Structure-Based Optimization of Pyridoxal 5′-Phosphate-Dependent Transaminase Enzyme (BioA) Inhibitors that Target Biotin Biosynthesis in <i>Mycobacterium tuberculosis</i>
作者:Feng Liu、Surendra Dawadi、Kimberly M. Maize、Ran Dai、Sae Woong Park、Dirk Schnappinger、Barry C. Finzel、Courtney C. Aldrich
DOI:10.1021/acs.jmedchem.7b00189
日期:2017.7.13
relationships (SAR) through the design, synthesis, and biological evaluation of a systematic series of analogues of the original hit using a structure-based drug design strategy, which was enabled by cocrystallization of several analogues with BioA. To confirm target engagement and discern analogues with off-target activity, each compound was evaluated against wild-type (WT) Mtb in biotin-free and -containing
吡咯醛5'-磷酸(PLP)依赖性转氨酶BioA催化结核分枝杆菌(Mtb)中生物素生物合成的第二步,并且是细菌存活和体内持久性所必需的酶。含有N-芳基,N的有前途的BioA抑制剂6以前已通过基于靶标的全细胞筛选确定了'-苯甲酰基哌嗪支架。在这里,我们使用基于结构的药物设计策略,通过设计,合成和生物学评估原始命中的系统类似物系列,探索结构与活性之间的关系(SAR),该策略是通过将几种类似物与BioA共结晶而实现的。为了确认靶标参与并辨别具有脱靶活性的类似物,评估了每种化合物在无生物素和含培养基的培养基中以及在表达过少和过表达的BioA Mtb菌株中对野生型(WT)Mtb的能力。构象受限的导数36成为最强的K D类似物为76nm针对的bioA和1.7μM(0.6微克/毫升)对的最小抑制浓度的Mtb在无生物素培养基。