Structural Classification of Proteins
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Superfamily: Prokaryotic type I DNA topoisomerase

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
link to SUPERFAMILY database - Superfamily

Lineage:

  1. Root: scop
  2. Class: Multi-domain proteins (alpha and beta) [56572]
    Folds consisting of two or more domains belonging to different classes
  3. Fold: Prokaryotic type I DNA topoisomerase [56711]
    4 domains: (1) Toprim alpha/beta; (2&4) "winged helix"-like; (3) barrel: n=6, S=8
  4. Superfamily: Prokaryotic type I DNA topoisomerase [56712]
    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
    link to SUPERFAMILY database - Superfamily

Families:

  1. Prokaryotic type I DNA topoisomerase [56713] (3)
    domain 4 contains the catalytic tyrosine residue
    1. DNA topoisomerase I, 67K N-terminal domain [56714]
      1. Escherichia coli [TaxId: 562] [56715] (12)
        1. 1mw9 picpic
          complexed with so4; mutant
          1. chain x [91480] picpiclink
        2. 1cy9 picpic
          2nd and 3rd domains
          1. chain a [43236] picpiclink
          2. chain b [43237] picpiclink
        3. 1mw8 picpic
          complexed with so4, t; mutant
          1. chain x [91479] picpiclink
        4. 1ecl picpic
          mutant
          1. chain a [43238] picpiclink
        5. 1cyy picpic
          2nd and 3rd domains
          complexed with zn
          1. chain a [43239] picpiclink
          2. chain b [43240] picpiclink
        6. 1cy2 picpic
          complexed with po4, tmp
          1. chain a [43241] picpiclink
        7. 1cy1 picpic
          complexed with po4, thp, tmp
          1. chain a [43242] picpiclink
        8. 1cy7 picpic
          complexed with po4, tmp; mutant
          1. chain a [43244] picpiclink
        9. 1cy8 picpic
          complexed with po4, t3p, tmp
          1. chain a [43243] picpiclink
        10. 1cy0 picpic
          complexed with a3p
          1. chain a [43245] picpiclink
        11. 1cy4 picpic
          complexed with po4, tmp
          1. chain a [43246] picpiclink
        12. 1cy6 picpic
          complexed with po4, t3p
          1. chain a [43247] picpiclink
    2. DNA topoisomerase III [56716]
      1. Escherichia coli [TaxId: 562] [56717] (2)
        1. 1i7d picpic
          complexed with cl, so4; mutant
          1. chain a [61886] picpiclink
        2. 1d6m picpic
          1. chain a [43248] picpiclink
    3. Topoisomerase "domain" of reverse gyrase [69890]
      1. Archaeon Archaeoglobus fulgidus [TaxId: 2234] [69891] (2)
        1. 1gku picpicxref
          mutant
          1. region b:499-1054 [65259] picpiclink
        2. 1gl9 picpicxref
          complexed with anp, mg; mutant
          1. region b:499-1054 [65293] picpiclink
          2. region c:499-1054 [65296] 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