Structural Classification of Proteins
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Superfamily: Sigma3 and sigma4 domains of RNA polymerase sigma factors

link to SUPERFAMILY database - Superfamily

Lineage:

  1. Root: scop
  2. Class: All alpha proteins [46456]
  3. Fold: DNA/RNA-binding 3-helical bundle [46688]
    core: 3-helices; bundle, closed or partly opened, right-handed twist; up-and down
  4. Superfamily: Sigma3 and sigma4 domains of RNA polymerase sigma factors [88659]
    link to SUPERFAMILY database - Superfamily

Families:

  1. Sigma3 domain [88660] (3)
    1. Sigma70 [88661]
      1. Thermus thermophilus [TaxId: 274] [88662] (16) picpic
        SQ Q9WX78
    2. Sigma factor SigA [88663]
      1. Thermus aquaticus [TaxId: 271] [88664] (1) picpic
    3. Sigma factor sigma-28 (FliA) [101055]
      1. Aquifex aeolicus [TaxId: 63363] [101056] (2) picpic
  2. Sigma4 domain [88665] (7)
    1. Sigma70 (SigA, RpoD) [88666]
      1. Thermus thermophilus [TaxId: 274] [88667] (16) picpic
        SQ Q9WX78
      2. Escherichia coli [TaxId: 562] [116816] (2) picpic
        SQ P00579 546-613
      3. Thermotoga maritima [TaxId: 2336] [116817] (1) picpic
        SQ P77994 313-399
      4. Thermus aquaticus [TaxId: 271] [88669] (3) picpic
    2. SigmaE factor (RpoE) [88993]
      1. Escherichia coli [TaxId: 562] [88994] (3) picpic
    3. SigmaF [74769]
      1. Bacillus stearothermophilus [TaxId: 1422] [74770] (1) picpic
    4. Sigma factor sigma-28 (FliA) [101057]
      1. Aquifex aeolicus [TaxId: 63363] [101058] (2) picpic
  3. YlxM/p13-like [109706] (2)
    Pfam 04297; UPF0122
    structural and detectable sequence similarity to Sigma4 domain; contains extra C-terminal all-alpha oligomerization subdomain; forms different, helix-swapped dimers
    1. Hypothetical protein SPy1201 [109707]
      1. Streptococcus pyogenes [TaxId: 1314] [109708] (1) picpic
        SQ P67253
    2. Hypothetical protein SAV1236 [116818]
      1. Staphylococcus aureus, strain Mu50 / ATCC 700699 [TaxId: 1280] [116819] (1) picpic
        SQ P67248
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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