Rational Design of Sequence-Specific DNA Alkylating Agents Based on Duocarmycin A and Pyrrole−Imidazole Hairpin Polyamides
作者:Zhi-Fu Tao、Tsuyoshi Fujiwara、Isao Saito、Hiroshi Sugiyama
DOI:10.1021/ja983398w
日期:1999.6.1
Synthesis of novel conjugates between segment A of Duocarmycin A (Du) and N-methylimidazole (Im)−N-methylpyrrole (Py) hairpin polyamides and their DNA alkylation are described. The conjugates PyPyPyγImPyPyDu (8a) and ImPyPyγImPyPyDu (8b) were designed to alkylate the target sequences (A/T)G(A/T)2N(A/G) and (A/T)G(A/T)CN(A/G), respectively, according to Dervan's ring-pairing rule. High-resolution denaturing
描述了 Duocarmycin A (Du) 的 A 段与 N-甲基咪唑 (Im)-N-甲基吡咯 (Py) 发夹聚酰胺之间的新型偶联物的合成及其 DNA 烷基化。共轭物 PyPyPyγImPyPyDu (8a) 和 ImPyPyγImPyPyDu (8b) 设计用于将目标序列 (A/T)G(A/T)2N(A/G) 和 (A/T)G(A/T)CN(A) 烷基化/G),分别根据 Dervan 的环配对规则。高分辨率变性凝胶电泳表明,8a 仅将 5'-TGTAAAA-3' 的 A 烷基化了约 400 bp DNA 片段。类似地,8b 的烷基化仅发生在 5'-AGTCAGA-3' 序列的 G 处,在纳摩尔浓度下有效。为了更好地了解这些偶联物烷基化 DNA 的结构,研究了非自我互补双链体十核苷酸 ODN1 和 ODN2 的烷基化。