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Publication Abstract from PubMed

PTP-1B represents an attractive target for the treatment of type 2 diabetes and obesity. Given the role that protein phosphatases play in the regulation of many biologically relevant processes, inhibitors against PTP-1B must be not only potent, but also selective. It has been extremely difficult to synthesize inhibitors that are selective over the highly homologous TCPTP. We have successfully exploited the conservative Leu119 to Val substitution between the two enzymes to synthesize a PTP-1B inhibitor that is an order of magnitude more selective over TCPTP. Structural analyses of PTP-1B/inhibitor complexes show a conformation-assisted inhibition mechanism as the basis for selectivity. Such an inhibitory mechanism may be applicable to other homologous enzymes.

Conformation-assisted inhibition of protein-tyrosine phosphatase-1B elicits inhibitor selectivity over T-cell protein-tyrosine phosphatase.,Asante-Appiah E, Patel S, Desponts C, Taylor JM, Lau C, Dufresne C, Therien M, Friesen R, Becker JW, Leblanc Y, Kennedy BP, Scapin G J Biol Chem. 2006 Mar 24;281(12):8010-5. Epub 2006 Jan 6. PMID:16407290^[1]

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