5-phenylthioacyclouridine: a potent and specific inhibitor of uridine phosphorylase
作者:Mahmoud H el Kouni、Naganna M Goudgaon、Mohammad Rafeeq、Omar N Al Safarjalani、Raymond F Schinazi、Fardos N.M Naguib
DOI:10.1016/s0006-2952(00)00410-x
日期:2000.9
synthesized as a highly specific and potent inhibitor of uridine phosphorylase (UrdPase, EC 2.4.2.3). PTAU has inhibition constant (K(is)) values of 248 and 353 nM towards UrdPase from mouse and human livers, respectively. PTAU was neither an inhibitor nor a substrate for thymidine phosphorylase (EC 2.4.2.4), uridine-cytidine kinase (EC 2. 7.1.48), thymidine kinase (EC 2.7.1.21), dihydrouracil dehydrogenase
合成了5-苯基硫代阿环尿苷(PTAU或1-[((2-羟基乙氧基)甲基] -5-苯基硫尿嘧啶)作为尿苷磷酸化酶的高度特异性和有效抑制剂(UrdPase,EC 2.4.2.3)。PTAU对来自小鼠和人类肝脏的UrdPase的抑制常数(K(is))分别为248和353 nM。PTAU既不是胸苷磷酸化酶(EC 2.4.2.4),尿苷-胞苷激酶(EC 2. 7.1.48),胸苷激酶(EC 2.7.1.21),二氢尿嘧啶脱氢酶(EC 1.3.1.2)的抑制剂也不是底物磷酸核糖基转移酶(EC 2.4.2.10)或orotidine 5'-单磷酸脱羧酶(EC 4.1.2.23),这些酶可利用UrdPase的底物(尿苷或胸苷)或产物(尿嘧啶或胸腺嘧啶)。还合成了5-甲苯基硫尿嘧啶的不同异构体,并作为UrdPase的抑制剂进行了测试。作为UrdPase抑制剂,间位取代的异构体比对位或邻位取代的异构体的效力