Oligopeptides as full-length New Delhi metallo-β-lactamase-1 NDM-1 inhibitorsReport as inadecuate

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‘Superbug’ bacteria producing NDM-1 enzyme causing wide public concern were first detected in a patient who visited India in 2008. It-s an effective approach to combining β-lactam antibiotics with NDM-1 inhibitor for treating NDM-1 producing strain infection. In our research, we designed ten oligopeptides, tested IC50 values against NDM-1 enzyme, determined the MIC values of synergistic antibacterial effect and explored the binding model. We found that the oligopeptides 2 Cys-Phe and 5 Cys-Asp respectively presented IC50 values of 113 μM and 68 μM and also displayed favorable synergistic effects of the inhibitors in combination with ertapenem against genetic engineering-host E. coli BL21 DE3-pET30a-NDM-1 and a clinical isolate of P. aeruginosa with blaNDM-1. Flexible docking and partial charge study suggested the interaction between oligopeptide and NDM-1. Three types of action effects, hydrogen bond, electrostatic effect and π-π interaction, contributed to the inhibitory activities.

Author: Bingzheng Shen, Chengliang Zhu, Xiang Gao, Gang Liu, Jinchun Song , Yan Yu

Source: http://plos.srce.hr/


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