Current Topics in Medicinal Chemistry

Allen B. Reitz
Fox Chase Chemical Diversity Center, Inc.
Doylestown, PA
USA

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RND Efflux Pumps: Structural Information Translated into Function and Inhibition Mechanisms

Author(s): Paolo Ruggerone, Satoshi Murakami, Klaas M. Pos, Attilio V. Vargiu.

Abstract:

Efflux pumps of the Resistance Nodulation Division (RND) superfamily play a major role in the intrinsic and acquired resistance of Gram-negative pathogens to antibiotics. Moreover, they are largely responsible for multi-drug resistance (MDR) phenomena in these bacteria. The last decade has seen a sharp increase in the number of experimental and computational studies aimed at understanding their functional mechanisms. Most of these studies focused on the RND drug/proton antiporter AcrB, part of the AcrAB-TolC efflux pump actively recognizing and expelling noxious agents from the interior of bacteria. These studies have been focused on the dynamical interactions between AcrB and its substrates and inhibitors, on the details of the proton translocation mechanisms, and on the way AcrB assembles with protein partners to build up a functional pump. In this review we summarize these advances focusing on the role of AcrB.

Keywords: Multi-drug resistance, membrane barrier, efflux pumps, RND transporters, proton motive force, AcrAB-TolC, antibiotics, EPIs.

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Article Details

VOLUME: 13
ISSUE: 24
Year: 2013
Page: [3079 - 3100]
Pages: 22
DOI: 10.2174/15680266113136660220
Price: $58