Inhibitors of Tripeptidyl Peptidase II. 2. Generation of the First Novel Lead Inhibitor of Cholecystokinin-8-Inactivating Peptidase: A Strategy for the Design of Peptidase Inhibitors
作者:C. Robin Ganellin、Paul B. Bishop、Ramesh B. Bambal、Suzanne M. T. Chan、James K. Law、Benoit Marabout、Pratibha Mehta Luthra、Andrew N. J. Moore、Olivier Peschard、Pierre Bourgeat、Christiane Rose、Froylan Vargas、Jean-Charles Schwartz
DOI:10.1021/jm990226g
日期:2000.2.1
fluorimetric assay based on the hydrolysis of the artificial substrate Ala-Ala-Phe-amidomethylcoumarin. A series of di- and tripeptides having various alkyl or aryl side chains was studied to determine the accessible volume for binding and to probe the potential for hydrophobic interactions. From this initial study the tripeptides Ile-Pro-Ile-OH (K(i) = 1 microM) and Ala-Pro-Ala-OH (K(i) = 3 microM) and dipeptide
失活胆囊收缩素8(CCK-8)的肽酶是一种丝氨酸肽酶,已证明是三肽基肽酶II的膜结合同工型(EC 3.4.14.10)。它在Met-Gly键处裂解神经递质CCK-8硫酸盐,得到Asp-Tyr(SO(3)H)-Met-OH + Gly-Trp-Met-Asp-Phe-NH(2)。为了寻找该肽酶的可逆抑制剂,使用基于人工底物Ala-Ala-Phe-酰胺基甲基香豆素水解的荧光分析法来表征酶促结合亚位点。对具有各种烷基或芳基侧链的一系列二肽和三肽进行了研究,以确定可结合的体积并探讨疏水相互作用的可能性。根据这项初步研究,三肽Ile-Pro-Ile-OH(K(i)= 1 microM)和Ala-Pro-Ala-OH(K(i)= 3 microM)和二肽酰胺Val-Nvl-NHBu(K( i)= 3 microM)作为线索出现。这些结构的比较导致Val-Pro-NHBu(K(i)= 0.57 micr