Optimization of a binding fragment targeting the “enlarged methionine pocket” leads to potent Trypanosoma brucei methionyl-tRNA synthetase inhibitors
作者:Wenlin Huang、Zhongsheng Zhang、Ranae M. Ranade、J. Robert Gillespie、Ximena Barros-Álvarez、Sharon A. Creason、Sayaka Shibata、Christophe L.M.J. Verlinde、Wim G.J. Hol、Frederick S. Buckner、Erkang Fan
DOI:10.1016/j.bmcl.2017.04.048
日期:2017.6
Potent inhibitors of Trypanosoma brucei methionyl-tRNA synthetase were previously designed using a structure-guided approach. Compounds 1 and 2 were the most active compounds in the cyclic and linear linker series, respectively. To further improve cellular potency, SAR investigation of a binding fragment targeting the "enlarged methionine pocket" (EMP) was performed. The optimization led to the identification
以前使用结构指导方法设计了布鲁氏锥虫蛋氨酸-tRNA合成酶的有效抑制剂。化合物1和2分别是环状和线性接头系列中活性最高的化合物。为了进一步提高细胞效力,对靶向“蛋氨酸袋增大”(EMP)的结合片段进行了SAR研究。优化导致鉴定出6,8-二氯-四氢喹啉环为结合EMP的有利片段。使用该四氢喹啉片段替换抑制剂2的3,5-二氯苄基(EMP结合片段)得到的化合物13的EC50为4nM。