Multiscale simulations of clavulanate inhibition identify the reactive complex in class A β-lactamases and predict efficiency of inhibition

Ruben Fritz, Jans H. Alzate-Morales, James Spencer, Adrian J. Mulholland, Marc W. Van Der Kamp

Research output: Contribution to journalArticle (Academic Journal)

7 Citations (Scopus)
170 Downloads (Pure)

Abstract

Clavulanate is used as an effective drug in combina-tion with β-lactam antibiotics to treat infections of some antibiotic resistant bacteria. Here, we per-form combined quantum mechanics / molecular mechanics simulations of several covalent com-plexes of clavulanate with class A β-lactamases KPC-2 and TEM-1. Simulations of the deacylation reactions identify the decarboxylated trans-enamine complex as responsible for inhibition. Further, the simulations correctly discriminate between enzymes that are effectively inhibited (TEM-1) from those that are not (KPC-2) providing a 'computational assay' for clinically relevant inhibition.

Original languageEnglish
Number of pages4
JournalBiochemistry
Early online date29 May 2018
DOIs
Publication statusE-pub ahead of print - 29 May 2018

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