Eo-E RNA polymerase transcribes a regulon of folding factors for the bacterial envelope and is induced by physical and chemical stresses. The RseA anti-sigma factor inhibits the activity of Esigma(E) RNA, polymerase. It is shown here that the N-terminal portion of sigma(E), residues 1-153, binds core RNA polymerase. RseA interacts with residues 154-191 of sigma(E), a site that is homologous to region 4, the sigma factor binding site for promoter DNA. Mutations that reduce transcription of Esigma(E) RNA polymerase map to sigma(E) residues 178, 181, and 183. Variant sigma(E) proteins with amino acid substitutions at residues 178, 181, or 183 do not associate with RseA. A regulatory mechanism is proposed whereby RseA binds to a C-terminal peptide of a-E and inhibits the transcription of Esigma(E) RNA polymerase by blocking promoter recognition.
Authors
- Christina Tam,
- Bruno Collinet,
- Gary Lau,
- prof. dr Satish Raina link open in new tab ,
- Dominique Missiakas
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1074/jbc.m202881200
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2002
