氮芥诱导的 DNA 链间交联的共价结构:双链序列 5'-d(GNC) 上脱氧鸟苷残基的 N7-to-N7 连接
摘要:
使用合成的寡脱氧核糖核苷酸双链体确定了氯乙胺 [双 (2-氯乙基) 甲胺,氮芥] 与双链体 DNA 的链间交联反应的主要产物的共价结构。通过变性聚丙烯酰胺凝胶电泳 (DPAGE) 对交联产物的迁移率进行分析,揭示了提供螺旋内、链间交联的反应。这些交联在脱氧鸟苷残基处暴露于哌啶水溶液时被裂解,表明脱氧鸟苷残基的 N 7 是 DNA 上的烷基化位点
Alkylation of DNA by the Nitrogen Mustard Bis-(2-chloroethyl)methylamine
作者:Martin R. Osborne、Derry E. V. Wilman、Philip D. Lawley
DOI:10.1021/tx00044a018
日期:1995.3
Alkylation of DNA by the nitrogen mustard bis(2-chloroethyl)methylamine (mechlorethamine; HN2) gave four principal products, derived by mono-alkylation of guanine at N-7 and adenine at N-3 and by cross-linking of guanine to guanine or guanine to adenine at these positions. These products were isolated by hydrolysis from DNA at neutral pH, followed by ion-exchange chromatography on SP-Sephadex and reversed phase chromatography on ODS. They were characterized by identification with products from the reaction of nitrogen mustard with adenine or deoxyguanylic acid, and by their UV, mass, and proton magnetic resonance spectra.