Postexponential regulation of sin operon expression in Bacillus subtilis

J Bacteriol. 2002 Jan;184(2):564-71. doi: 10.1128/JB.184.2.564-571.2002.

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.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Bacillus subtilis / genetics*
  • Bacillus subtilis / growth & development
  • Bacterial Proteins / genetics*
  • Bacterial Proteins / metabolism
  • Base Sequence
  • DNA, Bacterial
  • DNA-Binding Proteins / genetics*
  • DNA-Binding Proteins / metabolism
  • DNA-Binding Proteins / physiology
  • DNA-Directed RNA Polymerases / metabolism
  • Gene Expression Regulation, Bacterial*
  • Molecular Sequence Data
  • Operon*
  • Phosphoenolpyruvate Sugar Phosphotransferase System / genetics
  • Phosphoenolpyruvate Sugar Phosphotransferase System / metabolism
  • Phosphorylation
  • Promoter Regions, Genetic*
  • Repressor Proteins / genetics
  • Repressor Proteins / metabolism
  • Sigma Factor / metabolism
  • Spores, Bacterial / growth & development
  • Transcription Factors / genetics
  • Transcription Factors / metabolism
  • Transcription Factors / physiology
  • Transcription, Genetic

Substances

  • AbrB protein, Bacillus subtilis
  • Bacterial Proteins
  • DNA, Bacterial
  • DNA-Binding Proteins
  • Repressor Proteins
  • Sigma Factor
  • SinI protein, Bacillus subtilis
  • Spo0A protein, Bacillus subtilis
  • Transcription Factors
  • FlaD protein, Bacteria
  • Phosphoenolpyruvate Sugar Phosphotransferase System
  • phosphocarrier protein HPr
  • RNA polymerase sigma A
  • DNA-Directed RNA Polymerases