A chalcone derivative binds a putative allosteric site of YopH: Inhibition of a virulence factor of Yersinia
作者:Ana C.A. de Souza、Mattia Mori、Larissa Sens、Ruth F. Rocha、Tiago Tizziani、Luiz F.S. de Souza、Louise Domeneghini Chiaradia-Delatorre、Maurizio Botta、Ricardo J. Nunes、Hernán Terenzi、Angela C.O. Menegatti
DOI:10.1016/j.bmcl.2020.127350
日期:2020.8
Identification of allosteric inhibitors of PTPs has attracted great interest as a new strategy to overcome the challenge of discover potent and selective molecules for therapeutic intervention. YopH is a virulence factor of the genus Yersinia , validated as an antimicrobial target. The finding of a second substrate binding site in YopH has revealed a putative allosteric site that could be further exploited. Novel chalcone compounds that inhibit PTPs activity were designed and synthesized. Compound 3j was the most potent inhibitor, interestingly, with different mechanisms of inhibition for the panel of enzymes evaluated. Further, our results showed that com- pound 3j is an irreversible non-competitive inhibitor of YopH that binds to a site different than the catalytic site, but close to the well-known second binding site of YopH.
Synthesis and structure-activity relationship of new chalcone linked 5-phenyl-3-isoxazolecarboxylic acid methyl esters potentially active against drug resistant Mycobacterium tuberculosis
agents active against emerging drug-resistant Mycobacterium tuberculosis and to counter the long treatment protocol of existing drugs, herein we present synthesis and biological evaluation of a new series of 5-phenyl-3-isoxazolecarboxylic acidmethyl ester-chalcone hybrids. Among 35 synthesized compounds, 32 analogues displayed potent in-vitro activity against Mycobacterium tuberculosis H37Rv with MIC