-b binding protein [103510] (1)
  membrane all-alpha fold; three transmembrane helices
  1. Chlorophyll a-b binding protein [103511] (1)
    duplication: contains two structural repeats
    uperfamily
41. MAPEG domain-like [161083] (1)
  4 helices, bundle; left-handed superhelix
  1. MAPEG domain-like [161084] (1)
42. MgtE membrane domain-like [161092] (1)
  5 transmembrane helices; bundle, right-handed twist
  1. MgtE membrane domain-like [161093] (1)
    homodimer, swapped with the N-terminal helices
43. MetI-like [161097] (1)
  core: 5 transmembrane helices; flattened bundle
  1. MetI-like [161098] (1)
44. Rhomboid-like [144090] (1)
  6 transmembrane helices
  1. Rhomboid-like [144091] (1)
    uperfamily
45. Cation efflux protein transmembrane domain-like [161110] (1)
  6 transmembrane helices, bundle
  1. Cation efflux protein transmembrane domain-like [161111] (1)
46. Connexin43 [118219] (1)
  mostly unstructured; 2 helices, hairpin
  1. Connexin43 [118220] (1)
    uperfamily
47. Transmembrane beta-barrels [56924] (6)
  not a true fold, gathers together transmembrane barrels of different (n,S)
  1. OMPA-like [56925] (4)
    forms (8,10) barrel
    uperfamily
  2. OMPT-like [69917] (2)
    forms (10,12) barrel
    uperfamily
  3. Autotransporter [103515] (1)
    forms (12,14) barrel; contains a long alpha-helix running along the barrel axis
    uperfamily
  4. Outer membrane phospholipase A (OMPLA) [56931] (1)
    forms (12,16) barrel
    uperfamily
  5. Porins [56935] (4)
    uperfamily
  6. Tsx-like channel [111364] (1)
    forms (12,16) barrel
    uperfamily
48. Outer membrane efflux proteins (OEP) [56953] (1)
  subunit fold contains tandem repeat of alpha-beta hairpin-alpha(2) motif
  trimeric fold contains barrel (n=12, S=18) formed by beta-hairpins, two from each subunit, and a bundle of helices with a channel running through it
  1. Outer membrane efflux proteins (OEP) [56954] (1)
    uperfamily
49. HlyD-like secretion proteins [111368] (1)
  consists of three domains: beta-barrel (res. 29-38,170-259; scop_cf 50412); barrel-sandwich hybrid (39-72,135-169; scop_sf 51230) and long alpha-hairpin (73-134; scop_cf 46556)
  1. HlyD-like secretion proteins [111369] (1)
    uperfamily
50. Leukocidin-like [56958] (1)
  subunit fold contains beta-sandwich of Ig-like (grerk-key) topology and a beta-ribbon arm that forms an oligomeric transmembrane barrel
  1. Leukocidin-like [56959] (2)
    uperfamily
51. Lipovitellin-phosvitin complex; beta-sheet shell regions [56967] (1)
  contains several large open beta-sheets
  1. Lipovitellin-phosvitin complex; beta-sheet shell regions [56968] (1)
    uperfamily
52. Aerolisin/ETX pore-forming domain [56972] (1)
  3 domains: (1) alpha+beta; (2&3) all-beta
  1. Aerolisin/ETX pore-forming domain [56973] (2)
    uperfamily
53. Perfringolysin [56977] (1)
  2 domains: (1) alpha+beta; (2) all-beta, similar to the CalB domain fold but the two last strands are transposed
  1. Perfringolysin [56978] (1)
    uperfamily
54. Viral glycoprotein, central and dimerisation domains [56982] (1)
  2 intertwined domains; all-beta and alpha+beta
  1. Viral glycoprotein, central and dimerisation domains [56983] (1)
    uperfamily
55. VP4 membrane interaction domain [111378] (1)
  2 domains; d1: complexed all-beta fold; d2: coiled-coil (trimeric) helical region
  1. VP4 membrane interaction domain [111379] (1)
    uperfamily
56. Head and neck region of the ectodomain of NDV fusion glycoprotein [69921] (1)
  3 intertwined all-beta domains
  1. Head and neck region of the ectodomain of NDV fusion glycoprotein [69922] (1)
    uperfamily
57. OmpH-like [111383] (1)
  trimer; one subunit consists of an alpha/beta oligomerization subdomain [3-stranded parallel beta-sheet, order 213], and an antiparallel coiled coil
  1. OmpH-like [111384] (1)
    uperfamily
58. Anthrax protective antigen [56987] (1)
  4 domains; I (res. 14-225) and II (226-487) are beta-sandwiches of similar gamma-crystallin like topologies; III (488-594) has a beta-grasp like fold; IV (595-735) has an Ig-like fold
  1. Anthrax protective antigen [56988] (1)
    uperfamily
Small proteins [56992] (90)
Usually dominated by metal ligand, heme, and/or disulfide bridges
1. Insulin-like [56993] (1)
  nearly all-alpha
  can be classified as disulfide-rich
  1. Insulin-like [56994] (1)
    uperfamily
2. Knottins (small inhibitors, toxins, lectins) [57015] (19)
  disulfide-bound fold; contains beta-hairpin with two adjacent disulfides
  1. Plant lectins/antimicrobial peptides [57016] (2)
    uperfamily
  2. Plant inhibitors of proteinases and amylases [57027] (1)
    uperfamily
  3. Cyclotides [57038] (4)
    macrocyclic plant knottins closed with the formation of an Asn-Gly peptide
    uperfamily
  4. Gurmarin-like [57048] (2)
    uperfamily
  5. Agouti-related protein [57055] (1)
    uperfamily
  6. omega toxin-like [57059] (5)
    uperfamily
  7. Scorpion toxin-like [57095] (5)
    uperfamily
  8. Cellulose-binding domain [57180] (1)
    uperfamily
  9. Growth factor receptor domain [57184] (1)
    uperfamily
  10. Colipase-like [57190] (1)
    uperfamily
  11. EGF/Laminin [57196] (7)
    uperfamily
  12. Bromelain inhibitor VI (cysteine protease inhibitor) [57243] (1)
    uperfamily
  13. Bowman-Birk inhibitor, BBI [57247] (1)
    uperfamily
  14. Elafin-like [57256] (1)
    uperfamily
  15. Leech antihemostatic proteins [57262] (2)
    uperfamily
  16. Granulin repeat [57277] (1)
    uperfamily
  17. Satiety factor CART (cocaine and amphetamine regulated transcript) [64546] (1)
    uperfamily
  18. DPY module [90148] (1)
    uperfamily
  19. Bubble protein [103565] (1)
    uperfamily
3. PMP inhibitors [57282] (1)
  disulfide-rich fold; all-beta: 3 antiparallel strands
  1. PMP inhibitors [57283] (1)
    uperfamily
4. Midkine [57287] (1)
  disulfide-rich fold; all-beta: 3 antiparallel strands
  1. Midkine [57288] (2)
    uperfamily
5. TSP-1 type 1 repeat [82894] (1)
  disulfide-rich fold; all-beta: 3 antiparallel strands
  1. TSP-1 type 1 repeat [82895] (1)
    uperfamily
6. Amb V allergen [57295] (1)
  disulfide-rich; alpha+beta: 3 antiparallel strands followed by a short alpha helix
  1. Amb V allergen [57296] (1)
    uperfamily
7. Snake toxin-like [57301] (1)
  disulfide-rich fold: nearly all-beta
  1. Snake toxin-like [57302] (3)
    uperfamily
8. BPTI-like [57361] (1)
  disulfide-rich alpha+beta fold
  1. BPTI-like [57362] (3)
    uperfamily
9. Defensin-like [57391] (1)
  Disulfide-rich fold, nearly all-beta
  1. Defensin-like [57392] (3)
    uperfamily
10. Hairpin loop containing domain-like [57413] (1)
  alpha+beta fold with two crossing loops
  1. Hairpin loop containing domain-like [57414] (3)
    the middle part is structurally similar to some knottins and defensins but differs in the disulfide pattern
    uperfamily
11. Neurotoxin III (ATX III) [57418] (1)
  disulfide-rich fold
  1. Neurotoxin III (ATX III) [57419] (1)
    uperfamily
12. LDL receptor-like module [57423] (1)
  disulfide-rich calcium-binding fold
  1. LDL receptor-like module [57424] (1)
    uperfamily
13. Crambin-like [57428] (1)
  disulfide-rich alpha+beta fold
  1. Crambin-like [57429] (1)
    uperfamily
14. Kringle-like [57439] (1)
  disulfide-rich fold; nearly all-beta
  1. Kringle-like [57440] (2)
    uperfamily
15. Kazal-type serine protease inhibitors [100894] (1)
  1. Kazal-type serine protease inhibitors [100895] (2)
    conserved core consists of a helix and a loop crosslinked with two disulfides
    uperfamily
16. Plant proteinase inhibitors [100896] (1)
  disulfide-rich small alpha+beta fold; topological similarity to the Ovomucoid domain III
  1. Plant proteinase inhibitors [100897] (1)
    uperfamily
17. Trefoil/Plexin domain-like [57491] (3)
  disulfide-rich fold; common core is alpha+beta with two conserved disulfides
  1. Trefoil [57492] (1)
    uperfamily
  2. Plexin repeat [103575] (1)
    uperfamily
  3. Variant surface glycoprotein MITAT 1.2, VSG 221, C-terminal domain [118251] (1)
    alpha-beta(2)-alpha; fragment of a larger dimeric protein
    uperfamily
18. Necrosis inducing protein 1, NIP1 [103579] (1)
  disulfide-rich fold; all-beta; duplication: contains two structural repeats
  1. Necrosis inducing protein 1, NIP1 [103580] (1)
    uperfamily
19. Cystine-knot cytokines [57500] (1)
  disulfide-rich fold; common core is all-beta
  1. Cystine-knot cytokines [57501] (7)
    uperfamily
20. Complement control module/SCR domain [57534] (1)
  disulfide-rich all-beta fold
  1. Complement control module/SCR domain [57535] (1)
    uperfamily
21. Crisp domain-like [57545] (1)
  disulfide-rich all-alpha fold
  1. Crisp domain-like [57546] (2)
    uperfamily
22. Blood coagulation inhibitor (disintegrin) [57551] (1)
  small disulfide-rich
  1. Blood coagulation inhibitor (disintegrin) [57552] (1)
    uperfamily
23. Methylamine dehydrogenase, L chain [57560] (1)
  disulfide-rich; nearly all-beta
  1. Methylamine dehydrogenase, L chain [57561] (1)
    uperfamily
24. Serine protease inhibitors [57566] (1)
  disulfide-rich; nearly all-beta
  1. Serine protease inhibitors [57567] (2)
    uperfamily
25. TB module/8-cys domain [57580] (1)
  disulfide-rich; alpha+beta
  1. TB module/8-cys domain [57581] (1)
    uperfamily
26. TNF receptor-like [57585] (1)
  duplication: consists of three similar disulfide-rich domains
  1. TNF receptor-like [57586] (2)
    uperfamily
27. Heparin-binding domain from vascular endothelial growth factor [57592] (1)
  duplication: consists of two similar disulfide-rich domains, alpha+beta
  1. Heparin-binding domain from vascular endothelial growth factor [57593] (1)
    uperfamily
28. Antifungal protein (AGAFP) [57597] (1)
  disulfide-rich; all-beta: open barrel, 5 strands; OB-fold-like
  1. Antifungal protein (AGAFP) [57598] (1)
    uperfamily
29. FnI-like domain [57602] (1)
  disulfide-rich, all-beta
  1. FnI-like domain [57603] (2)
    uperfamily
30. Thyroglobulin type-1 domain [57609] (1)
  disulfide-rich, alpha+beta
  1. Thyroglobulin type-1 domain [57610] (1)
    uperfamily
31. Type X cellulose binding domain, CBDX [57614] (1)
  disulfide-rich, alpha+beta
  1. Type X cellulose binding domain, CBDX [57615] (1)
    uperfamily
32. Cellulose docking domain, dockering [64570] (1)
  disulfide-rich, alpha+beta
  1. Cellulose docking domain, dockering [64571] (1)
    uperfamily
33. Carboxypeptidase inhibitor [57619] (1)
  disulfide-rich, alpha+beta
  1. Carboxypeptidase inhibitor [57620] (1)
    uperfamily
34. Invertebrate chitin-binding proteins [57624] (1)
  disulfide-rich
  1. Invertebrate chitin-binding proteins [57625] (2)
    shares a putative chitin-binding motif with the plant lectins/antimicrobial peptides superfamily but lacks one of the conserved disulfides of the knottin fold
    uperfamily
35. Pheromone ER-23 [69963] (1)
  disulfide-rich, all-alpha
  1. Pheromone ER-23 [69964] (1)
    uperfamily
36. Mollusk pheromone [90182] (1)
  disulfide-rich; all-alpha
  1. Mollusk pheromone [90183] (1)
    uperfamily
37. Apical membrane antigen 1 [82909] (1)
  disulfide-rich, alpha+beta
  1. Apical membrane antigen 1 [82910] (1)
    uperfamily
38. Somatomedin B domain [90187] (1)
  disulfide-rich
  1. Somatomedin B domain [90188] (1)
    uperfamily
39. Notch domain [90192] (1)
  disulfide-rich; all-alpha; calcium-binding
  1. Notch domain [90193] (1)
    uperfamily
40. Mini-collagen I, C-terminal domain [103588] (1)
  disulfide-rich
  1. Mini-collagen I, C-terminal domain [103589] (1)
    uperfamily
41. Hormone receptor domain [111417] (1)
  disulfide-rich all-beta fold; contains beta sandwich of 5 strands
  1. Hormone receptor domain [111418] (1)
    uperfamily
42. Resistin [111422] (1)
  disulfide-rich six-stranded beta-sandwich; jelly-roll
  1. Resistin [111423] (1)
    uperfamily
43. YAP1 redox domain [111429] (1)
  bipartite cysteine-rich all-alpha domain; a single helix in the N-terminal part (chain A) is linked by disulfides to the C-terminal part (chain B) [3-helical bundle of the RuvA C-terminal domain-like fold (scop_cf 46928)
  1. YAP1 redox domain [111430] (1)
    uperfamily
44. Toxic hairpin [57006] (4)
  disulfide crosslinked alpha-helical hairpin
  1. Heat-stable enterotoxin B [57007] (1)
    uperfamily
  2. Neurotoxin B-IV [57011] (1)
    uperfamily
  3. Pollen allergen ole e 6 [111388] (1)
    contains 3 disulfides
    uperfamily
  4. VhTI-like [161148] (1)
45. Tim10-like [144121] (1)
  alpha-hairpin crosslinked by two disulfides; assembles into a heterohexameric ring-like structure
  1. Tim10-like [144122] (1)
    uperfamily
46. Cysteine zipper [144128] (1)
  string of helices that contain cysteines at almost every turn; folds upon itself and is crosslnked by multiple disulfides
  1. Vanabin-like [144129] (1)
    uperfamily
47. GLA-domain [57629] (1)
  Calcium ion-bound
  1. GLA-domain [57630] (1)
    gamma-carboxy-glutamic acid-rich domain
    uperfamily
48. Cholecystokinin A receptor, N-domain [57641] (1)
  a few helical turns and a disulfide-crosslinked loop
  1. Cholecystokinin A receptor, N-domain [57642] (1)
    uperfamily
49. HIV-1 VPU cytoplasmic domain [57646] (1)
  a few helical turns assembled without a hydrophobic core?
  1. HIV-1 VPU cytoplasmic domain [57647] (1)
    uperfamily
50. HIPIP (high potential iron protein) [57651] (1)
  folds around 4Fe-4S cluster
  1. HIPIP (high potential iron protein) [57652] (1)
    uperfamily
51. Ferredoxin thioredoxin reductase (FTR), catalytic beta chain [57661] (1)
  folds around 4Fe-4S cluster
  1. Ferredoxin thioredoxin reductase (FTR), catalytic beta chain [57662] (1)
    uperfamily
52. beta-beta-alpha zinc fingers [57666] (1)
  simple fold, consisting of the N-terminal beta-hairpin and C-terminal alpha-helical region; each part provides two zinc-coordinating residues with the observed sequences including C2H2, C2HC and CHHC
  1. beta-beta-alpha zinc fingers [57667] (7)
    uperfamily
53. Zn2/Cys6 DNA-binding domain [57700] (1)
  all-alpha dimetal(zinc)-bound fold
  1. Zn2/Cys6 DNA-binding domain [57701] (1)
    duplication: two structural repeats are related by the pseudo dyad
    uperfamily
54. Glucocorticoid receptor-like (DNA-binding domain) [57715] (1)
  alpha+beta metal(zinc)-bound fold
  1. Glucocorticoid receptor-like (DNA-binding domain) [57716] (18)
    uperfamily
55. SBT domain [103611] (1)
  consist of two different zn-binding subdomains, each subdomain resembles a distorted glucocorticoid receptor-like fold
  1. SBT domain [103612] (1)
    uperfamily
56. Retrovirus zinc finger-like domains [57755] (1)
  metal(zinc)-bound fold
  1. Retrovirus zinc finger-like domains [57756] (1)
    uperfamily
57. Rubredoxin-like [57769] (17)
  metal(zinc or iron)-bound fold; sequence contains two CX(n)C motifs, in most cases n = 2
  1. Methionyl-tRNA synthetase (MetRS), Zn-domain [57770] (1)
    uperfamily
  2. Microbial and mitochondrial ADK, insert "zinc finger" domain [57774] (1)
    uperfamily
  3. NADH pyrophosphatase intervening domain [116738] (1)
    uperfamily
  4. Zinc beta-ribbon [57783] (5)
    uperfamily
  5. Casein kinase II beta subunit [57798] (1)
    uperfamily
  6. Rubredoxin-like [57802] (3)
    uperfamily
  7. Zn-finger domain of Sec23/24 [82919] (1)
    uperfamily
  8. Ran binding protein zinc finger-like [90209] (1)
    contains CxxxxC-x(n)-CxxC zinc-binding site; similar to the Sec23/24 zinc finger domain
    uperfamily
  9. Hypothetical protein Ta0289 C-terminal domain [103623] (1)
    contains CxxC-x(n)-CxxxxC zinc-binding site; sequence similarity to NAD-dependent DNA ligase zinc-finger subdomain
    uperfamily
  10. Hypothetical protein MTH1184 [57821] (1)
    contains two CXC motifs
    uperfamily
  11. Aspartate carbamoyltransferase, Regulatory-chain, C-terminal domain [57825] (1)
    uperfamily
  12. Zn-binding ribosomal proteins [57829] (8)
    uperfamily
  13. RNA polymerase subunits [63393] (2)
    uperfamily
  14. NOB1 zinc finger-like [144206] (1)
    uperfamily
  15. Nop10-like SnoRNP [144210] (1)
    uperfamily
  16. CSL zinc finger [144217] (1)
    uperfamily
  17. YfgJ-like [161187] (1)
    duplication: consists of two rubredoxin-like (sub)domains, interlocked together
58. Ribosomal protein L36 [57839] (1)
  zinc-bound beta-ribbon motif
  1. Ribosomal protein L36 [57840] (1)
    uperfamily
59. Zinc-binding domain of translation initiation factor 2 beta [75688] (1)
  zinc-bound beta-ribbon motif
  1. Zinc-binding domain of translation initiation factor 2 beta [75689] (1)
    uperfamily
60. WRKY DNA-binding domain [118289] (1)
  zinc-bound 4-stranded meander beta-sheet, distinct from the beta-ribbon motifs
  1. WRKY DNA-binding domain [118290] (1)
    uperfamily
61. B-box zinc-binding domain [57844] (1)
  zinc-bound alpha+beta motif
  1. B-box zinc-binding domain [57845] (1)
    uperfamily
62. RING/U-box [57849] (1)
  dimetal(zinc)-bound alpha+beta motif; structurally diverse
  1. RING/U-box [57850] (6)
    uperfamily
63. ArfGap/RecO-like zinc finger [57862] (1)
  zinc-bound alpha+beta motif
  1. ArfGap/RecO-like zinc finger [57863] (2)
    uperfamily
64. Metallothionein [57867] (1)
  metal(iron)-bound fold
  duplication: consists of clear structural/sequence repeats
  1. Metallothionein [57868] (1)
    uperfamily
65. Zinc domain conserved in yeast copper-regulated transcription factors [57878] (1)
  metal(zinc)-bound alpha+beta fold
  1. Zinc domain conserved in yeast copper-regulated transcription factors [57879] (1)
    uperfamily
66. Ada DNA repair protein, N-terminal domain (N-Ada 10) [57883] (1)
  metal(zinc)-bound alpha+beta fold
  1. Ada DNA repair protein, N-terminal domain (N-Ada 10) [57884] (1)
    uperfamily
67. Cysteine-rich domain [57888] (1)
  dimetal(zinc)-bound alpha+beta fold
  1. Cysteine-rich domain [57889] (3)
    uperfamily
68. AN1-like Zinc finger [118309] (1)
  dimetal(zinc)-bound alpha+beta fold; partial similarity to the Cysteine-rich domain fold (scop_cf 57888)
  1. AN1-like Zinc finger [118310] (1)
    uperfamily
69. HIT/MYND zinc finger-like [144231] (1)
  dimetal(zinc)-bound alpha+beta fold; structural similarity to members of the Cysteine-rich domain fold (scop_cf 57888)
  1. HIT/MYND zinc finger-like [144232] (2)
    uperfamily
70. CHY zinc finger-like [161218] (1)
  trimetal-bound fold; integration of HIT/MYND-like and rubredoxin-like fingers
  1. CHY zinc finger-like [161219] (1)
71. FYVE/PHD zinc finger [57902] (1)
  dimetal(zinc)-bound alpha+beta fold
  1. FYVE/PHD zinc finger [57903] (3)
    uperfamily
72. Zn-binding domains of ADDBP [57916] (1)
  metal(zinc)-bound alpha+beta fold
  1. Zn-binding domains of ADDBP [57917] (1)
    duplication: contains two Zn-binding domains of similar fold
    uperfamily
73. Inhibitor of apoptosis (IAP) repeat [57923] (1)
  metal(zinc)-bound alpha+beta fold
  1. Inhibitor of apoptosis (IAP) repeat [57924] (1)
    uperfamily
74. CCCH zinc finger [90228] (1)
  metal(zinc)-bound alpha+beta fold
  1. CCCH zinc finger [90229] (1)
    uperfamily
75. E6 C-terminal domain-like [161228] (1)
  alpha+beta zinc-binding fold with topological similarity to the fold of lambda cro protein
  1. E6 C-terminal domain-like [161229] (1)
76. E7 C-terminal domain-like [161233] (1)
  alpha+beta zinc-binding domain; beta(2)-alpha(2)
  1. E7 C-terminal domain-like [161234] (1)
77. Zinc finger domain of DNA polymerase-alpha [90233] (1)
  Zn-binding, all-alpha fold
  1. Zinc finger domain of DNA polymerase-alpha [90234] (1)
    some sequence similarity to the TAZ domain Zn-binding sites
    uperfamily
78. TAZ domain [57932] (1)
  all-alpha fold; Zn-binding sites are in the loops connecting helices
  1. TAZ domain [57933] (1)
    uperfamily
79. T-antigen specific domain-like [161239] (1)
  all-alpha zinc-binding domain; there are two zinc ion-binding sites with a common CxCxxC motif but different fourth ligands
  1. T-antigen specific domain-like [161240] (1)
80. Cysteine-rich DNA binding domain, (DM domain) [82926] (1)
  alpha-helical fold with two Zn-binding sites
  1. Cysteine-rich DNA binding domain, (DM domain) [82927] (1)
    uperfamily
81. Coronavirus NSP10-like [144245] (1)
  binds two zinc ion per subunit; forms a dodecameric shell
  1. Coronavirus NSP10-like [144246] (1)
    uperfamily
82. Zinc hairpin stack [161244] (1)
  stack of beta-hairpins; in the middle hairpins, there is HCxxCxxC motif, the first and the last residues of which contribute to the zinc-binding site on one side of hairpin, whereas the middle residues contribute to the zinc-binding site on the other side
  1. Zinc hairpin stack [161245] (1)
83. DnaJ/Hsp40 cysteine-rich domain [57937] (1)
  metal(zinc)-bound extended beta-hairpin fold
  1. DnaJ/Hsp40 cysteine-rich domain [57938] (1)
    uperfamily
84. HSP33 redox switch-like [118351] (1)
  alpha+beta zinc-binding domain; alpha(2)-beta(2)-alpha
  1. HSP33 redox switch-like [118352] (1)
    uperfamily
85. CCHHC domain [103636] (1)
  metal(zinc)-bound fold
  1. CCHHC domain [103637] (1)
    uperfamily
86. Sec-C motif [103641] (1)
  metal(zinc)-bound fold
  1. Sec-C motif [103642] (1)
    uperfamily
87. Viral leader polypeptide zinc finger [144250] (1)
  consists of small beta-hairpin with CxH motif and short helix with CxxC motif
  1. Viral leader polypeptide zinc finger [144251] (1)
    uperfamily
88. TSP type-3 repeat [103646] (1)
  metal(calcium)-bound fold
  1. TSP type-3 repeat [103647] (1)
    uperfamily
89. Expressed protein At2g23090/F21P24.15 [118358] (1)
  not assigned; partly disordered
  1. Expressed protein At2g23090/F21P24.15 [118359] (1)
    putative zinc-finger protein
    uperfamily
90. Intrinsically disordered proteins [144255] (1)
  not a true fold
  1. TSP9-like [144256] (1)
    uperfamily
Coiled coil proteins [57942] (7)
Not a true class
1. Parallel coiled-coil [57943] (34)
  this is not a true fold; includes oligomers of shorter identical helices
  1. Triple coiled coil domain of C-type lectins [57944] (1)
    uperfamily
  2. Trimerization domain of TRAF [57953] (1)
    uperfamily
  3. Leucine zipper domain [57959] (1)
    uperfamily
  4. Inovirus (filamentous phage) major coat protein [57987] (1)
    uperfamily
  5. Tropomyosin [57997] (1)
    uperfamily
  6. Chicken cartilage matrix protein [58002] (1)
    uperfamily
  7. Assembly domain of cartilage oligomeric matrix protein [58006] (1)
    uperfamily
  8. Fibrinogen coiled-coil and central regions [58010] (1)
    uperfamily
  9. Coiled-coil domain of nucleotide exchange factor GrpE [58014] (1)
    uperfamily
  10. Coiled-coil dimerization domain from cortexillin I [58018] (1)
    uperfamily
  11. XRCC4, C-terminal oligomerization domain [58022] (1)
    uperfamily
  12. Intermediate filament protein, coiled coil region [64593] (1)
    uperfamily
  13. Delta-sleep-inducing peptide immunoreactive peptide [58026] (1)
    uperfamily
  14. Rotavirus nonstructural proteins [58030] (2)
    not a true superfamily
    uperfamily
  15. Multimerization domain of the phosphoprotein from sendai virus [58034] (1)
    uperfamily
  16. SNARE fusion complex [58038] (1)
    tetrameric parallel coiled coil
    uperfamily
  17. Outer membrane lipoprotein [58042] (1)
    uperfamily
  18. Fibritin [58046] (1)
    uperfamily
  19. N-terminal coiled coil domain from apc [58050] (1)
    uperfamily
  20. Tetrabrachion [58054] (1)
    uperfamily
  21. Eea1 homodimerisation domain [69979] (1)
    uperfamily
  22. Mitotic arrest deficient-like 1, Mad1 [75704] (1)
    uperfamily
  23. Dimerization motif of sir4 [90242] (1)
    uperfamily
  24. Head morphogenesis protein gp7 [90246] (1)
    uperfamily
  25. Troponin coil-coiled subunits [90250] (2)
    form heterodimeric coiled coil
    uperfamily
  26. Myosin rod fragments [90257] (1)
    uperfamily
  27. G protein-binding domain [103652] (2)
    uperfamily
  28. Geminin coiled-coil domain [111469] (1)
    uperfamily
  29. Vasodilator-stimulated phosphoprotein, VASP, tetramerisation domain [118370] (1)
    tetrameric parallel coiled coil with a right-handed twist
    uperfamily
  30. MPN010-like [144266] (1)
    segmented trimeric coiled coil
    uperfamily
  31. Eferin C-derminal domain-like [144270] (1)
    uperfamily
  32. Heterotrimerisation domain of extracellular hemoglobin linker subunits [144276] (1)
    uperfamily
  33. Sec2 N-terminal region [144284] (1)
    dimeric coiled coil
    uperfamily
  34. RILP dimerisation region [161256] (1)
2. Tetramerization domain of the Mnt repressor [58058] (1)
  1. Tetramerization domain of the Mnt repressor [58059] (1)
    tetrameric antiparallel bundle with a right-handed twist
    uperfamily
3. Stalk segment of viral fusion proteins [58063] (3)
  core: trimeric coiled coil
  1. Influenza hemagglutinin (stalk) [58064] (1)
    uperfamily
  2. Virus ectodomain [58069] (1)
    uperfamily
  3. Coronavirus S2 glycoprotein [111474] (1)
    uperfamily
4. Antiparallel coiled-coil [58086] (17)
  this is not a true fold; contains at least two very long antiparallel helices
  1. Variant surface glycoprotein (N-terminal domain) [58087] (1)
    uperfamily
  2. Clostridium neurotoxins, "coiled-coil" domain [58091] (1)
    uperfamily
  3. Colicin Ia, N-terminal domain [58096] (1)
    uperfamily
  4. Colicin E3 receptor domain [69985] (1)
    uperfamily
  5. Bacterial hemolysins [58100] (2)
    uperfamily
  6. Methyl-accepting chemotaxis protein (MCP) signaling domain [58104] (1)
    uperfamily
  7. Oligomerization domain of hepatitis delta antigen [58108] (1)
    uperfamily
  8. F1 ATPase inhibitor, IF1, C-terminal domain [64602] (1)
    uperfamily
  9. Chemotaxis phosphatase CheZ [75708] (1)
    dimerizes with the formation of a 4-helical bundle
    uperfamily
  10. Rad50 coiled-coil Zn hook [75712] (1)
    dimerizes via a CxxC motif in the loop, zinc-hook
    uperfamily
  11. C-terminal domain of PLC-beta [69989] (1)
    left-handed antiparallel coiled-coil; dimerizes with the formation of a 4-helical bundle
    uperfamily
  12. Tumor suppressor gene product Apc [82931] (1)
    uperfamily
  13. Proline/betaine transporter ProP, C-terminal cytoplasmic domain [103661] (1)
    uperfamily
  14. Fzo-like conserved region [111479] (1)
    antiparallel coiled-coil in the crystals
    uperfamily
  15. occludin/ELL-like [144292] (1)
    antiparallel hairpin with a kinked second helix; similar to the N-terminal structure of the thermostable carboxypeptidase 1 (scop_pr 82731)
    uperfamily
  16. Gam-like [161266] (1)
    homodimeric fold with a ring-like structure formed by kinked coiled-coil and a beta-ribboon, interrupted by small helical insertions
  17. PspA lactotransferrin-binding region [161270] (1)
    3 helices, the middle one is longer than the two others
5. Apolipoprotein A-I [58112] (1)
  tetrameric antiparallel coiled coil, closed in a circuit
  1. Apolipoprotein A-I [58113] (1)
    uperfamily
6. Apolipoprotein A-II [82935] (1)
  segmented tetrameric parallel coiled coil
  1. Apolipoprotein A-II [82936] (1)
    uperfamily
7. Synuclein [118374] (1)
  1. Synuclein [118375] (1)
    uperfamily
Low resolution protein structures [58117] (26)
Not a true class
1. Ribosome and ribosomal fragments [58118] (1)
  1. Ribosome and ribosomal fragments [58119] (3)
    uperfamily
2. Collagen fibre [144296] (1)
  1. Collagen fibre [144297] (1)
    uperfamily
3. Fatty acid synthase [144301] (1)
  1. Fatty acid synthase [144302] (1)
    uperfamily
4. Helicase [58135] (1)
  1. Helicase [58136] (1)
    uperfamily
5. ATP synthase [58140] (1)
  1. ATP synthase [58141] (1)
    uperfamily
6. Membrane ion ATPase [82940] (1)
  1. Membrane ion ATPase [82941] (1)
    uperfamily
7. Multidrug resistance ABC transporter [64606] (1)
  1. Multidrug resistance ABC transporter [64607] (1)
    uperfamily
8. Electron transport chains [58146] (1)
  1. Electron transport chains [58147] (1)
    uperfamily
9. Photosystems [58155] (1)
  1. Photosystems [58156] (1)
    uperfamily
10. Viruses and virus-receptor complexes [58162] (1)
  1. Viruses and virus-receptor complexes [58163] (1)
    uperfamily
11. Reovirus components [58175] (1)
  1. Reovirus components [58176] (1)
    uperfamily
12. Virus envelope proteins [75718] (1)
  1. Virus envelope proteins [75719] (1)
    uperfamily
13. Bacteriophage HK97 procapsid (prohead II) [64611] (1)
  1. Bacteriophage HK97 procapsid (prohead II) [64612] (1)
    uperfamily
14. Bacteriophage T4 3D cryo-EM reconstruction [103674] (1)
  1. Bacteriophage T4 3D cryo-EM reconstruction [103675] (1)
    uperfamily
15. RNA polymerase [58180] (1)
  1. RNA polymerase [58181] (1)
    uperfamily
16. Blood clotting [58187] (1)
  1. Blood clotting [58188] (1)
    uperfamily
17. Microtubule complexes [58193] (1)
  1. Microtubule complexes [58194] (1)
    uperfamily
18. Muscle protein complexes [64616] (1)
  1. Muscle protein complexes [64617] (1)
    uperfamily
19. Ep-cadherin [103681] (1)
  1. Ep-cadherin [103682] (1)
    uperfamily
20. Transferrin receptor-transferrin complex [103686] (1)
  1. Transferrin receptor-transferrin complex [103687] (1)
    uperfamily
21. Signal recognition particle (SRP) complex [103691] (1)
  1. Signal recognition particle (SRP) complex [103692] (1)
    uperfamily
22. GroE chaperon [69998] (1)
  1. GroE chaperon [69999] (1)
    uperfamily
23. clathrin assemblies [111484] (1)
  1. clathrin assemblies [111485] (1)
    uperfamily
24. anthrax toxin protective antigen-receptor complex [111489] (1)
  1. anthrax toxin protective antigen-receptor complex [111490] (1)
    uperfamily
25. Computational models partly based on experimental data [58198] (1)
  1. Computational models partly based on experimental data [58199] (1)
    uperfamily
26. Proteins of incorrect, partial and unknown sequence [58207] (1)
  1. Proteins of incorrect, partial and unknown sequence [58208] (1)
    uperfamily
Peptides [58231] (121)
Peptides and fragments. Not a true class
1. Membrane ion channel-forming peptide antibiotics containing D-aminoacids [58232] (1)
  1. Membrane ion channel-forming peptide antibiotics containing D-aminoacids [58233] (2)
    uperfamily
2. Lantibiotic peptides [58243] (1)
  peptide antibiotic
  1. Lantibiotic peptides [58244] (3)
    uperfamily
3. Leucocin-like bacteriocin [100898] (1)
  consists of a conserved, disulfide-containing N-terminal region (forming a beta-sheet) and a C-terminal helix
  1. Leucocin-like bacteriocin [100899] (1)
    uperfamily
4. Antimicrobial beta-hairpin [58251] (1)
  contains beta-hairpin crosslinked by disulfide bridge(s)
  1. Antimicrobial beta-hairpin [58252] (8)
    not a true superfamily
    uperfamily
5. Antimicrobial helix [58268] (1)
  antibiotic peptide
  1. Antimicrobial helix [58269] (5)
    not a true superfamily
    uperfamily
6. Macrocyclic bacteriocins [58278] (1)
  macrocyclic antimicrobial peptide; bacteriocin
  1. Macrocyclic bacteriocins [58279] (2)
    uperfamily
7. Peptide hormones [58283] (1)
  contains one alpha-helix
  1. Peptide hormones [58284] (1)
    this is not a true superfamily
    uperfamily
8. Angiotensin [90269] (1)
  1. Angiotensin [90270] (1)
    uperfamily
9. delta toxin-like [58307] (3)
  single alpha helix
  1. delta-Toxin [58308] (1)
    uperfamily
  2. Antimicrobial peptide HP(2-20) [90276] (1)
    uperfamily
  3. Anticancer peptides [118391] (1)
    uperfamily
10. PSP1-like [58312] (1)
  1. PSP1-like [58313] (1)
    uperfamily
11. Arg-rich RNA binding peptides [58321] (7)
  1. 30S ribosomal protein THX [58322] (1)
    uperfamily
  2. HIV-1 REV fragments [58326] (1)
    uperfamily
  3. RSG-1.2 peptide [58330] (1)
    uperfamily
  4. TAT peptides [58334] (1)
    uperfamily
  5. Box B RNA-binding N peptide [58339] (1)
    uperfamily
  6. HTLV-1 peptide [58344] (1)
    uperfamily
  7. Ilarvirus coat protein N-terminal fragment [118396] (1)
    uperfamily
12. DNA-binding domains of HMG-I(Y) [58348] (1)
  1. DNA-binding domains of HMG-I(Y) [58349] (1)
    uperfamily
13. VPR protein fragments [58353] (1)
  1. VPR protein fragments [58354] (1)
    uperfamily
14. Inactivation gate of potassium and sodium channels [58358] (1)
  1. Inactivation gate of potassium and sodium channels [58359] (1)
    uperfamily
15. Coagulation factor VIII, membrane-binding peptide [58368] (1)
  1. Coagulation factor VIII, membrane-binding peptide [58369] (1)
    uperfamily
16. Phosphocholine cytidylyltransferase membrane-binding peptides [58373] (1)
  1. Phosphocholine cytidylyltransferase membrane-binding peptides [58374] (1)
    uperfamily
17. Parathyroid hormone fragments (residues between 1 and 39) [58378] (1)
  1. Parathyroid hormone fragments (residues between 1 and 39) [58379] (1)
    uperfamily
18. Corticotropin releasing hormone [58384] (1)
  1. Corticotropin releasing hormone [58385] (1)
    uperfamily
19. Liposaccharide-binding protein CAP18 (residues 106-137) [58389] (1)
  1. Liposaccharide-binding protein CAP18 (residues 106-137) [58390] (1)
    uperfamily
20. Polymorphic antigen SPAM-H1 (residues 90-127) [58394] (1)
  1. Polymorphic antigen SPAM-H1 (residues 90-127) [58395] (1)
    uperfamily
21. Insect toxins [58399] (1)
  1. Insect toxins [58400] (2)
    uperfamily
22. Tertiapin [58404] (1)
  small disulfide-rich peptide
  1. Tertiapin [58405] (1)
    uperfamily
23. Antifreeze polypeptide HPLC-6 [58409] (1)
  1. Antifreeze polypeptide HPLC-6 [58410] (1)
    uperfamily
24. Troponin I fragments [58414] (1)
  1. Troponin I fragments [58415] (1)
    uperfamily
25. Pilin fragments [58420] (1)
  1. Pilin fragments [58421] (1)
    uperfamily
26. RP71935 [58427] (1)
  1. RP71935 [58428] (1)
    uperfamily
27. Atrial natriuretic peptide [58432] (1)
  1. Atrial natriuretic peptide [58433] (1)
    uperfamily
28. Compstatin [58437] (1)
  1. Compstatin [58438] (1)
    uperfamily
29. Membrane-bound antimicrobial peptides [58442] (1)
  1. Membrane-bound antimicrobial peptides [58443] (1)
    uperfamily
30. Endothelin-like [58449] (1)
  small disulfide-rich
  1. Endothelin-like [58450] (1)
    uperfamily
31. Heat-stable enterotoxin (HSE) [58457] (1)
  1. Heat-stable enterotoxin (HSE) [58458] (1)
    uperfamily
32. Conotoxins [58464] (1)
  disulfide-rich fold
  1. Conotoxins [58465] (7)
    all apart omega class; it is not a true superfamily
    uperfamily
33. Conantokin [58494] (1)
  1. Conantokin [58495] (2)
    gamma-carboxyglutamic acid (GLA)-rich peptide; active conformation may be stabilized by metal ions
    uperfamily
34. Contryphan-R [58502] (1)
  1. Contryphan-R [58503] (1)
    uperfamily
35. Kappa-hefutoxin-like [58507] (2)
  hairpin of two short helices crosslinked with two disulfides
  1. Immunodominant region of protein G of BRSV [58508] (1)
    uperfamily
  2. Potassium channel toxins [75739] (1)
    uperfamily
36. Penaeidin-3a [103726] (1)
  1. Penaeidin-3a [103727] (1)
    uperfamily
37. Bradykinin [58512] (1)
  1. Bradykinin [58513] (1)
    uperfamily
38. Transmembrane helical fragments [58517] (1)
  1. Transmembrane helical fragments [58518] (1)
    uperfamily
39. Topogenic peptides [58555] (4)
  1. Ferredoxin chloroplastic transit peptide [58556] (1)
    uperfamily
  2. Vacuolar targeting peptide from NA-PROPI (residues 29-54) [58560] (1)
    uperfamily
  3. Microcin leader peptide [58564] (1)
    uperfamily
  4. ATP synthase beta chain, mitochondrial prepeptide [103737] (1)
    uperfamily
40. Phospholamban fragments [58568] (1)
  1. Phospholamban fragments [58569] (1)
    uperfamily
41. Influenza hemagglutinin fragments [64631] (1)
  1. Influenza hemagglutinin fragments [64632] (1)
    uperfamily
42. Fragments of bowman-birk inhibitor [58574] (1)
  1. Fragments of bowman-birk inhibitor [58575] (1)
    uperfamily
43. Fragments of apolipoproteins [58579] (1)
  1. Fragments of apolipoproteins [58580] (1)
    uperfamily
44. Transactivation protein TAT [58593] (1)
  1. Transactivation protein TAT [58594] (1)
    uperfamily
45. Proline pipe [58599] (1)
  1. Proline pipe [58600] (1)
    uperfamily
46. Amyloid peptides [58604] (1)
  1. Amyloid peptides [58605] (1)
    uperfamily
47. Gelsolin fragment (residues 150-169) [58609] (1)
  1. Gelsolin fragment (residues 150-169) [58610] (1)
    uperfamily
48. Acetylcholine receptor fragment (residues alpha 67-76) [58614] (1)
  1. Acetylcholine receptor fragment (residues alpha 67-76) [58615] (1)
    uperfamily
49. Thrombomodulin EGF domain fragment (residues 409-426) [58619] (1)
  1. Thrombomodulin EGF domain fragment (residues 409-426) [58620] (1)
    uperfamily
50. C-terminal fragment of thermolysin [63387] (1)
  1. C-terminal fragment of thermolysin [63388] (1)
    uperfamily
51. Capsid protein major homology region peptide analog [58629] (1)
  1. Capsid protein major homology region peptide analog [58630] (1)
    uperfamily
52. CD4 and CD8 receptor regions [58635] (1)
  1. CD4 and CD8 receptor regions [58636] (1)
    uperfamily
53. Proto-oncogene tyrosine-protein kinase lck CD4/CD8 interacting region [103748] (1)
  1. Proto-oncogene tyrosine-protein kinase lck CD4/CD8 interacting region [103749] (1)
    uperfamily
54. Heparin binding site of non collagenous domain I (nc1) of collagen facit xiv [58640] (1)
  1. Heparin binding site of non collagenous domain I (nc1) of collagen facit xiv [58641] (1)
    uperfamily
55. GroES fragments [58645] (1)
  1. GroES fragments [58646] (1)
    uperfamily
56. cAMP and cGMP phosphodiesterase (PDE) fragments [58650] (1)
  1. cAMP and cGMP phosphodiesterase (PDE) fragments [58651] (1)
    uperfamily
57. HIV-1 Nef protein fragments [58657] (1)
  1. HIV-1 Nef protein fragments [58658] (1)
    uperfamily
58. HIV-1 envelope gp120 protein fragments [58662] (1)
  1. HIV-1 envelope gp120 protein fragments [58663] (1)
    uperfamily
59. HIV-1 gp41 fragments [70010] (1)
  1. HIV-1 gp41 fragments [70011] (1)
    uperfamily
60. Hepatitis C virus N-terminal capsid protein fragment 2-45 [58667] (1)
  1. Hepatitis C virus N-terminal capsid protein fragment 2-45 [58668] (1)
    uperfamily
61. P27(KIP1) fragment 22-106 [58672] (1)
  1. P27(KIP1) fragment 22-106 [58673] (1)
    uperfamily
62. Transducin alpha-1 subunit rhodopsin binding domain (res. 340-350) [58677] (1)
  1. Transducin alpha-1 subunit rhodopsin binding domain (res. 340-350) [58678] (1)
    uperfamily
63. Transducin gamma-t1 subunit rhodopsin bound fragment (res. 60-71) [90290] (1)
  1. Transducin gamma-t1 subunit rhodopsin bound fragment (res. 60-71) [90291] (1)
    uperfamily
64. alpha-lactalbumin peptide model [58682] (1)
  1. alpha-lactalbumin peptide model [58683] (1)
    uperfamily
65. Coat protein-binding domain of bacteriophage P22 scaffolding protein [58687] (1)
  1. Coat protein-binding domain of bacteriophage P22 scaffolding protein [58688] (1)
    uperfamily
66. Immunoreceptor tyrosine kinase activation motif, ITAM [58692] (1)
  1. Immunoreceptor tyrosine kinase activation motif, ITAM [58693] (1)
    uperfamily
67. Integrin fragments [58697] (1)
  1. Integrin fragments [58698] (1)
    uperfamily
68. Human glutathione reductase (HGR) inhibitor [58702] (1)
  1. Human glutathione reductase (HGR) inhibitor [58703] (1)
    uperfamily
69. Small subunit C-terminal inhibitory peptide of ribonucleotide reductase [58707] (1)
  1. Small subunit C-terminal inhibitory peptide of ribonucleotide reductase [58708] (1)
    uperfamily
70. Histone H3 C-terminal fragment 130-135 [58712] (1)
  1. Histone H3 C-terminal fragment 130-135 [58713] (1)
    uperfamily
71. Smad-binding domain of Sara [58717] (1)
  1. Smad-binding domain of Sara [58718] (1)
    uperfamily
72. Transactivation domain [81275] (1)
  1. Transactivation domain [74800] (1)
    uperfamily
73. Nuclear receptor coactivator Src-1 [100901] (1)
  1. Nuclear receptor coactivator Src-1 [48682] (1)
    uperfamily
74. TBP-binding domain of the transcription factor IIIb Brf1 subunit [90297] (1)
  1. TBP-binding domain of the transcription factor IIIb Brf1 subunit [90298] (1)
    uperfamily
75. BRCA2 BRC4 repeat [82985] (1)
  1. BRCA2 BRC4 repeat [82986] (1)
    uperfamily
76. Peptide derived from p-21 activated kinase [58722] (1)
  1. Peptide derived from p-21 activated kinase [58723] (1)
    uperfamily
77. pak1 autoregulatory domain [58728] (1)
  1. pak1 autoregulatory domain [58729] (1)
    uperfamily
78. Translocated intimin receptor (tir) intimin-binding domain [58733] (1)
  1. Translocated intimin receptor (tir) intimin-binding domain [58734] (1)
    uperfamily
79. Fragments of the L-type calcium channel alpha subunit Cav.1 (dihydropyridine receptor) [58738] (1)
  1. Fragments of the L-type calcium channel alpha subunit Cav.1 (dihydropyridine receptor) [58739] (1)
    uperfamily
80. Tumor suppressor p53 fragments [58743] (1)
  1. Tumor suppressor p53 fragments [58744] (1)
    uperfamily
81. FxFG nucleoporin repeats [58748] (1)
  1. FxFG nucleoporin repeats [58749] (1)
    uperfamily
82. beta-Catenine bound non-globular protein regions [58753] (1)
  1. beta-Catenine bound non-globular protein regions [58754] (1)
    uperfamily
83. Synaptobrevin-II fragments [58758] (1)
  1. Synaptobrevin-II fragments [58759] (1)
    uperfamily
84. VMIP-II fragment [58763] (1)
  1. VMIP-II fragment [58764] (1)
    uperfamily
85. Papillomavirus e6-interacting peptide of e6ap [58768] (1)
  1. Papillomavirus e6-interacting peptide of e6ap [58769] (1)
    uperfamily
86. Isolated insulin B-chain [58773] (1)
  1. Isolated insulin B-chain [58774] (1)
    uperfamily
87. N-terminal hairpin of ubiquitin (residues 1-17) [58778] (1)
  1. N-terminal hairpin of ubiquitin (residues 1-17) [58779] (1)
    uperfamily
88. alpha-helical hairpin of p8mtcp1 [58783] (1)
  1. alpha-helical hairpin of p8mtcp1 [58784] (1)
    uperfamily
89. Syndecan-4 cytoplasmic domain [64638] (1)
  1. Syndecan-4 cytoplasmic domain [64639] (1)
    uperfamily
90. Actin-binding peptides [70017] (1)
  1. Actin-binding peptides [70018] (1)
    uperfamily
91. Pituitary adenylate cyclase activating polypeptide, pacap21 [64643] (1)
  1. Pituitary adenylate cyclase activating polypeptide, pacap21 [64644] (1)
    uperfamily
92. Rack1 interaction site of the CAMP-specific phosphodiesterase pde4d5. [70022] (1)
  1. Rack1 interaction site of the CAMP-specific phosphodiesterase pde4d5. [70023] (1)
    uperfamily
93. Prepeptide of 5-ALAS [70027] (1)
  1. Prepeptide of 5-ALAS [70028] (1)
    uperfamily
94. Cholecystokinin receptor fragments [64648] (1)
  1. Cholecystokinin receptor fragments [64649] (1)
    uperfamily
95. the cytoplasmic N-terminus of the bk beta-subunit kcnmb2 [70032] (1)
  1. the cytoplasmic N-terminus of the bk beta-subunit kcnmb2 [70033] (1)
    uperfamily
96. Trypsin inhibitor SFTIf-1 [64653] (1)
  1. Trypsin inhibitor SFTIf-1 [64654] (1)
    uperfamily
97. Prion protein fragments [70037] (1)
  1. Prion protein fragments [70038] (1)
    uperfamily
98. Tumor suppressor protein p19-ARF fragment [70042] (1)
  1. Tumor suppressor protein p19-ARF fragment [70043] (1)
    uperfamily
99. Antennapedia homeodomain fragments [70047] (1)
  1. Antennapedia homeodomain fragments [70048] (1)
    uperfamily
100. Sheep myeloid antimicrobial peptide SMAP29 based peptides [75751] (1)
  1. Sheep myeloid antimicrobial peptide SMAP29 based peptides [75752] (1)
    uperfamily
101. alpha-2a adrenergic receptor pepride t3-i2 [75756] (1)
  1. alpha-2a adrenergic receptor pepride t3-i2 [75757] (1)
    uperfamily
102. Catestatin fragment from chromogranin A [75761] (1)
  1. Catestatin fragment from chromogranin A [75762] (1)
    uperfamily
103. Bhpbr3, the Baff-binding loop of br3 embedded in a beta-hairpin peptide [82992] (1)
  1. Bhpbr3, the Baff-binding loop of br3 embedded in a beta-hairpin peptide [82993] (1)
    uperfamily
104. N-terminal fragment of gastric H/K-ATPase [82997] (1)
  1. N-terminal fragment of gastric H/K-ATPase [82998] (1)
    uperfamily
105. Barstar fragment [83002] (1)
  1. Barstar fragment [83003] (1)
    uperfamily
106. Cannabinoid receptor 1 (CB1) fragment [83007] (1)
  1. Cannabinoid receptor 1 (CB1) fragment [83008] (1)
    uperfamily
107. Ribosomal protein L10 [64658] (1)
  1. Ribosomal protein L10 [64659] (1)
    uperfamily
108. Ubiquitin interacting motif (UIM) [90302] (1)
  1. Ubiquitin interacting motif (UIM) [90303] (1)
    uperfamily
109. Metal-binding peptide from MerP [103758] (1)
  1. Metal-binding peptide from MerP [103759] (1)
    uperfamily
110. Marinostatin, MstI [103763] (1)
  1. Marinostatin, MstI [103764] (1)
    uperfamily
111. Cross-reactive peptides from 60S acidic ribosomal protein p2 [103768] (1)
  1. Cross-reactive peptides from 60S acidic ribosomal protein p2 [103769] (1)
    uperfamily
112. NTR, cyclotide processing element [111516] (1)
  1. NTR, cyclotide processing element [111517] (1)
    uperfamily
113. HMG-box transcription factor 1 fragments [111523] (1)
  1. HMG-box transcription factor 1 fragments [111524] (1)
    uperfamily
114. MAD protein fragments [111528] (1)
  1. MAD protein fragments [111529] (1)
    uperfamily
115. Fragments of TNF receptors [111533] (1)
  1. Fragments of TNF receptors [111534] (1)
    uperfamily
116. Ezrin-radixin-moesin binding phosphoprotein 50 (ebp50) fragments [111538] (1)
  1. Ezrin-radixin-moesin binding phosphoprotein 50 (ebp50) fragments [111539] (1)
    uperfamily
117. Ribosomal protein L34p [144320] (1)
  non-globular, mainly alpha-helical
  1. Ribosomal protein L34p [144321] (1)
    uperfamily
118. Ribosomal protein S21p [161307] (1)
  non-globular, mainly alpha-helical
  1. Ribosomal protein S21p [161308] (1)
119. Retinoblastoma-associated protein RB1 fragments [144325] (1)
  1. Retinoblastoma-associated protein RB1 fragments [144326] (1)
    uperfamily
120. Genome linked protein vpg [144330] (1)
  1. Genome linked protein vpg [144331] (1)
    uperfamily
121. Programmed cell death protein 5 fragments [144335] (1)
  1. Programmed cell death protein 5 fragments [144336] (1)
    uperfamily
Designed proteins [58788] (44)
Experimental structures of proteins with essentially non-natural sequences. Not a true class
1. New fold designs [103774] (1)
  1. New fold designs [103775] (1)
    uperfamily
2. In vitro evolution products [103779] (1)
  1. In vitro evolution products [103780] (1)
    uperfamily
3. Hybrid and chimeric proteins [58789] (1)
  1. Hybrid and chimeric proteins [58790] (1)
    uperfamily
4. Amphiphilic (amphipathic) alpha helix [58798] (1)
  1. Amphiphilic (amphipathic) alpha helix [58799] (1)
    uperfamily
5. Collagen-like peptides [58805] (1)
  1. Collagen-like peptides [58806] (1)
    uperfamily
6. Coiled serine [58812] (1)
  1. Coiled serine [58813] (1)
    uperfamily
7. Designed trimeric coiled-coil [100903] (1)
  1. Designed trimeric coiled-coil [100904] (1)
    uperfamily
8. Designed heterodimeric coiled-coil [58822] (1)
  1. Designed heterodimeric coiled-coil [58823] (1)
    uperfamily
9. Thermostable heterotrimeric coiled coil [58827] (1)
  1. Thermostable heterotrimeric coiled coil [58828] (1)
    uperfamily
10. Designed four-helix bundle protein [58832] (1)
  1. Designed four-helix bundle protein [58833] (1)
    uperfamily
11. Designed single chain three-helix bundle [58839] (1)
  not a true fold: both possible topologies are created
  1. Designed single chain three-helix bundle [58840] (1)
    uperfamily
12. Peptide f (amphiphilic octadecapeptide) [58846] (1)
  1. Peptide f (amphiphilic octadecapeptide) [58847] (1)
    uperfamily
13. Retro-GCN4 leucine zipper [58851] (1)
  1. Retro-GCN4 leucine zipper [58852] (1)
    uperfamily
14. Glytm1bzip [70053] (1)
  1. Glytm1bzip [70054] (1)
    uperfamily
15. Zinc finger design [58856] (1)
  1. Zinc finger design [58857] (1)
    uperfamily
16. Protein A Ig(Fc)-binding domain mimics [58863] (1)
  1. Protein A Ig(Fc)-binding domain mimics [58864] (1)
    uperfamily
17. Zinc finger based beta-beta-alpha motif [58868] (1)
  1. Zinc finger based beta-beta-alpha motif [58869] (1)
    uperfamily
18. helix-turn-helix motif [58877] (1)
  1. helix-turn-helix motif [58878] (1)
    uperfamily
19. alpha2d [58882] (1)
  1. alpha2d [58883] (1)
    uperfamily
20. Right-handed coiled coil [58887] (1)
  1. Right-handed coiled coil [58888] (1)
    uperfamily
21. TPR domain-based design [90307] (1)
  1. TPR domain-based design [90308] (1)
    uperfamily
22. Erythropoietin (EPO) mimetic peptides [58892] (1)
  1. Erythropoietin (EPO) mimetic peptides [58893] (1)
    uperfamily
23. IL-1 receptor type 1 antagonist peptide AF10847 [58897] (1)
  1. IL-1 receptor type 1 antagonist peptide AF10847 [58898] (1)
    uperfamily
24. Octreotide (Sandostatine), a somatostatine analogue [58902] (1)
  1. Octreotide (Sandostatine), a somatostatine analogue [58903] (1)
    uperfamily
25. Calmodulin [58907] (1)
  1. Calmodulin [58908] (1)
    uperfamily
26. WW domain-based designs [58912] (1)
  1. WW domain-based designs [58913] (1)
    uperfamily
27. Artificial ankyrin repeat proteins [83017] (1)
  1. Artificial ankyrin repeat proteins [83018] (1)
    uperfamily
28. Carboxypeptidase A prodomain-based design [103789] (1)
  1. Carboxypeptidase A prodomain-based design [103790] (1)
    uperfamily
29. Ubiquitin [144344] (1)
  1. Ubiquitin [144345] (1)
    uperfamily
30. Cro lambda fold design [144349] (1)
  1. Cro lambda fold design [144350] (1)
    uperfamily
31. Scorpion toxin-based designs [58917] (1)
  1. Scorpion toxin-based designs [58918] (2)
    uperfamily
32. TH (toxin hand)-motif beta-sheet mini-protein designs [64673] (1)
  1. TH (toxin hand)-motif beta-sheet mini-protein designs [64674] (1)
    uperfamily
33. Inhibitor of mammalian ribonucleotide reductase [58925] (1)
  1. Inhibitor of mammalian ribonucleotide reductase [58926] (1)
    uperfamily
34. Integrin-binding RGD peptide [64682] (1)
  1. Integrin-binding RGD peptide [64683] (1)
    uperfamily
35. Peptide antagonists of IGF-1 [64687] (1)
  1. Peptide antagonists of IGF-1 [64688] (1)
    uperfamily
36. beta-hairpin design [64692] (1)
  1. beta-hairpin design [64693] (1)
    uperfamily
37. Trp-cage miniprotein [75769] (1)
  1. Trp-cage miniprotein [75770] (1)
    uperfamily
38. Synthetic high affinity IgE receptor antagonists [64703] (1)
  1. Synthetic high affinity IgE receptor antagonists [64704] (2)
    not a true superfamily
    uperfamily
39. IFN mimetic syr6 [75779] (1)
  1. IFN mimetic syr6 [75780] (1)
    uperfamily
40. TAZ (CH) Zn-binding domain based design [75784] (1)
  1. TAZ (CH) Zn-binding domain based design [75785] (1)
    uperfamily
41. Beta-sheet designs [75789] (1)
  1. Beta-sheet designs [75790] (1)
    uperfamily
42. PW2, a tryptophan-rich anticocidial peptide [75796] (1)
  1. PW2, a tryptophan-rich anticocidial peptide [75797] (1)
    uperfamily
43. Designed EF-hand type cation-binding loop [111554] (1)
  1. Designed EF-hand type cation-binding loop [111555] (1)
    uperfamily
44. Metalloporphyrin-binding designed peptides [90314] (1)
  1. Metalloporphyrin-binding designed peptides [90315] (1)
    uperfamily