Facile synthesis and biological evaluation of a cell-permeable probe to detect redox-regulated proteins
摘要:
We have developed an improved synthesis for the cell-permeable, sulfenic acid probe DAz-1. Using DAz-1, we detect sulfenic acid modi. cations in the cell-cycle regulatory phosphatase Cdc25A. In addition, we show that DAz-1 has superior potency in cells compared to a biotinylated derivative. Collectively, these. findings set the stage for the development of activity-based inhibitors of Cdc25 cell-cycle phosphatases, which are sensitive to the redox state of the active-site cysteine and demonstrate the advantage of bioorthogonal conjugation methods to detect protein sulfenic acids in cells. (C) 2008 Elsevier Ltd. All rights reserved.
Targeted Covalent Probes and Inhibitors of Proteins Containing Redox-Sensitive Cysteines
申请人:THE SCRIPPS RESEARCH INSTITUTE
公开号:US20160195532A1
公开(公告)日:2016-07-07
Covalent, irreversible small-molecule inhibitors that modify the sulfenyl form (i.e., sulfenic acid, RSOH and sulfenamide, RSNR′2) of therapeutically important proteins (particularly kinases and phosphatases) are disclosed, where the compositions include a compound having a substituted aryl or heterocyclic core structure that promotes binding interactions with a specific protein, and a nucleophilic reaction center (carbon, nitrogen, sulfur, or phosphorous) that is capable of forming a covalent bond with a sulfenic acid- or sulfenamide-modified cysteine residue in the protein. Methods for synthesizing these compounds are also disclosed, as well as methods of using them for determining the bioactivity of a chemical composition comprising an active compound toward a specific protein and for determining the potency of an inhibitor against a specific protein.