From motility to virulence: Sensing and responding to environmental signals in Vibrio cholerae.

Abstract:

:Sensing its changing environment is key for Vibrio cholerae when making the transition from an aquatic lifestyle to one more suited to a human host. An inverse correlation between motility and virulence gene expression has been reported, with the NADH : ubiquinone oxidoreductase system which powers motility by generating a sodium-motive force, playing a pivotal role. Recent studies have demonstrated that bile inhibits activity of the transcription factor ToxT, a protein responsible for direct activation of numerous virulence gene promoters. In addition, recent technological advances have allowed for the analysis of in-vivo-induced genes and assessment of their timing of expression. Use of recombinase-based in vivo expression technology has revealed that the toxin-coregulated pilus (a colonization factor) is expressed before cholera toxin. Components of an acid-tolerance response system have also been found using this method as well as signature-tagged mutagenesis. Finally, a role for quorum sensing in regulation of virulence gene expression has recently been established.

journal_name

Curr Opin Microbiol

authors

Krukonis ES,DiRita VJ

doi

10.1016/s1369-5274(03)00032-8

subject

Has Abstract

pub_date

2003-04-01 00:00:00

pages

186-90

issue

2

eissn

1369-5274

issn

1879-0364

pii

S1369527403000328

journal_volume

6

pub_type

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