A nonhydrolyzable analogue of phosphotyrosine, and related aryloxymethano- and aryloxyethano-phosphonic acids as motifs for inhibition of phosphatases
作者:Subashree Iyer、Jarod M. Younker、Przemyslaw G. Czyryca、Alvan C. Hengge
DOI:10.1016/j.bmcl.2004.09.008
日期:2004.12
Nonhydrolyzable analogues of both stereoisomers of phosphotyrosine, and a series of related aryloxy (or thio) methyl and aryloxy (or thio) ethyl phosphonic acids of the general formula RX-(CH2) -PO3H2 (where X = O or S and n = 1 or 2), have been tested as nonhydrolyzable mimetics of phosphatase substrates. These compounds were tested against a panel of phosphatases (two alkaline phosphatases, a protein-tyrosine phosphatase, and two serine/threonine phosphatases) with different active site motifs. The compounds exhibit competitive inhibition toward all enzymes tested, with the best inhibition expressed toward the Ser/Thr phosphatases. The stereoisomers of the phosphotyrosine analogues exhibited an unexpected difference in their inhibitory properties toward the protein-tyrosine phosphatase from Yersinia. The K-i for the D isomer is 33-fold lower than that of the (L) isomer, and is more than an order of magnitude lower than the reported K, of the substrate L-phosphotyrosine. (C) 2004 Elsevier Ltd. All rights reserved.