Specific and Irreversible Cyclopeptide Inhibitors of Dipeptidyl Peptidase IV Activity of the T-Cell Activation Antigen CD26
作者:Coralie Nguyen、Julià Blanco、Jean-Paul Mazaleyrat、Bernard Krust、Christian Callebaut、Etienne Jacotot、Ara G. Hovanessian、Michel Wakselman
DOI:10.1021/jm970640l
日期:1998.6.1
lysine in the P2 position, which allows the closing of the cycle on its side chain. These molecules show a free N-terminus, necessary for binding to the CD26 catalytic site, and a latent quinoniminium methide electrophile, responsible for inactivation. Treatment of c[alphaZ-Lys-Pro-Aba-(6-CH2-OC6H5)-Glyn], obtained by peptide synthesis in solution, with R2S/TFA simutaneously cleaved the Z protecting group
CD26的二肽基肽酶IV(DPP IV)活性的特征在于其脯氨酸后裂解能力,该能力在生物过程中起着重要但尚未理解的作用。在这里,我们描述了该酶的特异性和不可逆抑制剂的新家族。考虑到DPP IV对P2-P1>-P1'裂解的底物特异性,我们设计并合成了环肽c [(alphaH2N +)-Lys-Pro-Aba-(6-CH2-S + R2)-Glyn] 2TFA-(Aba = 3-氨基苯甲酸,R =烷基)在P1位置具有脯氨酸,在P2位置具有赖氨酸,从而可以封闭侧链上的环。这些分子显示出一个自由的N端(对与CD26催化位点结合必不可少),以及一个潜在的灭活的甲基喹啉min亲电体。c [alphaZ-Lys-Pro-Aba-(6-CH2-OC6H5)-Glyn]的治疗,通过在溶液中通过肽合成获得的产物,与R2S / TFA同时裂解Z保护基和苯基醚官能团,并生成一系列环肽sulf盐。这些环肽迅速且不可逆地抑制CD26的DPP