| Class a: All alpha proteins [46456] (284 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 |
Superfamily a.4.13: Sigma3 and sigma4 domains of RNA polymerase sigma factors [88659] (3 families) ![]() |
| Family a.4.13.2: Sigma4 domain [88665] (4 proteins) |
| Sigma factor sigma-28 (FliA) [101057] (1 species) |
| Species Aquifex aeolicus [TaxId:63363] [101058] (2 PDB entries) |
| Sigma70 (SigA, RpoD) [88666] (4 species) |
| Species Escherichia coli [TaxId:562] [116816] (2 PDB entries) Uniprot P00579 546-613 |
| Species Thermotoga maritima [TaxId:2336] [116817] (1 PDB entry) Uniprot P77994 313-399 |
| Species Thermus aquaticus [TaxId:271] [88669] (3 PDB entries) |
| Species Thermus thermophilus [TaxId:274] [88667] (9 PDB entries) Uniprot Q9WX78 |
| SigmaE factor (RpoE) [88993] (1 species) |
| Species Escherichia coli [TaxId:562] [88994] (2 PDB entries) |
| SigmaF [74769] (1 species) |
| Species Bacillus stearothermophilus [TaxId:1422] [74770] (1 PDB entry) |
Timeline for Family a.4.13.2: Sigma4 domain: