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Deciphering the genomes of motility-deficient mutants of Vibrio alginolyticus 138-2

Kazuma Uesaka1,2, Keita Inaba1, Noriko Nishioka3

  • 1Center for Gene Research, Nagoya University, Nagoya, Aichi, Japan.

Peerj
|March 22, 2024
PubMed

Insights

Vibrio alginolyticus motility is crucial for survival and pathogenicity. Whole genome sequencing of mutant strains identified specific mutations in flagellar genes, advancing our understanding of bacterial movement and chemotaxis.

Area of Science:

  • Microbiology
  • Genomics
  • Molecular Biology

Background:

  • Bacterial motility, particularly in Vibrio species, is essential for environmental adaptation and pathogenicity in aquatic animals and humans.
  • Understanding the genetic basis of flagellar motility in Vibrio alginolyticus is key to deciphering its survival strategies and pathogenic mechanisms.

Purpose of the Study:

  • To identify specific mutations affecting flagellar motility in Vibrio alginolyticus using whole genome sequencing.
  • To correlate genetic mutations with observed motility defects, including flagellar deficiency, multi-flagellar arrangements, and chemotaxis deficiencies.

Main Methods:

  • Generation of mutant strains of Vibrio alginolyticus using UV or EMS mutagenesis.
  • Whole genome sequencing of reference and mutant strains.
  • Mapping of mutations to the parental genome to identify specific genetic alterations.

Main Results:

  • Determined the complete genomic structure of four reference Vibrio alginolyticus strains.
  • Identified an average of 20.6 mutations per mutant strain, mostly randomly distributed.
  • Detected multiple mutations in six flagellar-related genes in chemotaxis-deficient mutants.

Conclusions:

  • Genomic analysis of numerous mutant strains is an effective forward genetics approach to identify genes linked to specific phenotypes.
  • The study provides insights into the protein structural physiology of flagellar motility in Vibrio species.
  • Findings contribute to a deeper understanding of Vibrio alginolyticus motility and its implications for pathogenicity.
Keywords:
FlagellaGenomeMotilityMutagenesisVibrio

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