Abstract

Vibrio spp. are highly motile Gram-negative bacteria, ubiquitously found in aquatic environments. Some Vibrios are responsible for disease and morbidity of marine invertebrates and humans, while others are studied for their symbiotic interactions. Vibrio spp. are motile due to synthesis of flagella that rotate and propel the bacteria. Many Vibrio spp. synthesize monotrichous polar flagella (e.g., V. cholerae, V. alginolyticus); however, some synthesize peritrichous or lophotrichous flagella. Flagellar-mediated motility is intimately connected to biological and cellular processes such as chemotaxis, biofilm formation, colonization, and virulence of Vibrio spp. This review focuses on the polar flagellum and its regulation in regard to Vibrio virulence and environmental persistence.

Highlights

  • Vibrio spp. are highly motile Gram-negative bacteria that are ubiquitous in aquatic environments

  • Some Vibrios are responsible for human illnesses such as cholera (V. cholerae), vibriosis (V. parahaemolyticus), and wound infections (V. vulnificus), while others are studied for their symbiotic interactions (V. fischeri)

  • Flagellar-mediated motility is intimately connected to processes such as chemotaxis, biofilm formation, colonization, and virulence of Vibrio spp. (McCarter, 2004; Butler and Camilli, 2005; Yildiz and Visick, 2009; Yoon et al, 2012; Teschler et al, 2015; Wang et al, 2017)

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Summary

Vibrio Flagellar Synthesis

Vibrio spp. are highly motile Gram-negative bacteria, ubiquitously found in aquatic environments. Some Vibrios are responsible for disease and morbidity of marine invertebrates and humans, while others are studied for their symbiotic interactions. Vibrio spp. are motile due to synthesis of flagella that rotate and propel the bacteria. Many Vibrio spp. synthesize monotrichous polar flagella (e.g., V. cholerae, V. alginolyticus); some synthesize peritrichous or lophotrichous flagella. Flagellar-mediated motility is intimately connected to biological and cellular processes such as chemotaxis, biofilm formation, colonization, and virulence of Vibrio spp. This review focuses on the polar flagellum and its regulation in regard to Vibrio virulence and environmental persistence. Specialty section: This article was submitted to Molecular Bacterial Pathogenesis, a section of the journal Frontiers in Cellular and Infection.

INTRODUCTION
FLAGELLAR STRUCTURE
The H Ring
Multiple Flagellin Subunits
Flagellar Sheath
FLAGELLAR TRANSCRIPTION HIERARCHY
MOTILITY AND VIRULENCE
CHEMOTAXIS AND VIRULENCE
MOTILITY AND BIOFILM FORMATION
PERSPECTIVES AND FUTURE DIRECTIONS

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