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Updated: Jul 16, 2026

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
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Published on: February 19, 2019

Anaerobic gene expression in Staphylococcus aureus.

Stephan Fuchs1, Jan Pané-Farré, Christian Kohler

  • 1Institut für Mikrobiologie, Ernst Moritz Arndt Universität, F. L. Jahn Str. 15, D-17487 Greifswald, Germany.

Journal of Bacteriology
|March 27, 2007
PubMed
Summary

Staphylococcus aureus switches to fermentation under anaerobic conditions, upregulating glycolytic and fermentation enzymes while downregulating the tricarboxylic acid cycle. This study reveals novel regulatory genes involved in anaerobic gene expression and potential links to virulence.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genomics

Background:

  • Staphylococcus aureus is an opportunistic pathogen with adaptable metabolic pathways.
  • Understanding its gene expression under different oxygen conditions is crucial for controlling infections.

Purpose of the Study:

  • To investigate gene expression changes in Staphylococcus aureus during the transition from aerobic to anaerobic growth.
  • To identify key enzymes and regulatory genes involved in anaerobic metabolism and potential virulence regulation.

Main Methods:

  • Proteomic and transcriptomic approaches were employed.
  • Gene expression levels were analyzed using mRNA analysis.
  • Fermentation products were quantified.

Main Results:

  • Anaerobic growth induced glycolytic and fermentation enzymes (e.g., lactate dehydrogenases, alcohol dehydrogenases) and suppressed tricarboxylic acid cycle enzymes.
  • NAD regeneration occurred via mixed acid and butanediol fermentation, with increased lactate and acetate.
  • Genes for nitrate respiration/reduction and virulence factors showed altered expression, alongside novel upregulated regulatory genes.

Conclusions:

  • Staphylococcus aureus exhibits significant metabolic reprogramming under anaerobic conditions, relying on fermentation.
  • The study identified potential virulence regulation mechanisms linked to oxygen availability.
  • New regulatory genes involved in anaerobic gene expression were discovered, highlighting the complexity of this process.