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
EF Hand-like [47472] (4) core: 4 helices; array of 2 hairpins, opened
SWIB/MDM2 domain [47591] (1) core: 4 helices: open bundle; capped by two small 3-stranded beta-sheets duplication: consists of two structural repeats
Pre-protein crosslinking domain of SecA [81766] (1) core: 4 helices: bundle; flanked by two short beta-hairpins duplication: consists of two structural repeats
Ribbon-helix-helix [47597] (1) core: 4 helices; array of 2 hairpins, opened
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
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)
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)
SP0561-like [140682] (1) 5 helices; array; includes extra N-terminal and C-terminal short strands forming parrallel beta-sheet ladder
RbcX-like [158614] (1) 5 helices per subunit; irregular array of short and long helices; swapping of the C-terminal helices in the dimer
YheA-like [158621] (1) 5 helices; "kinked" antiparallel coiled coil; forms flexible oligomeric assemblies via two different dimerisation interfaces
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)
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
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
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
NusB-like [48012] (1) 6 helices: bundle; one central helix is surrounded by 5 others
YutG-like [101306] (1) core: 6 helices; bundle; one central helix is surrounded by 5 others
Rv1873-like [140735] (1) multihelical; contains unusually short buried central helix
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
TerB-like [158681] (1) multihelical; contains two central helices; duplication: there are two three-helical repeats related by pseudo twofold symmetry
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
SopE-like GEF domain [81831] (1) multihelical; consists of two all-alpha subdomains each containing a 3-helical bundle with right-handed twist
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
YgfB-like [101326] (1) multihelical; consists of two tightly associated 3-helical bundles with different twists
PG0816-like [140752] (1) multihelical; comprises two helical bundles, both are topologically similar to the RuvA C-terminal domain-like fold (scop_cf 46928)
UraD-like [158693] (1) multihelical; irregular array of long and short helices
Ribosomal protein L19 (L19e) [48139] (1) multihelical; consists of two different 3-helical domains connected by a long, partly helical linker
PSPTO4464-like [158709] (1) multihelical; consists of two subdomains at the ends of a long connecting helix
GatB/YqeY motif [89094] (1) multihelical; consists of two different alpha-helical bundles (4-helical and 3-helical)
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
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
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
Citrate synthase [48255] (1) multihelical; consists of two all-alpha domains
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
BRCA2 helical domain [81871] (1) multihelical; contains a 3-helical bundle surrounded by several shorter helices
BRCA2 tower domain [81877] (1) multihelical; contains a 3-helical Hin recombinase-like subdomain and two long dimerisation helices
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
PriB N-terminal domain-like [140913] (1) multihelical bundle; contains buried central helix; also includes the PriA interface-forming insert subdomain (alpha+beta)
VPS9 domain [109992] (1) multihelical; consist of two subdomains
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)
Tex N-terminal region-like [158831] (1) multihelical; irregular array of long and short helices; can be divided into several subdomains
AGR_C_984p-like [158836] (1) multihelical, consists of two subdomains; duplication: there are two 5-helical structural repeats, one in each subdomain
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
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)
L21p-like [141090] (1) core: sandwich, 6 strands in 2 sheets
Cupredoxin-like [49502] (2) sandwich; 7 strands in 2 sheets, greek-key variations: some members have additional 1-2 strands
Ctag/Cox11 [110110] (1) sandwich; 7 strands in 2 sheets, greek-key; permutation of the immunoglobulin-like fold
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
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
gamma-Crystallin-like [49694] (1) sandwich; 8 strands in 2 sheets; greek-key duplication: has internal pseudo twofold symmetry
EV matrix protein [50011] (1) consists of two beta-sandwich domains of similar topologies
Viral chemokine binding protein m3 [82045] (1) consists of two different beta-sandwich domains of partial topological similarity to immunoglobulin-like folds
gp9 [50016] (1) consists of two different beta-sandwich domains unrelated to other beta-sandwich folds
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]
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)
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
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
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
Phage tail proteins [69278] (1) core: barrel; n=6, S=10; greek-key; topologically similar to the FMN-binding split barrel
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
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)
AOC barrel-like [141492] (2) barrel, closed; n=8, S=10; meander; mirrored (reversed) topology to the Spreptavidin-like and Lipocalin-like folds
AttH-like [159244] (1) duplication: two flattened beta-barrels of lipocalin-like topology are orthogonally packed with a pseudo twofold symmetry
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
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)
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)
open-sided beta-meander [51086] (2) single sheet formed by beta-hairpin repeats; exposed on both sides in the middle
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
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
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
Triple-stranded beta-helix [69348] (1) (homo)trimer; each chain donates 3 beta-strands per turn of the helix
Triple beta-spiral [51224] (1) trimer formed by the interlocking beta-hairpin repeat units
Trimeric adhesin [101998] (1) trimer; contains two different beta-prism-like domains connected by an linker subdomain of less regular structure
beta-hairpin stack [69359] (1) Trp-rich beta-hairpin repeat units form helical structures of 3 units per turn
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
MAL13P1.257-like [141677] (1) complex fold; duplication: consists of two intertwinned structural repeats related by pseudo dyad
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)
PUA domain-like [88696] (1) pseudobarrel; mixed folded sheet of 5 strands; order 13452; strand 1 and 3 are parallel to each other
AXH domain [102030] (1) pseudobarrel; some similarity to OB-fold
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)
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)
MFPT repeat-like [141738] (1) consists of two similar pseudo barrel subdomains with structural similarity to a circularly permuted SAND domain (scop_fa 63764)
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
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
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
Nucleotide-binding domain [51970] (1) 3 layers: a/b/a; parallel beta-sheet of 5 strands, order 32145; Rossmann-like
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
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
PFL-like glycyl radical enzymes [51997] (1) contains: barrel, closed; n=10, S=10; accommodates a hairpin loop inside the barrel
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
Barstar-like [52037] (2) 2 layers, a/b; parallel beta-sheet of 3 strands, order 123
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.
DsrEFH-like [75168] (1) 3 layers: a/b/a, core: parallel beta-sheet of 5 strands, order 43215
PIN domain-like [88722] (1) 3 layers, a/b/a; core: parallel beta-sheet of 5 strands, order 32145
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
RbsD-like [102545] (1) 3 layers: a/b/a; mixed beta-sheet of 6 strands, order 251634; strand 6 is antiparallel to the rest
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
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
Formyltransferase [53327] (1) 3 layers: a/b/a; mixed beta-sheet of 7 strands, order 3214567; strand 6 is antiparallel to the rest
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
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
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)
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
SIS domain [53696] (1) 3 layers: a/b/a; parallel beta-sheet of 5 strands, order 21345
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
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
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
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
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
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
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
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
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
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
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
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
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
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]
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
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
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
PEP carboxykinase N-terminal domain [68922] (1) contains mixed beta-sheets; topology is partly similar to that of the catalytic C-terminal domain
Chelatase-like [53799] (3) duplication: tandem repeat of two domains; 3 layers (a/b/a); parallel beta-sheet of 4 strands, order 2134
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
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
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
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
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
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
Fe-only hydrogenase [53919] (1) consist of two intertwined domains; contains partial duplication
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
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
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
Lysozyme-like [53954] (1) common alpha+beta motif for the active site region
Cysteine proteinases [54000] (1) consists of one alpha-helix and 4 strands of antiparallel beta-sheet and contains the catalytic triad Cys-His-Asn
His-Me finger endonucleases [54059] (1) core: (alpha)-beta-omega_loop-beta-alpha; embeded in larger different structures
RNase A-like [54075] (1) contains long curved beta-sheet and 3 helices
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)
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
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
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
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
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
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
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
WWE domain [117838] (1) beta(2)-alpha-beta(4); antiparallel folded beta-sheet (half-barrel), order 216543
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
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)
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
AF0104/ALDC/Ptd012-like [117855] (1) duplication: consists of two similar beta-alpha-beta(4) motifs
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
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
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;
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
FYSH domain [89894] (1) beta(2)-alpha(2)-beta(2)-alpha-beta; two layers: alpha/beta; antiparallel sheet: order 51234
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
Coproporphyrinogen III oxidase [102885] (1) alpha-beta(6)-alpha(2)-beta-alpha(n); 3 layers alpha/beta/alpha; antiparallel sheet: order 1234567
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
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
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
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
PX domain [64267] (1) beta(3)-alpha(4); meander beta-sheet packed against array of helices; contains Pro-rich stretch
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
Ferredoxin-like [54861] (59) alpha+beta sandwich with antiparallel beta-sheet; (beta-alpha-beta)x2
PurS-like [109622] (1) consists of two alpha+beta subdomains with some similarity to the ferredoxin-like fold
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)
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)
Pseudouridine synthase [100877] (1) consists of two alpha+beta subdomains with some similarity to the ferredoxin-like fold
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
Folate-binding domain [103024] (1) duplication: consists of two beta(2)-alpha-beta(3)-alpha subdomains swapped with the first strands
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
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
NosL/MerB-like [160386] (1) unusual fold; comprises two structural repeats of beta(2)-alpha-beta motifs, forming separate beta-sheets; probable duplication
Ribosomal protein L30p/L7e [55128] (1) core: beta-alpha-beta-alpha-beta; antiparallel beta-sheet: order 312; some similarity to the ferredoxin-like fold
Chorismate lyase-like [64287] (1) duplication of alpha(2)-beta(3) motif; antiparallel beta sheet, order 123654
YdfO-like [160418] (1) duplication: two alpha(2)-beta(3) motifs are related by pseudo twofold symmetry; single antiparrallel beta-sheet, order:321456
CheC-like [103038] (1) duplication: tandem repeat of two intertwined alpha-beta-(X)-beta(2) motifs
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
Pepsin inhibitor-3 [55148] (1) duplication of beta(3)-alpha(2) motif: meander beta sheets form barrel-like structure
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
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
IF3-like [55199] (8) beta-alpha-beta-alpha-beta(2); 2 layers; mixed sheet 1243, strand 4 is antiparallel to the rest
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)
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
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)
NMB0513-like [160471] (1) alpha(3)-beta(2)-alpha-beta(2); some similarity to the "winged helix" DNA-binding domain fold
PA1123-like [160476] (1) irregular array of short helices and two three-stranded beta-sheets
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
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
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
Tautomerase/MIF [55330] (1) (beta-alpha-beta)2; 2 layers: alpha/beta; mixed beta-sheet generally forms trimers with three closely packed beta-sheets
FwdE/GAPDH domain-like [55346] (4) core: alpha-beta-alpha-beta(3); mixed sheet: 2134, strand 2 is parallel to strand 1
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)
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)
Major capsid protein gp5 [56562] (1) unusual fold; contains PF0899-like core, decorated with additional structure
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
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
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
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
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
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
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
Cell cycle regulatory proteins [55636] (1) beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1243 can form strand-exchange dimers
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
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
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)
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)
YqaI-like [160712] (1) dimeric zinc-less 'zinc finger'-like fold; similar to the C-terminal strand-swapped B-box domain (scop_cf 57844)
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
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
S-adenosylmethionine synthetase [55972] (1) duplication: consists of 3 similar intertwined domains structural repeat: beta-alpha-beta(2)-alpha-beta; two layers, alpha/beta
DNA clamp [55978] (1) contains two helices and two beta sheets duplication: fold has internal pseudo two-fold symmetry
Hypothetical protein TM0160 [103255] (1) duplication: consists of two beta(3)-alpha(2) structural repeats; single barrel-like beta-sheet
TTHC002-like [160760] (1) alpha-beta-alpha-beta(3); forms dimer with a single beta-sheet, folded in a barrel-like shape
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
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
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
Ribosomal protein S8 [56046] (1) consists of 2 different alpha+beta subdomains arranged in a 4-layer structure: b/a/b/a
Ribosomal protein L6 [56052] (1) consists of two beta-sheets and one alpha-helix packed around single core
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
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
RGC domain-like [143884] (1) consists of two beta-sheets and four helices eclosing a cental cavity
Smc hinge domain [75552] (1) consists of 2 different alpha+beta subdomains; forms subdomain-swapped dimers
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]
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
Prim-pol domain [56746] (1) consists of two alpha+beta domains
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
DNase I-like [56218] (1) contains beta-sandwich; duplication of alpha+beta motif
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
Ntn hydrolase-like [56234] (2) 4 layers: alpha/beta/beta/alpha; has an unusual sheet-to-sheet packing
DmpA/ArgJ-like [56265] (1) duplication of beta(3)-alpha-beta-alpha motif; 4 layers: alpha/beta/beta/alpha
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
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)
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
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
Jann2411-like [160903] (1) unusual fold; consists of seven alpha-helices and three beta-hairpins
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
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
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
Hypothetical protein PH1602 [103364] (1) complex alpha+beta fold; contains a region of similarity to the ferredoxin-like fold
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
DNA methylase specificity domain [116733] (1) comprises the N-terminal, double beta-helix like structure and C-terminal alpha-hairpin
GCM domain [90072] (1) consists of two different alpha+beta subdomains; 2 zinc-binding sites
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
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)]
PSTPO5379-like [160919] (1) complex fold; consists of two alpha+beta subdomains, one is inserted in the other
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)
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
ORC1-binding domain [144004] (1) complex fold, composed of an alpha hairpin, meander beta-sheet and a five-stranded barrel of unusual topology
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
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]
Serpins [56573] (1) contains a cluster of helices and a beta-sandwich
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
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
Antivirulence factor [103382] (1) contains a helical bundle with a buried helix and an alpha+beta insert domain
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
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]
YacF-like [160949] (1) 2 domains; d1: kinked four-helical bundle, inserted in d2: beta-sandwich of 7 strands in two sheets
Virulence-associated V antigen [103387] (1) consists of an all-alpha and alpha+beta domains connected by antiparallel coiled coil
Carbohydrate phosphatase [56654] (1) N-terminal domain is an alpha+beta, C-terminal domain is an alpha/beta with mixed beta-sheet
DNA/RNA polymerases [56671] (1) divided into morphological domains including "palm", "thumb" and "fingers"; the catalytic "palm" domain is conserved to all members
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
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)]
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
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
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]
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]
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
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]
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)
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
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)
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
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
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)
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]
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
NSP3 homodimer [69902] (1) 2 domains: (1) all-alpha, (2) alpha+beta; asymmetric homodimer with each domain intertwining with its counterpart
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
Membrane penetration protein mu1 [69907] (1) 4 domains: three intertwined predominately alpha domains and one jelly-roll beta-sandwich
Flu NP-like [161002] (1) consists of alpha+beta and all-alpha domains; biological unit is a trimer
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")
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
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]
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
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
ATP synthase D chain-like [161064] (1) non-globular, mostly helical component of the stator subcomplex
Aquaporin-like [81339] (1) core: 8 helices, 2 short helices are surrounded by 6 long transmembrane helices
Ammonium transporter [111351] (1) 11 transmembrane helices; duplication: consist of 2 structural repeats of five helices each plus extra C-terminal helix
MFS general substrate transporter [103472] (1) 12 transmembrane helices; duplication: the N- and C-terminal halves are structurally similar
SNF-like [161069] (1) 12 transmembrane helices; duplication: consists of two structurally similar halves
Proton glutamate symport protein [118214] (1) multihelical membrane protein; partial structural duplication in the C-terminal region; oligomeric state: trimer
Calcium ATPase, transmembrane domain M [81666] (1) core: multihelical; consists of three transmembrane regions of 2, 2 and 6 helices, separated by cytoplasmic domains
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
Transmembrane beta-barrels [56924] (6) not a true fold, gathers together transmembrane barrels of different (n,S)
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
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
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
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
Small proteins [56992] (90)
Usually dominated by metal ligand, heme, and/or disulfide bridges
Insulin-like [56993] (1) nearly all-alpha can be classified as disulfide-rich
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)
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
AN1-like Zinc finger [118309] (1) dimetal(zinc)-bound alpha+beta fold; partial similarity to the Cysteine-rich domain fold (scop_cf 57888)
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)
CHY zinc finger-like [161218] (1) trimetal-bound fold; integration of HIT/MYND-like and rubredoxin-like fingers
TAZ domain [57932] (1) all-alpha fold; Zn-binding sites are in the loops connecting helices
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
Coronavirus NSP10-like [144245] (1) binds two zinc ion per subunit; forms a dodecameric shell
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
