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

  1. Root: SCOP 1.73
  2. 631650Class a: All alpha proteins [46456] (258 folds)
  3. 634286Fold 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. 636223Superfamily a.4.13: Sigma3 and sigma4 domains of RNA polymerase sigma factors [88659] (3 families) (S)

Families:

  1. 636224a.4.13.1: Sigma3 domain [88660] (3 proteins)
  2. 636256a.4.13.2: Sigma4 domain [88665] (4 proteins)
  3. 636302a.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

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: