Lipophilic versus hydrogen-bonding effect in P3 on potency and selectivity of valine aspartyl ketones as caspase 3 inhibitors
作者:Christophe Mellon、Reneé Aspiotis、Cameron W. Black、Christopher I. Bayly、Erich L. Grimm、André Giroux、Yongxin Han、Elise Isabel、Daniel J. McKay、Donald W. Nicholson、Dita M. Rasper、Sophie Roy、John Tam、Nancy A. Thornberry、John P. Vaillancourt、Steven Xanthoudakis、Robert Zamboni
DOI:10.1016/j.bmcl.2005.05.116
日期:2005.9
Caspase 3 is a cysteinyl protease that mediates apoptotic cell death. Its inhibition may have an important impact in the treatment of several degenerative diseases. The P, aspartic acid residue is a required element of recognition for this enzyme that was maintained constant along with the adjacent natural valine as the P-2 group. The thiobenzylmethylketone warhead on the aspartate was conveniently handled through solid-phase synthesis allowing modification in the P-3 region that eventually led to simpler derivatives with increased potency against caspase 3. The key to such an effect is the introduction of hydroxyl group alpha to the P3 carbonyl. (c) 2005 Elsevier Ltd. All rights reserved.