Species- or isozyme-specific enzyme inhibitors. 7. Selective effects in inhibitions of rat adenylate kinase isozymes by adenosine 5'-phosphate derivatives
作者:Ton T. Hai、Donald Picker、Masanobu Abo、Alexander Hampton
DOI:10.1021/jm00349a008
日期:1982.7
Monosubstituted derivatives of adenosine 5'-phosphate (AMP) with substituents of 1-3 atoms or group replacements at any of 11 positions have been synthesized and examined as substrates and inhibitors of the rat muscle adenylate kinase isozyme (AK-M), and the rat AK II and III isozymes predominant in poorly differentiated hepatoma tissue and normal liver tissue, respectively. Inhibition indexes of the
合成了腺苷5'-磷酸(AMP)在11个位置上具有1-3个原子的取代基或基团取代基的单取代衍生物,并作为大鼠肌肉腺苷酸激酶同工酶(AK-M)的底物和抑制剂进行了研究,并且大鼠AK II和III同工酶分别在低分化肝癌组织和正常肝组织中占优势。对于竞争性抑制,化合物的抑制指数表示为KM(AMP)/ Ki,当仅有KM时,表示为KM(AMP)/ KM。N(1),N6或C(8)或可电离的磷酸氧上的取代基将抑制作用降低到可测量的水平以下; 2'-deoxy-AMP和5'-腺苷对三种同工酶均具有相同的抑制指数。在C(2),O(2'),O(3'),C(4'),C(5')或O(5' )对AK-M的抑制指数高于对AK II或III的抑制指数,对AK II和III的抑制指数相同或相似。最有效和/或选择性的抑制剂是2-NHMe-AMP(AK-M指数为0.2; AK-M / AK III指数比为9.1),2'-O-Me-AMP(AK-M指数)