Data/hora: 06/06/2024 18:19:31

Provedor de dados: | 5
País: | France
Título: | Metalloprotease Vsm Is the Major Determinant of Toxicity for Extracellular Products of Vibrio splendidus
Autores: | Binesse, J; Delsert, Claude; Saulnier, Denis; Champomier Verges, M; Zagorec, M; Munier Lehmann, H; Mazel, D; Le Roux, F.
Data: | 2008-12
Ano: | 2008
Resumo: | Genomic data combined with reverse genetic approaches have contributed to the characterization of major virulence factors of Vibrio species; however, these studies have targeted primarily human pathogens. Here, we investigate virulence factors in the oyster pathogen Vibrio splendidus LGP32 and show that toxicity is correlated to the presence of a metalloprotease and its corresponding vsm gene. Comparative genomics showed that an avirulent strain closely related to LGP32 lacked the metalloprotease. The toxicity of LGP32 metalloprotease was confirmed by exposing mollusk and mouse fibroblastic cell lines to extracellular products (ECPs) of the wild type (wt) and a vsm deletion mutant (Delta vsm mutant). The ECPs of the wt induced a strong cytopathic effect whose severity was cell type dependent, while those of the Delta vsm mutant were much less toxic, and exposure to purified protein demonstrated the direct toxicity of the Vsm metalloprotease. Finally, to investigate Vsm molecular targets, a proteomic analysis of the ECPs of both LGP32 and the Delta vsm mutant was performed, revealing a number of differentially expressed and/or processed proteins. One of these, the VSA1062 metalloprotease, was found to have significant identity to the immune inhibitor A precursor, a virulence factor of Bacillus thuringiensis. Deletion mutants corresponding to several of the major proteins were constructed by allelic exchange, and the ECPs of these mutants proved to be toxic to both cell cultures and animals. Taken together, these data demonstrate that Vsm is the major toxicity factor in the ECPs of V. splendidus.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/2008/publication-4931.pdf

DOI:10.1128/AEM.01261-08

Editor: | American society for microbiology
Relação: | http://archimer.ifremer.fr/doc/00000/4931/
Formato: | application/pdf
Fonte: | Applied and environmental microbiology (0099-2240) (American society for microbiology), 2008-12 , Vol. 74 , N. 23 , P. 7108-7117
Fonte: | 2008 American Society for Microbiology. All Rights Reserved.