Synthesis and biological activity of a ketomethylene analog of a tripeptide inhibitor of angiotensin converting enzyme
作者:Ronald G. Almquist、Wan-Ru Chao、Marie E. Ellis、Howard L. Johnson
DOI:10.1021/jm00186a020
日期:1980.12
An analogue of a tripeptide inhibitor of angiotensin converting enzyme, Bz-Phe-Gly-Pro, has been synthesized in which the amide bond connecting phenylalanine and glycine has been replaced by a ketomethylene group. This nonpeptide analogue, 20, shows more potent converting enzyme inhibiting activity, I50 = 0.07 microM, than Bz-Phe-Gly-Pro, I50 = 9.4 microM, or than the orally active D-3-mercapto-2-
已经合成了血管紧张素转化酶的三肽抑制剂的类似物Bz-Phe-Gly-Pro,其中连接苯丙氨酸和甘氨酸的酰胺键已被酮亚甲基取代。此非肽类似物20显示比Bz-Phe-Gly-Pro I50 = 9.4 microM或比口服活性D-3-巯基-2-甲基丙酰基-L-更有力的转化酶抑制活性,I50 = 0.07 microM。脯氨酸(卡托普利,1),I50 = 0.30 microM。化合物20的Ki为1.06 X 10(-7),并且竞争性或非竞争性的酶动力学取决于转化酶测定中使用的底物。在抑制血管紧张素I诱导的豚鼠回肠收缩中,20的活性为1的十分之一。