Discovery and Mechanism Study of SARS-CoV-2 3C-like Protease Inhibitors with a New Reactive Group
作者:Pengxuan Ren、Hui Li、Tianqing Nie、Xiaoqin Jian、Changyue Yu、Jian Li、Haixia Su、Xianglei Zhang、Shiwei Li、Xin Yang、Chao Peng、Yue Yin、Leike Zhang、Yechun Xu、Hong Liu、Fang Bai
DOI:10.1021/acs.jmedchem.3c00818
日期:2023.9.14
we identified a potent inhibitor of 3CLpro (3a) that contains a thiocyanate moiety as a novel warhead that can form a covalent bond with Cys145 of the protein. Tandem mass spectrometry (MS/MS) and X-ray crystallography confirmed the mechanism of covalent formation between 3a and the protein in its catalytic pocket. Moreover, several analogues of compound 3a were designed and synthesized. Among them
3CL pro是治疗 COVID-19 的一个有吸引力的靶点。使用支架跳跃策略,我们鉴定了 3CL pro ( 3a )的有效抑制剂,其含有硫氰酸盐部分作为新型弹头,可以与蛋白质的 Cys145 形成共价键。串联质谱 (MS/MS) 和 X 射线晶体学证实了3a与其催化口袋中的蛋白质之间形成共价键的机制。此外,还设计并合成了化合物3a的几种类似物。其中,化合物3h对3CL pro的抑制效果最好,IC 50为0.322 μM,k inact / K i值为1669.34 M –1 s –1,并且对3CL pro对宿主蛋白酶表现出良好的靶点选择性。化合物3c可抑制 Vero E6 细胞中的 SARS-CoV-2 (EC 50 = 2.499 μM),且细胞毒性较低 (CC 50 > 200 μM)。这些研究为未来探索和开发新的 3CL前体抑制剂提供了思路和见解。