Lineage for Superfamily a.4.13: Sigma3 and sigma4 domains of RNA polymerase sigma factors

  1. Root: SCOPe 2.06
  2. 1976409Class a: All alpha proteins [46456] (289 folds)
  3. 1981563Fold a.4: DNA/RNA-binding 3-helical bundle [46688] (14 superfamilies)
    core: 3-helices; bundle, closed or partly opened, right-handed twist; up-and down
  4. 1985191Superfamily a.4.13: Sigma3 and sigma4 domains of RNA polymerase sigma factors [88659] (4 families) (S)

Families:

  1. 1985192a.4.13.1: Sigma3 domain [88660] (3 proteins)
  2. 1985225a.4.13.2: Sigma4 domain [88665] (5 proteins)
  3. 1985282a.4.13.3: YlxM/p13-like [109706] (2 proteins)
    Pfam PF04297; UPF0122
    structural and detectable sequence similarity to Sigma4 domain; contains extra C-terminal all-alpha oligomerization subdomain; forms different, helix-swapped dimers
  4. 1985292a.4.13.0: automated matches [254211] (1 protein)
    not a true family

More info for Superfamily a.4.13: Sigma3 and sigma4 domains of RNA polymerase sigma factors

Timeline for Superfamily a.4.13: Sigma3 and sigma4 domains of RNA polymerase sigma factors: