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Updated: May 5, 2026
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Laboratory Techniques Used to Maintain and Differentiate Biotypes of Vibrio cholerae Clinical and Environmental Isolates
Published on: May 30, 2017
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Parallel quorum sensing systems converge to regulate virulence in Vibrio cholerae
Melissa B Miller1, Karen Skorupski, Derrick H Lenz
1Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA.
Cell
|August 15, 2002
Summary
Vibrio cholerae utilizes a complex quorum sensing system with at least three parallel channels to regulate virulence. This study identifies a novel autoinducer synthase and sensor, revealing a sophisticated communication network in this bacterium.
Area of Science:
- Microbiology
- Bacterial communication
- Quorum sensing
Background:
- Vibrio harveyi has two quorum sensing systems regulating bioluminescence.
- Vibrio cholerae genome suggests a V. harveyi-like System 2 but lacks clear System 1 or target genes.
- The complexity of V. cholerae quorum sensing remains largely uncharacterized.
Purpose of the Study:
- To identify and characterize additional quorum sensing components in Vibrio cholerae.
- To elucidate the quorum sensing regulatory network controlling virulence in V. cholerae.
- To investigate the convergence of multiple signaling pathways in V. cholerae communication.
Main Methods:
- Gene identification and characterization of autoinducer synthase and sensor.
- Construction and analysis of double mutants.
- Investigation of quorum sensing circuit convergence.
Main Results:
- Identification and characterization of a novel autoinducer synthase and its cognate sensor in V. cholerae.
- Analysis of double mutants revealed a third, previously unidentified sensory circuit.
- Demonstrated that V. cholerae quorum sensing involves at least three parallel signaling channels.
- Showed convergence of these communication systems to control bacterial virulence.
Conclusions:
- Vibrio cholerae possesses a highly complex quorum sensing apparatus with at least three parallel signaling channels.
- This intricate communication network converges to regulate critical virulence pathways in V. cholerae.
- The findings expand our understanding of bacterial social behavior and virulence regulation.
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