Anti-sigma-B factor RSBW_BACSU MKNNADYIEMKVPAQPEYVGIIRLTLSGVASRMGYTYDEIEDLKIAVSEACTNAVQHAYKEDKNGEVSIRFGVFEDRLEVIVADEGDSFDFDQKQQDLGPYTPSHTVDQLSEGGLGLYLMETLMDEVRVQNHSGVTVAMTKYLNGERVDHDTTIKNYETN rsbW Serine-protein kinase rsbW Sigma-B negative effector rsbW Negative regulator of sigma-B activity. Phosphorylates and inactivates its specific antagonist protein, rsbV. Upon phosphorylation of rsbV, rsbW is released and binds to sigma-B, thereby blocking its ability to form an RNA polymerase holoenzyme (E-sigma-B). 160 BSU04720