title: Postexponential regulation of sin operon expression in Bacillus subtilis.
abstract: The expression of many gene products required during the early stages of Bacillus subtilis sporulation is regulated by sinIR operon proteins. Transcription of sinIR from the P1 promoter is induced at the end of exponential growth. In vivo transcription studies suggest that P1 induction is repressed by the transition-state regulatory protein Hpr and is induced by the phosphorylated form of Spo0A. In vitro DNase I footprinting studies confirmed that Hpr, AbrB, and Spo0A are trans-acting transcriptional factors that bind to the P1 promoter region of sinIR. We have also determined that the P1 promoter is transcribed in vitro by the major vegetative sigma factor, final sigma(A), form of RNA polymerase.
authors.affiliation: Department of Molecular and Cellular Biology, Division of Biochemistry and Molecular Biology, University of California, Berkeley, California 94720, USA.
authors.forename: Sasha H
authors.initials: SH
authors.lastname: Shafikhani
authors.forename: Ines
authors.initials: I
authors.lastname: Mandic-Mulec
authors.forename: Mark A
authors.initials: MA
authors.lastname: Strauch
authors.forename: Issar
authors.initials: I
authors.lastname: Smith
authors.forename: Terrance
authors.initials: T
authors.lastname: Leighton
mesh_terms: D001412:Bacillus subtilis / Q000235:genetics* / Q000254:growth & development; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism / Q000502:physiology; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism; D015964:Gene Expression Regulation, Bacterial; D008969:Molecular Sequence Data; D009876:Operon; D010731:Phosphoenolpyruvate Sugar Phosphotransferase System / Q000235:genetics / Q000378:metabolism; D010766:Phosphorylation; D011401:Promoter Regions, Genetic; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism; D012808:Sigma Factor / Q000378:metabolism; D013171:Spores, Bacterial / Q000254:growth & development; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D014158:Transcription, Genetic
chemical_list: C060762:AbrB protein, Bacillus subtilis; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; D012097:Repressor Proteins; D012808:Sigma Factor; C097712:SinI protein, Bacillus subtilis; C080950:Spo0A protein, Bacillus subtilis; D014157:Transcription Factors; C076733:FlaD protein, Bacteria; D010731:Phosphoenolpyruvate Sugar Phosphotransferase System; C030182:phosphocarrier protein HPr; C063505:RNA polymerase sigma A; D012321:DNA-Directed RNA Polymerases