Specific Stereoisomeric Conformations Determine the Drug Potency of Cladosporin Scaffold against Malarial Parasite
作者:Pronay Das、Palak Babbar、Nipun Malhotra、Manmohan Sharma、Goraknath R. Jachak、Rajesh G. Gonnade、Dhanasekaran Shanmugam、Karl Harlos、Manickam Yogavel、Amit Sharma、D. Srinivasa Reddy
DOI:10.1021/acs.jmedchem.8b00565
日期:2018.7.12
The dependence of drug potency on diastereomeric configurations is a key facet. Using a novel general divergent synthetic route for a three-chiral center antimalarial natural product cladosporin, we built its complete library of stereoisomers (cladologs) and assessed their inhibitory potential using parasite-, enzyme-, and structure-based assays. We show that potency is manifest via tetrahyropyran
药物效力对非对映异构构型的依赖性是关键方面。使用针对三手性中心抗疟疾天然产物cladosporin的新颖的通用发散性合成路线,我们建立了其完整的立体异构体库(cladologs),并使用基于寄生虫,酶和结构的分析评估了其抑制潜力。我们表明,效力是通过安置在寄生虫赖氨酰tRNA合成酶(KRS)的核糖结合口袋中的四氢吡喃环构象体现的。令人惊讶的是,最高和最差对映异构体之间的药效变化了500倍,KRS-cladolog配合物的结构显示,C3和C10处的改变不利于药效,而C3处的改变则通过谷氨酸332的旋转翻转来感知。抗疟和抗感染药物包含手性中心,