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Related Experiment Videos

Self-sensing in Bacillus subtilis quorum-sensing systems.

Tasneem Bareia1, Shaul Pollak1, Avigdor Eldar2

  • 1School of Molecular Cell Biology and Biotechnology, Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, 6997801, Israel.

Nature Microbiology
|October 18, 2017
PubMed
Summary
This summary is machine-generated.

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Bacteria use quorum sensing to communicate. This study reveals that bacteria can sense their own signals, a process called self-sensing, which enhances their response and impacts antibiotic resistance.

Area of Science:

  • Microbiology
  • Bacterial Physiology
  • Molecular Biology

Background:

  • Bacterial quorum sensing coordinates group behavior via autoinducer molecules.
  • The role of self-sensing (responding to one's own signals) in bacterial physiology remains unclear.

Purpose of the Study:

  • To investigate the existence and impact of self-sensing in Bacillus subtilis quorum sensing systems (ComQXP and Rap-Phr).
  • To determine if self-sensing directly influences quorum sensing response strength and bacterial physiology.

Main Methods:

  • Comparative co-culture experiments of autoinducer-secreting and non-secreting cells.
  • Genetic and quantitative analyses to elucidate regulatory mechanisms.
  • Assessment of antibiotic treatment persistence.

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Main Results:

  • Autoinducer-secreting cells exhibit a consistently stronger quorum sensing response than non-secreting cells.
  • This enhanced response is a direct effect of self-sensing, not indirect gene regulation.
  • Self-sensing in the ComQXP system influences bacterial persistence to antibiotics.

Conclusions:

  • Self-sensing is a significant factor in bacterial quorum sensing, enhancing response strength.
  • This phenomenon is present in common Gram-positive bacterial quorum sensing system designs.
  • Self-sensing has implications for bacterial physiology, including antibiotic resistance.