Molecular Design of a Pyrrole–Imidazole Hairpin Polyamides for Effective DNA Alkylation
作者:Toshikazu Bando、Akihiko Narita、Isao Saito、Hiroshi Sugiyama
DOI:10.1002/1521-3765(20021018)8:20<4781::aid-chem4781>3.0.co;2-j
日期:2002.10.18
clear contrast, the hairpin CPI conjugate 13, which differs from compound 1 in that it lacks one Py unit and possesses a vinyl linker, alkylated the A of 5'-AGTCAG-3' (site 3) efficiently at nanomolar concentrations. Alkylation by compound 14, which has a vinyl linker, occurred at the A of 5'-AGTCCA-3' (site 6) and at several minor alkylation sites, including mismatch alkylation at A of 5'-TCACAA-3'
通过具有450个碱基对(bp)的高分辨率变性凝胶电泳,合成了新的发夹聚酰胺-CPI(CPI =环丙基吡咯并吲哚)化合物12-14,并且与先前制备的发夹聚酰胺化合物1相比,它们的DNA烷基化活性更高。 DNA片段并通过HPLC产物分析合成的十核苷酸。与我们先前的结果一致,化合物1的烷基化主要发生在序列5'-AGTCAG-3'(位点3)的G部分。但是,化合物12的化合物1的烷基化部分的结构被杜卡霉素A DU-86(CPI)的链段A取代的化合物12没有显示出任何DNA烷基化活性。与之形成鲜明对比的是,发夹CPI共轭物13与化合物1的不同之处在于,它缺少一个Py单元并具有乙烯基接头,将5'的A烷基化 -AGTCAG-3'(部位3)在纳摩尔浓度下有效。具有乙烯基连接基的化合物14的烷基化发生在5'-AGTCCA-3'的A(位点6)和几个次要的烷基化位点,包括5'-TCACAA-3'的A的错配烷基化(位点2)