Structure-based design of novel human Pin1 inhibitors (III): Optimizing affinity beyond the phosphate recognition pocket
作者:Chuangxing Guo、Xinjun Hou、Liming Dong、Joseph Marakovits、Samantha Greasley、Eleanor Dagostino、RoseAnn Ferre、M. Catherine Johnson、Paul S. Humphries、Haitao Li、Genevieve D. Paderes、Joseph Piraino、Eugenia Kraynov、Brion W. Murray
DOI:10.1016/j.bmcl.2014.07.044
日期:2014.9
The design of potent Pin1 inhibitors has been challenging because its active site specifically recognizes a phospho-protein epitope. The de novo design of phosphate-based Pin1 inhibitors focusing on the phosphate recognition pocket and the successful replacement of the phosphate group with a carboxylate have been previously reported. The potency of the carboxylate series is now further improved through structure-based optimization of ligand-protein interactions in the proline binding site which exploits the H-bond interactions necessary for Pin1 catalytic function. Further optimization using a focused library approach led to the discovery of low nanomolar non-phosphate small molecular Pin1 inhibitors. Structural modifications designed to improve cell permeability resulted in Pin1 inhibitors with low micromolar anti-proliferative activities against cancer cells. (C) 2014 Elsevier Ltd. All rights reserved.