Mechanism-based inhibitors of prostaglandin .omega.-hydroxylase: (R)- and (S)-12-hydroxy-16-heptadecynoic acid and 2,2-dimethyl-12-hydroxy-16-heptadecynoic acid
作者:Alain Burger、Joan E. Clark、Masazumi Nishimoto、A. Scott Muerhoff、Bettie Sue Siler Masters、Paul R. Ortiz de Montellano
DOI:10.1021/jm00062a014
日期:1993.5
cytochrome P450 enzyme that catalyzes the omega-hydroxylation of prostaglandins [Muerhoff, A. S.; Williams, D. E.; Reich, N. O.; CaJacob, C. A.; Ortiz de Montellano, P. R.; Masters, B. S. S. J. Biol. Chem. 1989, 264, 749-756]. Potent, specific inhibitors of this enzyme are required to explore its physiological role. In a continuing effort to develop such agents, the two enantiomers of 12-hydroxy-16-heptadecynoic
已显示12-羟基-16-庚二酸可选择性地灭活细胞色素P450 4A4,后者是一种肺细胞色素P450酶,可催化前列腺素的ω-羟基化作用[Muerhoff,AS; 威廉姆斯(德国);帝国,不;加利福尼亚CaJacob; Ortiz de Montellano,PR;BSSJ生物学硕士。化学 1989,264,749-756]。需要这种酶的强力特异性抑制剂来探索其生理作用。在不断开发这种试剂的过程中,已经立体定向合成了12-羟基-16-庚二酸的两种对映体,确定了它们的绝对立体化学,并使用了从肺部提纯的细胞色素P450 4A4确定了酶失活对绝对立体化学的依赖性。怀孕的兔子。12S对映异构体的活性大约是其两倍(KI = 1.8 microM,t1 / 2 = 0。7分钟)作为12R对映异构体(KI = 3.6 microM,t1 / 2 = 0.8分钟),但是羟基的手性不是决定前列腺素ω-羟化酶特异