The RpoS sigma factor in the dissimilatory Fe(III)-reducing bacterium Geobacter sulfurreducens

J Bacteriol. 2004 Aug;186(16):5543-6. doi: 10.1128/JB.186.16.5543-5546.2004.


Geobacter sulfurreducens RpoS sigma factor was shown to contribute to survival in stationary phase and upon oxygen exposure. Furthermore, a mutation in rpoS decreased the rate of reduction of insoluble Fe(III) but not of soluble forms of iron. This study suggests that RpoS plays a role in regulating metabolism of Geobacter under suboptimal conditions in subsurface environments.

Publication types

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

MeSH terms

  • Adaptation, Physiological
  • Bacterial Proteins / genetics*
  • Bacterial Proteins / physiology*
  • Base Sequence
  • Ferric Compounds / metabolism
  • Gene Expression Regulation, Bacterial*
  • Genes, Bacterial
  • Geobacter / genetics*
  • Geobacter / growth & development
  • Geobacter / metabolism
  • Geobacter / physiology*
  • Molecular Sequence Data
  • Mutation
  • Oxidation-Reduction
  • Oxidative Stress
  • Sigma Factor / genetics*
  • Sigma Factor / physiology*
  • Transcription Initiation Site


  • Bacterial Proteins
  • Ferric Compounds
  • Sigma Factor
  • sigma factor KatF protein, Bacteria