Class a: All alpha proteins [46456] (226 folds) |
Fold 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 |
a.4.1: Homeodomain-like [46689] (13 families) consists only of helices |
a.4.2: Methylated DNA-protein cysteine methyltransferase, C-terminal domain [46767] (1 family) |
a.4.3: ARID-like [46774] (1 family) contains extra helices at both N- and C-termini |
a.4.5: "Winged helix" DNA-binding domain [46785] (61 families) contains a small beta-sheet (wing) |
a.4.6: C-terminal effector domain of the bipartite response regulators [46894] (3 families) binds to DNA and RNA polymerase; the N-terminal, receiver domain belongs to the CheY family |
a.4.7: Ribosomal protein L11, C-terminal domain [46906] (1 family) |
a.4.8: Ribosomal protein S18 [46911] (1 family) |
a.4.9: Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 [46915] (1 family) |
a.4.10: N-terminal Zn binding domain of HIV integrase [46919] (1 family) |
a.4.11: RNA polymerase subunit RPB10 [46924] (1 family) |
a.4.12: TrpR-like [48295] (2 families) contains an extra shared helix after the HTH motif |
a.4.13: Sigma3 and sigma4 domains of RNA polymerase sigma factors [88659] (3 families) |
a.4.14: KorB DNA-binding domain-like [109709] (1 family) contains HTH motif in the common core; also contains extra N-terminal helix and C-terminal subdomain of 4 helices (left-handed superhelix) |
a.4.15: Rps17e-like [116820] (1 family) |
Timeline for Fold a.4: DNA/RNA-binding 3-helical bundle: