Species- or isozyme-specific enzyme inhibitors. 9. Selective effects in inhibitions of rat pyruvate kinase isozymes by adenosine 5'-diphosphate derivatives
作者:Ton T. Hai、Masanobu Abo、Alexander Hampton
DOI:10.1021/jm00352a017
日期:1982.10
have been synthesized and evaluated as substrates and inhibitors of the liver (L), muscle (M), and kidney (K) isozymes of rat pyruvate kinase (PK). Inhibitory potencies of the compounds were expressed as KM (ADP)/Ki or as KM (ADP)/KM when no Ki value was available. Nine of 14 ADP derivatives exhibited differential inhibitions. The M and K isozymes, which cross-react immunologically with each other but
已合成了在8个位置中的任何一个位置具有1-4个原子的取代基的5'-二磷酸腺苷衍生物(ADP),并被评估为肝脏(L),肌肉(M)和肾脏(K)同功酶的底物和抑制剂大鼠丙酮酸激酶(PK)的作用。当没有Ki值可用时,化合物的抑制能力表示为KM(ADP)/ Ki或KM(ADP)/ KM。14种ADP衍生物中有9种表现出不同的抑制作用。14种衍生物中的5种对M和K同工酶进行免疫交叉反应,但不与L形式交叉反应。PK-K被两种衍生物优先抑制,PK-L被三种衍生物抑制,PK-M被两种衍生物抑制。在最有选择性和/或最有效的抑制剂中,有3'-OMe-ADP [KM(ADP)/ Ki = 0.07,PK-K;抑制力,K / M / L,7.6:6.0:1],N6-Me,N6-(CH2)4N(Me)COMe-ADP(预先制备)[KM(ADP)/ KM = 0.43(PK-L; 抑制力,L / K / M,3:2:1]和8-NHEt-ADP