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The Bacillus subtilis heat shock stimulon.

Wolfgang Schumann1

  • 1Institute of Genetics, University of Bayreuth, D-95440 Bayreuth, Germany. wschumann@uni-bayreuth.de

Cell Stress & Chaperones
|February 27, 2004
PubMed
Summary

Organisms use heat shock response to survive temperature increases by activating heat shock genes. Bacillus subtilis employs at least 6 regulons, coordinated by 5 regulators, to manage this stress response.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • Organisms activate heat shock response to cope with increased temperatures.
  • Heat shock response involves inducing specific genes coding for heat shock proteins.
  • In eubacteria, heat shock genes are organized into regulons, each controlled by distinct transcriptional regulators.

Purpose of the Study:

  • To detail the heat shock response in Bacillus subtilis.
  • To identify and categorize the regulons comprising the heat shock stimulon in B. subtilis.
  • To discuss potential thermosensors involved in heat shock gene regulation.

Main Methods:

  • Analysis of gene induction in response to heat shock.
  • Identification and characterization of transcriptional regulators.
  • Mapping of heat shock genes to specific regulons.

Main Results:

  • Over 200 genes in B. subtilis (7% of active genes) are induced ≥3-fold by heat shock.
  • The heat shock response in B. subtilis is rapid (within 1 minute), transient, and complex.
  • At least 6 regulons constitute the B. subtilis heat shock stimulon, coordinated by ≥5 transcriptional regulators.

Conclusions:

  • The B. subtilis heat shock stimulon is a complex network involving multiple regulons and regulators.
  • Understanding these regulatory mechanisms is crucial for comprehending bacterial stress adaptation.
  • Further research into thermosensors could reveal novel regulatory insights.

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