Structural Classification of Proteins
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Fold: Ribbon-helix-helix

core: 4 helices; array of 2 hairpins, opened

Lineage:

  1. Root: scop
  2. Class: All alpha proteins [46456]
  3. Fold: Ribbon-helix-helix [47597]
    core: 4 helices; array of 2 hairpins, opened

Superfamilies:

  1. Ribbon-helix-helix [47598] (11)
    formerly Met repressor-like; dimeric proteins; the N-termini form a small beta-sheet ribbon
    link to SUPERFAMILY database - Superfamily
    1. Arc/Mnt-like phage repressors [47599] (2)
      1. Arc repressor [47600]
        1. Salmonella bacteriophage P22 [TaxId: 10754] [47601] (12)
          1. 1u9p picpic
            automatically matched to d1arqa_
            1. region a:72-107 [119649] picpiclink
          2. 1baz picpic
            mutant
            1. chain a [17421] picpiclink
            2. chain b [17422] picpiclink
            3. chain c [17423] picpiclink
            4. chain d [17424] picpiclink
          3. 1myk picpic
            mutant
            1. chain a [17425] picpiclink
            2. chain b [17426] picpiclink
          4. 1myl picpic
            mutant
            1. chain a [17427] picpiclink
            2. chain b [17428] picpiclink
            3. chain c [17429] picpiclink
            4. chain d [17430] picpiclink
            5. chain e [17431] picpiclink
            6. chain f [17432] picpiclink
          5. 1bdt picpic
            protein/DNA complex
            1. chain a [17433] picpiclink
            2. chain b [17434] picpiclink
            3. chain c [17435] picpiclink
            4. chain d [17436] picpiclink
          6. 1bdv picpic
            protein/DNA complex; mutant
            1. chain a [17441] picpiclink
            2. chain b [17442] picpiclink
            3. chain c [17443] picpiclink
            4. chain d [17444] picpiclink
          7. 1par picpic
            protein/DNA complex
            1. chain a [17437] picpiclink
            2. chain b [17438] picpiclink
            3. chain c [17439] picpiclink
            4. chain d [17440] picpiclink
          8. 1arq picpic
            1. chain a [17447] picpiclink
            2. chain b [17448] picpiclink
          9. 1arr picpic
            1. chain a [17449] picpiclink
            2. chain b [17450] picpiclink
          10. 1qtg picpic
            mutant
            1. chain a [17451] picpiclink
            2. chain b [17452] picpiclink
          11. 1b28 picpic
            myl mutant
            1. chain a [17445] picpiclink
            2. chain b [17446] picpiclink
          12. 1nla picpic
            a mutant with 3(10) helices replacing a wild-type beta-ribbon
            1. chain a [85848] picpiclink
            2. chain b [85849] picpiclink
      2. Mnt repressor [47602]
        1. Salmonella bacteriophage P22 [TaxId: 10754] [47603] (1)
          1. 1mnt picpic
            includes 15 residues common with the tetramerization domain
            mutant
            1. chain a [17453] picpiclink
            2. chain b [17454] picpiclink
    2. CopG-like [100970] (5)
      similar to the phage repressor family
      1. Transcriptional repressor CopG [47605]
        plasmid-encoded
        1. Streptococcus agalactiae [TaxId: 1311] [47606] (3)
          1. 2cpg picpic
            1. chain a [17455] picpiclink
            2. chain b [17456] picpiclink
            3. chain c [17457] picpiclink
          2. 1ea4 picpic
            1. chain a [64861] picpiclink
            2. chain b [64862] picpiclink
            3. chain d [64863] picpiclink
            4. chain e [64864] picpiclink
            5. chain f [64865] picpiclink
            6. chain g [64866] picpiclink
            7. chain h [64867] picpiclink
            8. chain j [64868] picpiclink
            9. chain k [64869] picpiclink
            10. chain l [64870] picpiclink
          3. 1b01 picpic
            1. chain a [17458] picpiclink
            2. chain b [17459] picpiclink
      2. Plasmid partition protein ParG [101203]
        1. Salmonella enterica [TaxId: 28901] [101204] (1)
          1. 1p94 picpic
            1. chain a [94380] picpiclink
            2. chain b [94381] picpiclink
      3. Nickel responsive regulator NikR, N-terminal domain [101205]
        1. Escherichia coli [TaxId: 562] [101206] (11)
          1. 2hza picpicxrefxref
            automatically matched to d1q5va1
            complexed with 3cm, ni
            1. region a:1-48 [136907] picpiclink
          2. 2hza picpicxrefxref
            automatically matched to d1q5va1
            complexed with 3cm, ni
            1. region b:1-43 [136909] picpiclink
          3. 1q5v picpicxref
            1. region a:1-48 [95937] picpiclink
            2. region b:1-48 [95939] picpiclink
            3. region c:1-48 [95941] picpiclink
            4. region d:1-48 [95943] picpiclink
          4. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region a:1-48 [136916] picpiclink
          5. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region b:1-48 [136918] picpiclink
          6. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region c:1-48 [136920] picpiclink
          7. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region d:1-48 [136922] picpiclink
          8. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region e:1-48 [136924] picpiclink
          9. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region f:1-48 [136926] picpiclink
          10. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region g:1-48 [136928] picpiclink
          11. 2hzv picpicxrefxrefxrefxrefxrefxrefxrefxref
            automatically matched to d1q5va1
            complexed with k, ni
            1. region h:1-48 [136930] picpiclink
        2. Archaeon Pyrococcus horikoshii [TaxId: 53953] [140543] (12)
          SQ O58316 1-50
          1. 2bj7 picpicxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, edo, ni, pg4
            1. region a:1-50 [128608] picpiclink
          2. 2bj7 picpicxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, edo, ni, pg4
            1. region b:1-50 [128610] picpiclink
          3. 2bj8 picpicxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, edo, epe, ni, pg4
            1. region a:1-50 [128612] picpiclink
          4. 2bj8 picpicxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, edo, epe, ni, pg4
            1. region b:1-50 [128614] picpiclink
          5. 2bj3 picpicxrefxrefxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, mg
            1. region a:1-50 [128600] picpiclink
          6. 2bj3 picpicxrefxrefxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, mg
            1. region b:2-50 [128602] picpiclink
          7. 2bj3 picpicxrefxrefxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, mg
            1. region c:1-50 [128604] picpiclink
          8. 2bj3 picpicxrefxrefxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, mg
            1. region d:2-50 [128606] picpiclink
          9. 2bj9 picpicxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with ni, pg4, po4
            1. region a:1-50 [128616] picpiclink
          10. 2bj9 picpicxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with ni, pg4, po4
            1. region b:1-50 [128618] picpiclink
          11. 2bj1 picpicxrefxref
            complexed with cl, ni
            1. region a:1-50 [128596] picpiclink
          12. 2bj1 picpicxrefxref
            automatically matched to 2BJ1 A:1-50
            complexed with cl, ni
            1. region b:1-50 [128598] picpiclink
      4. Uncharacterized protein HP0222 [158480]
        1. Helicobacter pylori [TaxId: 210] [158481] (2)
          SQ O25010 31-73
          1. 1x93 picpic
            1. region a:31-73 [145859] picpiclink
          2. 1x93 picpic
            automatically matched to 1X93 A:31-73
            1. region b:31-73 [145860] picpiclink
    3. Omega transcriptional repressor [100971] (1)
      plasmid-encoded, similar to the phage repressor family
      1. Omega transcriptional repressor [69031]
        1. Streptococcus pyogenes [TaxId: 1314] [69032] (13)
          1. 1irq picpic
            1. chain a [66297] picpiclink
            2. chain b [66298] picpiclink
          2. 2bnw picpic
            automatically matched to d1irqb_
            1. region a:23-71 [128857] picpiclink
          3. 2bnw picpic
            automatically matched to d1irqb_
            1. region b:23-71 [128858] picpiclink
          4. 2bnw picpic
            automatically matched to d1irqb_
            1. region c:23-71 [128859] picpiclink
          5. 2bnw picpic
            automatically matched to d1irqb_
            1. region d:25-71 [128860] picpiclink
          6. 2bnz picpic
            automatically matched to d1irqb_
            1. region a:23-71 [128863] picpiclink
          7. 2bnz picpic
            automatically matched to d1irqb_
            1. region b:23-71 [128864] picpiclink
          8. 2bnz picpic
            automatically matched to d1irqb_
            1. region c:23-71 [128865] picpiclink
          9. 2bnz picpic
            automatically matched to d1irqb_
            1. region d:25-71 [128866] picpiclink
          10. 2cax picpic
            automatically matched to d1irqb_
            1. region a:23-71 [130163] picpiclink
          11. 2cax picpic
            automatically matched to d1irqb_
            1. region b:23-71 [130164] picpiclink
          12. 2cax picpic
            automatically matched to d1irqb_
            1. region c:23-71 [130165] picpiclink
          13. 2cax picpic
            automatically matched to d1irqb_
            1. region d:25-71 [130166] picpiclink
    4. Met repressor, MetJ (MetR) [100972] (1)
      1. Met repressor, MetJ (MetR) [47607]
        1. Escherichia coli [TaxId: 562] [47608] (10)
          1. 1cmc picpic
            complexed with mg, sam
            1. chain a [17462] picpiclink
            2. chain b [17463] picpiclink
          2. 1cmb picpic
            complexed with po4
            1. chain a [17460] picpiclink
            2. chain b [17461] picpiclink
          3. 1mjk picpic
            complexed with po4; mutant
            1. chain a [17464] picpiclink
            2. chain b [17465] picpiclink
          4. 1mjl picpic
            complexed with sam; mutant
            1. chain a [17470] picpiclink
            2. chain b [17471] picpiclink
          5. 1mjo picpic
            protein/DNA complex; complexed with ca, sam; mutant
            1. chain a [17466] picpiclink
            2. chain b [17467] picpiclink
            3. chain c [17468] picpiclink
            4. chain d [17469] picpiclink
          6. 1mjm picpic
            protein/DNA complex; mutant
            1. chain a [17472] picpiclink
            2. chain b [17473] picpiclink
          7. 1mj2 picpic
            protein/DNA complex; complexed with ca, sam; mutant
            1. chain a [17474] picpiclink
            2. chain b [17475] picpiclink
            3. chain c [17476] picpiclink
            4. chain d [17477] picpiclink
          8. 1mjq picpic
            protein/DNA complex; complexed with sam; mutant
            1. chain a [17478] picpiclink
            2. chain b [17479] picpiclink
            3. chain c [17480] picpiclink
            4. chain d [17481] picpiclink
            5. chain g [17482] picpiclink
            6. chain h [17483] picpiclink
            7. chain i [17484] picpiclink
            8. chain j [17485] picpiclink
          9. 1cma picpic
            protein/DNA complex; complexed with sam
            1. chain a [17486] picpiclink
            2. chain b [17487] picpiclink
          10. 1mjp picpic
            protein/DNA complex; mutant
            1. chain a [17488] picpiclink
            2. chain b [17489] picpiclink
    5. NE0241-like [140544] (1)
      contains extra C-terminal long helix; currently consists of an orphan protein
      1. Hypothetical protein NE0241 [140545]
        1. Nitrosomonas europaea [TaxId: 915] [140546] (1)
          SQ Q82XL7 10-95
          1. 1zx3 picpic
            1. region a:10-95 [125762] picpiclink
    6. SeqA N-terminal domain-like [140547] (1)
      N-terminal part of Pfam 03925
      1. SeqA [140548]
        a negative modulator of replication initiation
        1. Escherichia coli [TaxId: 562] [140549] (4)
          SQ P0AFY8 1-35
          1. 1xrx picpic
            complexed with ca
            1. region a:1-35 [122264] picpiclink
          2. 1xrx picpic
            automatically matched to 1XRX A:1-35
            complexed with ca
            1. region b:1-35 [122265] picpiclink
          3. 1xrx picpic
            automatically matched to 1XRX A:1-35
            complexed with ca
            1. region c:1-35 [122266] picpiclink
          4. 1xrx picpic
            automatically matched to 1XRX A:1-35
            complexed with ca
            1. region d:1-35 [122267] picpiclink
    7. Trafficking protein A-like [140550] (1)
      1. Trafficking protein A [140551]
        1. Neisseria gonorrhoeae [TaxId: 485] [140552] (8)
          SQ Q5F881 2-70
          1. 2bsq picpicxrefxrefxrefxref
            complexed with 5iu; mutant
            1. region e:2-70 [129102] picpiclink
          2. 2bsq picpicxrefxrefxrefxref
            automatically matched to 2BSQ E:2-70
            complexed with 5iu; mutant
            1. region f:2-66 [129103] picpiclink
          3. 2bsq picpicxrefxrefxrefxref
            automatically matched to 2BSQ E:2-70
            complexed with 5iu; mutant
            1. region g:2-69 [129104] picpiclink
          4. 2bsq picpicxrefxrefxrefxref
            automatically matched to 2BSQ E:2-70
            complexed with 5iu; mutant
            1. region h:2-65 [129105] picpiclink
          5. 2h1o picpicxrefxrefxrefxref
            complexed with 5iu; mutant
            1. region e:2-69 [145278] picpiclink
          6. 2h1o picpicxrefxrefxrefxref
            automatically matched to 2H1O E:2-69
            complexed with 5iu; mutant
            1. region f:2-65 [145279] picpiclink
          7. 2h1o picpicxrefxrefxrefxref
            automatically matched to 2H1O E:2-69
            complexed with 5iu; mutant
            1. region g:2-68 [145280] picpiclink
          8. 2h1o picpicxrefxrefxrefxref
            automatically matched to 2H1O E:2-69
            complexed with 5iu; mutant
            1. region h:2-64 [145281] picpiclink
    8. VCA0319-like [140553] (1)
      COG4453; extended and extra C-terminal helices; potential component of the bi-partite system also including an acetyltransferase
      1. Hypothetical protein VCA0482 (VCA0319) [140554]
        Proteins of identical sequence, VCA0482 VCA0319 are encoded by two different genes
        1. Vibrio cholerae [TaxId: 666] [140555] (2)
          SQ Q9K2J6 3-83
          1. 1y9b picpic
            1. region a:3-83 [122777] picpiclink
          2. 1y9b picpic
            automatically matched to 1Y9B A:3-83
            1. region b:6-83 [122778] picpiclink
    9. VirC2-like [158482] (1)
      Pfam 07181; duplicated ribbon-helix-helix motif; fold forms a trefoil knot
      1. VirC2 [158483]
        Encoded by Ti plasmid
        1. Agrobacterium tumefaciens [TaxId: 358] [158484] (1)
          SQ P07166 82-202
          1. 2rh3 picpic
            1. region a:82-202 [152027] picpiclink
    10. PutA pre-N-terminal region-like [158485] (1)
      in PutA it forms a separate ribbon-helix-helix domain connected to the N-terminal enzymatic domain by a flexible linker
      1. Bifunctional protein putA [158486]
        1. Escherichia coli [TaxId: 562] [158487] (6)
          SQ P09546 3-45
          1. 2ay0 picpic
            complexed with cl; mutant
            1. region a:3-45 [146077] picpiclink
          2. 2ay0 picpic
            automatically matched to 2AY0 A:3-45
            complexed with cl; mutant
            1. region b:3-44 [146078] picpiclink
          3. 2ay0 picpic
            automatically matched to 2AY0 A:3-45
            complexed with cl; mutant
            1. region c:3-45 [146079] picpiclink
          4. 2ay0 picpic
            automatically matched to 2AY0 A:3-45
            complexed with cl; mutant
            1. region d:3-45 [146080] picpiclink
          5. 2ay0 picpic
            automatically matched to 2AY0 A:3-45
            complexed with cl; mutant
            1. region e:3-45 [146081] picpiclink
          6. 2ay0 picpic
            automatically matched to 2AY0 A:3-45
            complexed with cl; mutant
            1. region f:3-45 [146082] picpiclink
    11. MJ0366-like [158488] (1)
      PfamB 022101; duplicated ribbon-helix-helix motif; forms trefoil knot; predicted DNA binding
      1. Uncharacterized protein MJ0366 [158489]
        1. Methanococcus jannaschii [TaxId: 2190] [158490] (1)
          SQ Q57812 6-87
          1. 2efv picpic
            complexed with po4
            1. region a:6-87 [146819] picpiclink
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MRC site Generated from scop database 1.75 with scopm 1.101 on Wed Jun 3 10:42:06 2009
Copyright © 1994-2009 The scop authors / scop@mrc-lmb.cam.ac.uk