β-Branched acyclic nucleoside analogues as inhibitors of Plasmodium falciparum dUTPase
作者:Beatriz Baragaña、Orla McCarthy、Paula Sánchez、Cristina Bosch-Navarrete、Marcel Kaiser、Reto Brun、Jean L. Whittingham、Shirley M. Roberts、Xiao-Xiong Zhou、Keith S. Wilson、Nils Gunnar Johansson、Dolores González-Pacanowska、Ian H. Gilbert
DOI:10.1016/j.bmc.2011.02.012
日期:2011.4
We report a series of β-branched acyclic tritylated deoxyuridine analogues as inhibitors of Plasmodium falciparum deoxyuridine-5′-triphosphate nucleotidohydrolase (PfdUTPase), an enzyme involved in nucleotide metabolism that acts as first line of defence against uracil incorporation into DNA. Compounds were assayed against both PfdUTPase and intact parasites showing a correlation between enzyme inhibition
我们报告了一系列β支链的无环三苯甲基化的脱氧尿苷类似物,作为恶性疟原虫脱氧尿苷-5'-三磷酸核苷酸水解酶(Pf dUTPase)的抑制剂,该酶参与核苷酸代谢,作为针对尿嘧啶掺入DNA的第一道防线。针对Pf dUTPase和完整的寄生虫对化合物进行了分析,显示了酶抑制与细胞分析之间的相关性。与先前报道的类似物相比,此处描述的β支链无环尿苷类似物显示出相同或稍高的效价和选择性。最好的抑制剂对Pf的K i为0.5μMdUTPase的选择性大于对应的人类酶的200倍,并且对恶性疟原虫的亚微摩尔生长具有抑制作用(EC 50 0.6μM)。Pf dUTPase与一种抑制剂的复合物的晶体结构表明,该无环衍生物以与先前报道的三苯甲基化环脱氧尿苷衍生物相似的方式与活性位点结合。