| PDB | Method | Taxonomy | Organism | Name | Reference_pub | Resolution | Stage | Contents | Ligands |
|---|---|---|---|---|---|---|---|---|---|
| 1H3L | XRD | Prokaryote | Streptomyces coelicolor | N-terminal fragment of sig R from streptomyces coelicolor | 12381317 | 2.38 Å | Subunit | RNA POLYMERASE SIGMA FACTOR | |
| 2M6O | XRD | Prokaryote | Streptomyces coelicolor | The actinobacterial transcription factor RbpA binds to the principal sigma subunit of RNA polymerase | 23605043 | Subunit | Sigma factor subunit | ||
| 5FGM | XRD | Prokaryote | Streptomyces coelicolor | Streptomyces coelicolor sig R region 4 | 26775842 | 2.60 Å | Subunit | ECF RNA polymerase sigma factor sig R |