Reversible and irreversible inhibitory activity of succinic and maleic acid derivatives on acetylcholinesterase
作者:J. Trujillo-Ferrara、Iván Vázquez、Judith Espinosa、Rosa Santillan、Norberto Farfán、Herbert Höpfl
DOI:10.1016/s0928-0987(03)00023-x
日期:2003.4
against the time of incubation at several different inhibitor concentrations were determined. The K(i) for reversible competitive inhibitors was determined. For irreversible inhibitors the K(i) for the dissociation constant of the enzyme-inhibitor complex at the beginning of the recognition process was also determined as well as the inactivation constant of the enzyme-inhibitor adduct formation k(+2) and
芳基琥珀酸和马来酸衍生物是体外牛乙酰胆碱酯酶的有效抑制剂。琥珀酸氨基苯酚衍生物1b-e和2b-d充当乙酰胆碱酯酶的可逆抑制剂,而马来酸氨基苯酚衍生物3b-d和4c-e充当胆碱亚位定向的不可逆抑制剂,通过在有烯酮存在下进行透析检测。确定了在几种不同抑制剂浓度下绘制的乙酰胆碱水解速度对数与孵育时间之间的线性关系。确定了可逆竞争抑制剂的K(i)。对于不可逆抑制剂,还确定了在识别过程开始时酶抑制剂复合物的解离常数K(i)以及酶抑制剂加合物形成k(+2)和双分子抑制剂的失活常数常数k(i)被氨基酚衍生物3b-d和4c-e抑制乙酰胆碱酯酶。对于这两个家族,本研究的结论可总结如下:(a)芳族部分在识别活性位点中起关键作用;(b)对于可逆抑制剂,当酯功能取代羟基片段时,亲和力有了重要的提高;(c)酚羟基与氮之间的距离至关重要,因为这种抑制作用是邻位<