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Investigation for Antimicrobial Resistance-Modulating Activity of Diethyl Malate and 1-Methyl Malate Against Beta-Lactamase Class a From Bacillus Licheniformis by Molecular Dynamics, in Vitro and in Vivo Studies Publisher Pubmed



Mirzaie S1 ; Najafi K1 ; Hakhamaneshi MS2 ; Shahverdi AR3 ; Fathi F4
Authors
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Authors Affiliations
  1. 1. Department of Biochemistry, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
  2. 2. Faculty of Medicine, Department of Biochemistry, Kurdistan University of Medical Science, Sanandaj, Iran
  3. 3. Faculty of Pharmacy and Biotechnology Research Center, Department of Pharmaceutical Biotechnology, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Cellular and Molecular Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran

Source: Journal of Biomolecular Structure and Dynamics Published:2015


Abstract

Resistance to antibiotics in bacteria, is one of the major problems of mankind. Each year, a large number of patients due to infection, lose their lives. One of the main mechanisms of antibiotic resistance is beta-lactamase secretion. This enzyme hydrolyzes the amide bond of a lactam ring in beta-lactam antibiotics. Bacillus licheniformis is a mesophilic gram-positive bacterium, which has a high potential to produce beta-lactamase class A. In this study, the inhibitory effects of some malate analogous were studied by in vitro and in vivo studies. In addition, the effects of inhibitor binding on beta-lactamase were studied using MD simulations. Our results showed that diethyl malate and 1-methyl malate can decrease the MIC value of benzyl penicillin by sixteen and eight-fold, respectively. Data derived from in vitro studies revealed that decrease in MIC values is correlated with beta-lactamase inhibition. Molecular docking studies predicted the binding mode of inhibitors with the beta-lactamase active site. The structural analysis from MD simulations exhibits that binding of citrate and diethyl malate causes earlier equilibrium of beta-lactamase. After binding, the fluctuation of Ser 70 is also decreased. Based on our data, diethyl malate can be used to design the potent inhibitor against beta-lactamase class A. © 2014 Taylor & Francis.
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