New Nucleotide-Competitive Non-Nucleoside Inhibitors of Terminal Deoxynucleotidyl Transferase: Discovery, Characterization, and Crystal Structure in Complex with the Target
作者:Roberta Costi、Giuliana Cuzzucoli Crucitti、Luca Pescatori、Antonella Messore、Luigi Scipione、Silvano Tortorella、Alessandra Amoroso、Emmanuele Crespan、Pietro Campiglia、Bruno Maresca、Amalia Porta、Ilaria Granata、Ettore Novellino、Jérôme Gouge、Marc Delarue、Giovanni Maga、Roberto Di Santo
DOI:10.1021/jm4010187
日期:2013.9.26
Terminal deoxynucletidyl transferase (TdT) is overexpressed in some cancer types, where it might compete with pol μ during the mutagenic repair of double strand breaks (DSBs) through the nonhomologous end joining (NHEJ) pathway. Here we report the discovery and characterization of pyrrolyl and indolyl diketo acids that specifically target TdT and behave as nucleotide-competitive inhibitors. These compounds
末端脱氧核糖核酸转移酶(TdT)在某些类型的癌症中过表达,在通过非同源末端连接(NHEJ)途径诱变修复双链断裂(DSB)的过程中,末端脱氧核糖核酸转移酶可能与polμ竞争。在这里我们报告发现和表征的吡咯基和吲哚基二酮酸,专门针对TdT和表现为核苷酸竞争性抑制剂。与HeLa细胞相比,这些化合物对MOLT-4具有选择性毒性,而HeLa细胞与TdT的体外选择性密切相关。通过与TdT共结晶确定了这两种抑制剂的结合位点,从而解释了为什么这些化合物是脱氧核苷酸三磷酸(dNTP)的竞争性抑制剂。此外,由于观察到的苯基取代基的双重定位,