Fragment-based Discovery of a Small-Molecule Protein Kinase C-iota Inhibitor Binding Post-kinase Domain Residues
作者:Jacek Kwiatkowski、Nithya Baburajendran、Anders Poulsen、Boping Liu、Doris Hui Ying Tee、Yun Xuan Wong、Zhi Ying Poh、Esther HQ Ong、Nurul Dinie、Joseph Cherian、Anna Elisabet Jansson、Jeffrey Hill、Thomas H. Keller、Alvin W. Hung
DOI:10.1021/acsmedchemlett.8b00546
日期:2019.3.14
pyridine fragment weakly inhibiting PKC-ι with IC50 = 424 μM. Driven by structure–activity relationships and guided by docking hypothesis, the weakly bound fragment was eventually optimized into a potent inhibitor of PKC-ι (IC50= 270 nM). Through the course of the optimization, an intermediate compound was crystallized with the protein, and careful analysis of the X-ray crystal structure revealed a unique
非典型蛋白激酶C-iota(PKC-1)酶与多种癌症有关,并且已被提出作为开发抗癌疗法的有吸引力的靶标。高浓度生化筛选鉴定出吡啶片段弱抑制PKC-1,IC 50 = 424μM。在结构-活性关系的驱动下,在对接假设的指导下,弱结合的片段最终被优化为有效的PKC-1抑制剂(IC 50 = 270 nM)。在优化过程中,中间体化合物与蛋白质一起结晶,并且仔细分析X射线晶体结构揭示了涉及PKC-1的激酶后结构域(C末端尾部)的独特结合模式。