文献类型：期刊文献

英文题名：Insights into the synergistic mechanism of target resistance: A case study of N. lugens RDL-GABA receptors and fipronil

作者：Li, Ting[1];Zhou, Cong[1];Zheng, Nan[1];Yang, Hongbin[2];Kuang, Guanglin[2];Shao, Xusheng[1];Li, Zhong[1];Cheng, Jiagao[1,2]

机构：[1]East China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab Chem Biol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab New Drug Design, Shanghai 200237, Peoples R China

年份：2020

卷号：265

外文期刊名：BIOPHYSICAL CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000566472600006)】；

基金：We thank for the financial supports from National Natural Science Foundation of China (21977030, 21572059), the National Key Research and Development Plan (2017YFD0200500), the Innovation Program of Shanghai Municipal Education Commission (201701070002E00037), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Resistance; RDL-GABA receptor; Fipronil; Molecular dynamics simulation; Homology modelling

摘要：It is known that a single mutation exerts moderate resistance to pesticide, while double mutations (DM) cause severe resistance problem through synergistic effect, and even result in failure application of pesticides. However, little is known about how double mutations would synergistically cause much high resistance level. In this work, computational studies were performed on the interaction of fipronil with N. lugens RDL-GABA receptors, to see how single and double mutations changed receptor structure properties and then conferred distinct resistance levels. The A2'S mutation displayed relative weak influence on receptor structure properties. The R0'Q mutation, which has not been detected in the absence of A2'S, however could deeply alter the electrostatic potential around the inner pore region and significantly narrow the bottom region around -2'Pro. For the DM system, the synergistic effect of two mutations lead to similar pore diameters to the WT system, except for the slightly reduced middle part. Docking study and binding free energy calculation revealed that fipronil displayed binding potencies in the order of WT > A2'S > R0'Q > DM systems, coinciding well with the reported fipronil sensitivity trends and resistance levels.