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Updated: May 19, 2025

TransFLP — A Method to Genetically Modify Vibrio cholerae Based on Natural Transformation and FLP-recombination

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Published on: October 8, 2012

Exploring Mobile Genetic Elements in Vibrio cholerae.

Natália C Drebes Dörr¹, Alexandre Lemopoulos¹, Melanie Blokesch¹

¹Laboratory of Molecular Microbiology, Global Health Institute, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.

Genome Biology and Evolution

|April 30, 2025

Summary

This summary is machine-generated.

Environmental Vibrio cholerae strains harbor diverse mobile genetic elements and novel defense systems. These elements, integrated into genomic hotspots, enhance bacterial adaptability against phages and contribute to pandemic strain evolution.

Keywords:

Vibrio cholerae bacterial immunity defense systems horizontal gene transfer mobile genetic elements phages

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Area of Science:

Microbiology
Genomics
Evolutionary Biology

Background:

Vibrio cholerae are marine bacteria and the cause of cholera.
Pandemic strains are well-studied, but environmental strains remain less understood.
Environmental strains contribute significantly to the V. cholerae pangenome.

Purpose of the Study:

To investigate mobile genetic elements (MGEs), bacterial defense systems, and phage-associated signatures in V. cholerae.
To compare genomic diversity between pandemic and environmental strains.
To understand the evolutionary pathways and adaptive strategies of V. cholerae.

Main Methods:

Genome sequencing and comparative analysis of 46 V. cholerae strains.
Identification and characterization of mobile genetic elements (MGEs).
Analysis of bacterial defense systems (defensome) and phage-associated sequences.

Main Results:

Identified conserved and novel MGEs across diverse V. cholerae strains.
Discovered a wide array of antiphage/antiplasmid defense mechanisms beyond CRISPR-Cas and restriction-modification systems.
Found MGEs integrated into genomic hotspots, facilitating defense system exchange.

Conclusions:

Nonpandemic environmental strains may act as reservoirs for novel defense strategies.
Genomic hotspots serve as platforms for the exchange of defense systems, enhancing V. cholerae's adaptive capabilities.
This research provides insights into V. cholerae's genetic complexity, adaptive potential, and the evolution of pandemic strains.