Abstract:
:Vibrio cholerae N-acetyl glucosamine-binding protein A (GbpA) is a chitin binding protein and a virulence factor involved in the colonization of human intestine. We investigated the distribution and genetic variations of gbpA in 488 V. cholerae strains of environmental and clinical origin, belonging to different serogroups and biotypes. We found that the gene is consistently present and highly conserved including an environmental V. cholerae-related strain of ancestral origin. The gene was also consistently expressed in a number of representative V. cholerae strains cultured in laboratory aquatic microcosms under conditions simulating those found in temperate marine environments. Functional analysis carried out on V. cholerae O1 El Tor N16961 showed that GbpA is not involved in adhesion to inorganic surfaces but promotes interaction with environmental biotic substrates (plankton and bivalve hepatopancreas cells) representing known marine reservoir or host for the bacterium. It is suggested that the ability of GbpA to colonize human intestinal cells most probably originated from its primary function in the aquatic environment.
journal_name
Environ Microbiol Repjournal_title
Environmental microbiology reportsauthors
Stauder M,Huq A,Pezzati E,Grim CJ,Ramoino P,Pane L,Colwell RR,Pruzzo C,Vezzulli Ldoi
10.1111/j.1758-2229.2012.00356.xsubject
Has Abstractpub_date
2012-08-01 00:00:00pages
439-45issue
4issn
1758-2229journal_volume
4pub_type
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