Structural Analysis of the Activation of Ribavirin Analogs by NDP Kinase: Comparison with Other Ribavirin Targets
作者:Sarah Gallois-Montbrun、Yuxing Chen、Hélène Dutartre、Magali Sophys、Solange Morera、Catherine Guerreiro、Benoit Schneider、Laurence Mulard、Joël Janin、Michel Veron、Dominique Deville-Bonne、Bruno Canard
DOI:10.1124/mol.63.3.538
日期:2003.3.1
triphosphate analogs modified on the ribose moiety were synthesized and tested in vitro on the RNA polymerases of HCV, phage T7, and HIV-1 reverse transcriptase. Modified nucleotides with 2'-deoxy, 3'-deoxy, 2',3'-dideoxy, 2',3'-dideoxy-2',3'-dehydro, and 2',3'-epoxy-ribose inhibited the HCV enzyme but not the other two polymerases. They were also analyzed as substrates for nucleoside diphosphate (NDP)
用于抗丙型肝炎病毒(HCV)的利巴韦林可能对其他病毒有效,但具有很高的细胞毒性。合成了在核糖部分修饰的几种利巴韦林三磷酸类似物,并在HCV,噬菌体T7和HIV-1逆转录酶的RNA聚合酶上进行了体外测试。具有2'-脱氧,3'-脱氧,2',3'-二脱氧,2',3'-二脱氧-2',3'-脱氢和2',3'-环氧-核糖的修饰核苷酸抑制HCV酶,而不是其他两种聚合酶。还分析了它们作为核苷二磷酸(NDP)激酶的底物,该酶负责细胞激活抗病毒核苷类似物的最后一步。测定了与三磷酸利巴韦林复合的NDP激酶的X射线结构。它表明,尽管碱基被修饰,但类似物仍可作为正常底物结合,并证实了3'-羟基在磷酸化反应中的关键作用。3'-羟基是抑制HCV聚合酶RNA合成的起始步骤所必需的,并且必须存在两个糖羟基以抑制延伸。2'脱氧利巴韦林是唯一有效的抗HCV聚合酶的衍生物,并被NDP激酶正确激活。