HrpR and HrpS enhancer-binding proteins ofPseudomonas syringae activate σ54-dependent transcription of the HrpL promoter and are required for type-three secretion pathogenicity. Here, the authors demonstrate that, despite being co-regulated, HrpR and HrpS each have distinct functions for activating σ54.
- Milija Jovanovic
- Ellen H. James
- Jörg Schumacher
