Department of Biochemistry and Molecular Biology, School of Medicine, Wayne State University, Detroit, MI 48201, USA.
Biochem Biophys Res Commun. 2013 Feb 8;431(2):232-8. doi: 10.1016/j.bbrc.2012.12.127. Epub 2013 Jan 8.
Ritonavir (RTV) is a first generation HIV-1 protease inhibitor with rapidly emerging drug resistance. Mutations at residues 46, 54, 82 and 84 render the HIV-1 protease drug resistant against RTV. We report the crystal structure of multi-drug resistant (MDR) 769 HIV-1 protease (carrying resistant mutations at residues 10, 36, 46, 54, 62, 63, 71, 82, 84 and 90) complexed with RTV and the in vitro enzymatic IC(50) of RTV against MDR HIV-1 protease. The structural and functional studies demonstrate significant drug resistance of MDR HIV-1 protease against RTV, arising from reduced hydrogen bonds and Van der Waals interactions between RTV and MDR HIV-1 protease.
利托那韦(RTV)是一种第一代 HIV-1 蛋白酶抑制剂,其耐药性迅速出现。残基 46、54、82 和 84 处的突变使 HIV-1 蛋白酶对 RTV 产生耐药性。我们报告了携带耐药突变(残基 10、36、46、54、62、63、71、82、84 和 90)的多药耐药(MDR)769 HIV-1 蛋白酶与 RTV 复合物的晶体结构以及 RTV 对 MDR HIV-1 蛋白酶的体外酶抑制常数(IC(50))。结构和功能研究表明,MDR HIV-1 蛋白酶对 RTV 的耐药性显著,这是由于 RTV 与 MDR HIV-1 蛋白酶之间的氢键和范德华相互作用减少所致。