Discovery and Optimization of 1,3,5-Trisubstituted Pyrazolines as Potent and Highly Selective Allosteric Inhibitors of Protein Kinase C-ζ
作者:Mohammad Abdel-Halim、Britta Diesel、Alexandra K. Kiemer、Ashraf H. Abadi、Rolf W. Hartmann、Matthias Engel
DOI:10.1021/jm500521n
日期:2014.8.14
kinase C, PKCζ, might be a therapeutic target in pulmonary and hepatic inflammatory diseases. However, targeting the highly conserved ATP-binding pocket in the catalytic domain held little promise to achieve selective inhibition. In the present study, we introduce 1,3,5-trisubstituted pyrazolines as potent and selective allosteric PKCζ inhibitors. The rigid scaffold offered many sites for modification
越来越多的证据表明,非典型蛋白激酶C(PKCζ)可能是肺和肝炎性疾病的治疗靶标。但是,靶向催化结构域中高度保守的ATP结合口袋对实现选择性抑制几乎没有希望。在本研究中,我们介绍了1,3,5-三取代吡唑啉作为有效的和选择性的变构PKCζ抑制剂。刚性支架提供了许多修饰位点,所有这些位点都可以作为改善活性的热点,并形成了清晰的结构-活性关系。通过报道基因测定,转染测定和Western印迹证实了PKCζ在细胞中的靶向性。对PKCζPIF口袋突变体的无细胞和细胞活性大大降低,表明抑制剂最有可能与激酶催化域上的PIF口袋结合。因此,使用刚性化策略并通过建立和优化与结合位点的多种分子相互作用,我们能够显着提高先前报道的PKCζ抑制剂的效力。