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Publication Abstract from PubMed

Individual roles and overlapping functionalities of 12 human caspases during apoptosis and other cellular processes remain poorly resolved primarily due to a lack of chemical tools. Here we present a new selective caspase-3 inhibitor, termed Ac-ATS010-KE, with rapid and irreversible binding kinetics. Relative to previously designed caspase-3-selective molecules that have tremendously abated inhibitory rates and thus limited use in biological settings, the improved kinetics of Ac-ATS010-KE permits its use in a cell-based capacity. We demonstrate that Ac-ATS010-KE prevents apoptosis with comparable efficacy to the general caspase inhibitor Ac-DEVD-KE and surprisingly does so without side-chain methylation. This observation is in contrast to the well-established peptide modification strategy typically employed for improving cellular permeability. Ac-ATS010-KE protects against extrinsic apoptosis, which demonstrates the utility of a thiophene carboxylate leaving group in biological settings, challenges the requisite neutralization of free carboxylic acids to improve cell permeability, and provides a tool-like compound to interrogate the role of caspase-3 in a variety of cellular processes.

Selective and Rapid Cell-Permeable Inhibitor of Human Caspase-3.,Solania A, Gonzalez-Paez GE, Wolan DW ACS Chem Biol. 2019 Nov 15;14(11):2463-2470. doi: 10.1021/acschembio.9b00564., Epub 2019 Aug 1. PMID:31334631^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.