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A novel antimicrobial approach based on the inhibition of zinc uptake in Salmonella enterica.

In this review we discuss evidences suggesting that bacterial zinc homeostasis represents a promising target for new antimicrobial strategies. The ability of the gut pathogen Salmonella enterica sv Typhimurium to withstand the host responses aimed at controlling growth of the pathogen critically depends on the zinc importer ZnuABC. Strains lacking a functional ZnuABC or its soluble component ZnuA display a dramatic loss of pathogenicity, due to a reduced ability to express virulence factors; withstand the inflammatory response; and compete with other gut microbes. Based on this data, ZnuA was chosen as a candidate for the rational design of novel antibiotics. Through a combination of structural and functional investigations, we have provided a proof of concept of the potential of this approach.