Assessment of Mycobacterium tuberculosis Pantothenate Kinase Vulnerability through Target Knockdown and Mechanistically Diverse Inhibitors
作者:B. K. Kishore Reddy、Sudhir Landge、Sudha Ravishankar、Vikas Patil、Vikas Shinde、Subramanyam Tantry、Manoj Kale、Anandkumar Raichurkar、Sreenivasaiah Menasinakai、Naina Vinay Mudugal、Anisha Ambady、Anirban Ghosh、Ragadeepthi Tunduguru、Parvinder Kaur、Ragini Singh、Naveen Kumar、Sowmya Bharath、Aishwarya Sundaram、Jyothi Bhat、Vasan K. Sambandamurthy、Christofer Björkelid、T. Alwyn Jones、Kaveri Das、Balachandra Bandodkar、Krishnan Malolanarasimhan、Kakoli Mukherjee、Vasanthi Ramachandran
DOI:10.1128/aac.00140-14
日期:2014.6
Pantothenate kinase (PanK) catalyzes the phosphorylation of pantothenate, the first committed and rate-limiting step toward coenzyme A (CoA) biosynthesis. In our earlier reports, we had established that the type I isoform encoded by the coaA gene is an essential pantothenate kinase in Mycobacterium tuberculosis, and this vital information was then exploited to screen large libraries for identification
泛酸激酶 (PanK) 催化泛酸的磷酸化,这是辅酶 A (CoA) 生物合成的第一步和限速步骤。在我们之前的报告中,我们已经确定由 coaA 基因编码的 I 型亚型是结核分枝杆菌中必不可少的泛酸激酶,然后利用这一重要信息来筛选大型文库,以识别机械上不同类别的 PanK 抑制剂。本报告总结了合成和扩展工作,以了解导致优化酶抑制和抗分枝杆菌活性的结构-活性关系。此外,我们报告了两种不同类别的抑制剂的进展,三唑类是 ATP 竞争者,而联芳基乙酸具有混合抑制模式。共结晶研究提供了这些抑制剂与酶结合的证据。这进一步证实了联芳酸对野生型结核分枝杆菌菌株具有 MIC 以及随后在过表达 PanK 的菌株中建立了与 MIC 上升的目标联系。另一方面,ATP 竞争者仅在具有降低的 PanK 表达水平的结核分枝杆菌敲低菌株中具有细胞活性。此外,对结核分枝杆菌 PanK (MtPanK) 敲低菌株进行的体外和体内