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Vibrio proteolyticus

ABSTRACT: Vibrio proteolyticus overview

PROVIDER: PRJNA172511 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	BATJ01.dat.gz	Other
	BATJ01.fasta.gz	Fasta.gz
	BATJ01.master.dat	Other

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Comparative proteomics for the secretome of Vibrio proteolyticus T6SS3

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Proteomics Analysis Reveals Previously Uncharacterized Virulence Factors in Vibrio proteolyticus

Project description:Members of the genus Vibrio include many pathogens of humans and marine animals that share genetic information via horizontal gene transfer. Hence, the Vibrio pan-genome carries the potential to establish new pathogenic strains by sharing virulence determinants, many of which have yet to be characterized. Here, we investigated the virulence properties of Vibrio proteolyticus, a Gram-negative marine bacterium previously identified as part of the Vibrio consortium isolated from diseased corals. We found that V. proteolyticus causes actin cytoskeleton rearrangements followed by cell lysis in HeLa cells in a contact independent manner. In search of the responsible virulence factor involved, we determined the V. proteolyticus secretome. This proteomics approach revealed various putative virulence factors, including active type VI secretion systems and effectors with virulence toxin domains; however, these type VI secretion systems were not responsible for the observed cytotoxic effects. Further examination of the V. proteolyticus secretome led us to hypothesize and subsequently demonstrate that a secreted hemolysin, belonging to a previously uncharacterized clan of the leukocidin superfamily, was the toxin responsible for the V. proteolyticus-mediated cytotoxicity in both HeLa cells and macrophages. Clearly, there remains an armory of yet-to-be discovered virulence factors in the Vibrio pan-genome that will undoubtedly provide a wealth of knowledge on how a pathogen can manipulate host cells.

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