作者:John R. Proudfoot、Rajashehar Betageri、Mario Cardozo、Thomas A. Gilmore、Susan Glynn、Eugene R. Hickey、Scott Jakes、Alisa Kabcenell、Thomas M. Kirrane、Annette K. Tibolla、Susan Lukas、Usha R. Patel、Rajiv Sharma、Mehran Yazdanian、Neil Moss、Pierre L. Beaulieu、Dale R. Cameron、Jean-Marie Ferland、Jean Gauthier、James Gillard、Vida Gorys、Martin Poirier、Jean Rancourt、Dominik Wernic、Montse Llinas-Brunet
DOI:10.1021/jm000446q
日期:2001.7.1
p561ck is a member of the src family of tyrosine kinases and plays a critical role in the signal transduction events that lead to T cell activation. Ligands for the p561ck SH2 domain have the potential to disrupt the interaction of p561ck with its substrates and derail the signaling cascade that leads to the production of cytokines such as interleukin-2. Starting from the quintuply charged (at physiological pH) phosphorylated tetrapeptide, AcpYEEI, we recently disclosed (J. Med. Chem. 1999, 42, 722 and J. Med. Chem. 1999, 42, 1757) the design of the modified dipeptide 3, which carries just two charges at physiological pH. Here we present the elaboration of 3 to the nonpeptidic, monocharged compound, 9S. This molecule displays good binding affinity for the p561ck SH2 domain (K-d 1 muM) and good cell permeation, and this combination of properties allowed us to demonstrate clear-cut inhibitory effects on a very early event in T cell activation, namely calcium mobilization.