Detection and characterization of VIM-31, a new variant of VIM-2 with Tyr224His and His252Arg mutations, in a clinical isolate of Enterobacter cloacae.

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Detection and characterization of VIM-31, a new variant of VIM-2 with Tyr224His and His252Arg mutations, in a clinical isolate of Enterobacter cloacae.

Antimicrob Agents Chemother. 2012 Jun;56(6):3283-7

Authors: Bogaerts P, Bebrone C, Huang TD, Bouchahrouf W, Degheldre Y, Deplano A, Hoffmann K, Glupczynski Y

Abstract
We report the first description of the metallo-β-lactamase VIM-31, a new variant of VIM-2 with Tyr224His and His252Arg mutations, in Enterobacter cloacae 11236, which was isolated from blood specimens of a patient with colonic adenocarcinoma in Belgium. bla(VIM-31) was found on a class 1 integron located on a self-transferable but not typeable 42-kb plasmid. Compared to values published elsewhere for VIM-2, the purified VIM-31 enzyme showed weaker catalytic efficiency against all the tested beta-lactam agents (except for ertapenem), resulting from lower k(cat) (except for ertapenem) and higher K(m) values for VIM-31.

PMID: 22391550 [PubMed - indexed for MEDLINE]