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Sugar-mediated Regulation of a C-di-GMP Phosphodiesterase in Vibrio Cholerae

Overview
Journal Nat Commun
Specialty Biology
Date 2019 Nov 27
PMID 31767877
Citations 15
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Abstract

Biofilm formation protects bacteria from stresses including antibiotics and host immune responses. Carbon sources can modulate biofilm formation and host colonization in Vibrio cholerae, but the underlying mechanisms remain unclear. Here, we show that EIIA, a component of the phosphoenolpyruvate (PEP):carbohydrate phosphotransferase system (PTS), regulates the intracellular concentration of the cyclic dinucleotide c-di-GMP, and thus biofilm formation. The availability of preferred sugars such as glucose affects EIIA phosphorylation state, which in turn modulates the interaction of EIIA with a c-di-GMP phosphodiesterase (hereafter referred to as PdeS). In a Drosophila model of V. cholerae infection, sugars in the host diet regulate gut colonization in a manner dependent on the PdeS-EIIA interaction. Our results shed light into the mechanisms by which some nutrients regulate biofilm formation and host colonization.

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