Effects of charge, volume, and surface on binding of inhibitor and substrate moieties to acetylcholinesterase
作者:Saul G. Cohen、S. Bano Chishti、Jerome L. Elkind、Heide Reese
DOI:10.1021/jm00147a033
日期:1985.9
Reversible inhibitors for acetylcholinesterase, AcChE, have been studied. Sterically similar alcohols with tetra-substituted uncharged beta groups, (CH3)3SiCH2CH2OH (I), (CH3)3CCH2CH2OH (IA), and CH3S(O2)CH2CH2OH (VII), bind similarly, KI = 3-9 mM, and each binds similarly to its acetate substrate; cationic analogues, (CH3)3N+CH2CH2OH (IB) and (CH3)2S+CH2CH2OH (II), bind similarly to each other, KI
已经研究了乙酰胆碱酯酶AcChE的可逆抑制剂。具有四取代的不带电β基团的立体相似的醇(CH3)3SiCH2CH2OH(I),(CH3)3CCH2CH2OH(IA)和CH3S(O2)CH2CH2OH(VII)相似地结合,KI = 3-9 mM,每个结合与其醋酸酯底物相似;阳离子类似物(CH3)3N + CH2CH2OH(IB)和(CH3)2S + CH2CH2OH(II)彼此相似地结合,KI = 0.4 mM,类似于其乙酸酯底物的Km值,并且比不带电荷的醇更牢固约1.5kcal / mol。与VII与CH3SO2CH3,II与(CH3)3S +和IB与(CH3)4N +进行比较,尽管疏水性较低,但羟乙基的结合力比甲基更好,约为0.8 kcal / mol。与IA与丁醇相比,两个疏水甲基和两个亲水砜O原子,与VII与2-(甲硫基)乙醇的比较,类似地,将结合增加1.0kcal / mol。(CH