Structure-Guided Design of Halofuginone Derivatives as ATP-Aided Inhibitors Against Bacterial Prolyl-tRNA Synthetase
作者:Bao Cheng、Zhengjun Cai、Ziqing Luo、Siting Luo、Zhiteng Luo、Yanfang Cheng、Ying Yu、Junsong Guo、Yingchen Ju、Qiong Gu、Jun Xu、Xianxing Jiang、Geng Li、Huihao Zhou
DOI:10.1021/acs.jmedchem.2c01496
日期:2022.12.8
Aminoacyl-tRNA synthetases (aaRSs) are promising antimicrobial targets due to their essential roles in protein translation, and expanding their inhibitory mechanisms will provide new opportunities for drug discovery. We report here that halofuginone (HF), an herb-derived medicine, moderately inhibits prolyl-tRNA synthetases (ProRSs) from various pathogenic bacteria. A cocrystal structure of Staphylococcus
氨酰-tRNA 合成酶 (aaRS) 是很有前途的抗菌靶点,因为它们在蛋白质翻译中起着重要作用,扩展它们的抑制机制将为药物发现提供新的机会。我们在此报告,一种草药衍生药物 halofuginone (HF) 适度抑制来自各种病原菌的脯氨酰-tRNA 合成酶 (ProRSs)。确定了金黄色葡萄球菌ProRS ( Sa ProRS) 与 HF 和 ATP 类似物的共晶结构,这指导了新 HF 类似物的设计。化合物3在 IC 50 = 0.18 μM 和K d = 30.3 nM 时有效抑制Sa ProRS,并在体外显示出抗菌活性,MIC 为 1–4 μg/mL. 细菌对3的耐药性仅以类似于或慢于临床使用的体外抗生素的速度产生。我们的研究表明,HF 的支架和 ATP 辅助抑制机制可应用于细菌 ProRS,并且还为使用细菌 ProRS 作为抗菌靶点提供了化学验证。