A small library of peptide amides was designed to profile the cathepsin L active site. Within the cathepsin family of cysteine proteases, the first round of selection was on cathepsin L and cathepsin B, and then selected hits were further evaluated for binding to cathepsin K and cathepsin S. Five highly selective sequences with submicromolar affinities towards cathepsin L were identified. An acyloxymethyl ketone warhead was then attached to these sequences. Although these original irreversible inhibitors inactivate cathepsin L, it appears that the nature of the warhead drastically impact the selectivity profile of the resulting covalent inhibitors. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of tyrosine modified analogues of the α4β7 integrin inhibitor biotin-R8ERY
作者:Stefanie Papst、Anaïs F.M. Noisier、Margaret A. Brimble、Yi Yang、Geoffrey W. Krissansen
DOI:10.1016/j.bmc.2012.07.010
日期:2012.9
inflammatory bowel disease, type 1 diabetes and multiple sclerosis. The synthesis of a small library of cell-permeable β7 integrin inhibitors based on the peptide biotin-R8ERY is reported, in which the tyrosine residue has been modified by using the Suzuki-Miyaura cross-coupling reaction. The synthesised peptidomimetics were evaluated in a cell adhesion assay and shown to inhibit Mn2+-activated adhesion