作者:Christoph A. Briehn、Philipp Weyermann、Peter B. Dervan
DOI:10.1002/chem.200204689
日期:2003.5.9
acids were synthesized and incorporated into DNA binding polyamides, comprised of N-methyl pyrrole and N-methyl imidazole amino acids, by means of solid-phase synthesis on an oxime resin. These hairpin polyamides were designed to determine the DNA recognition profile of a side-by-side benzimidazole/imidazole pair for the designated six base pair recognition sequence. Equilibrium association constants
通过在肟上进行固相合成,合成了Boc保护的苯并咪唑-吡咯,苯并咪唑-咪唑和苯并咪唑-甲氧基吡咯氨基酸,并将其掺入由N-甲基吡咯和N-甲基咪唑氨基酸组成的DNA结合聚酰胺中。树脂。这些发夹聚酰胺被设计用于确定指定的六个碱基对识别序列的并排苯并咪唑/咪唑对的DNA识别谱。通过对DNA片段进行定量DNase I足迹滴定,在识别序列的六个碱基对位置中的两个碱基对位置确定聚酰胺-DNA复合物的平衡缔合常数,每个片段均包含匹配的碱基对和单个碱基对错配的结合位点。结果表明,苯并咪唑-杂环砌块可以取代吡咯-吡咯,吡咯-咪唑和吡咯-羟基吡咯构建体,同时保留相对位点特异性和亚纳摩尔匹配位点亲和力。含苯并咪唑的发夹状聚酰胺代表一类新型的DNA结合配体,其特征在于可调节的靶标识别序列,并结合了苯并咪唑型DNA小沟结合剂的良好特性。