5-p-Benzoquinonyl-2'-deoxyuridine 5'-phosphate: a possible mechanism-based inhibitor of thymidylate synthetase
作者:Linda Maggiora、Charles T. C. Chang、Mohamed E. Hasson、Christopher F. Bigge、Mathias P. Mertes
DOI:10.1021/jm00361a016
日期:1983.7
The title compound (1), designed as a suicide inhibitor of thymidylate synthetase, can be prepared by silver(II) oxide oxidative demethylation of the corresponding dimethoxyphenyl derivative. Compound 1 shows time-dependent inactivation of thymidylate synthetase (methotrexate-resistant Lactobacillus casei) and saturation kinetics, and the inactivation is responsive to substrate protection. The inactivation
设计为胸苷酸合成酶的自杀抑制剂的标题化合物(1)可以通过相应的二甲氧基苯基衍生物的氧化银(II)氧化脱甲基来制备。化合物1显示胸苷酸合成酶(耐甲氨蝶呤的干酪乳杆菌)的时间依赖性失活和饱和动力学,该失活对底物保护有反应。在试图去除抑制剂的长时间透析中,失活是不可逆的。失活的速率常数为0.065 s-1;解离常数(Ki)估计为2 microM。将这种失活的动力学与模型硫醇试剂对胸苷酸合成酶活性位点没有亲和力引起的失活进行了比较。