作者:Anton Granzhan、Eric Largy、Nicolas Saettel、Marie-Paule Teulade-Fichou
DOI:10.1002/chem.200901989
日期:2010.1.18
the highest selectivity for the TX mismatches, as these macrocycles show no apparent binding to the fully paired DNA. By contrast, other macrocyclic ligands, as well as seven conventional DNA binders, show lesser or no selectivity for the mismatch sites. The study demonstrates that the topology of the ligands plays a crucial role in determining the mismatch‐binding affinity and selectivity of the macrocyclic
通过芳族二醛与脂肪族二胺的一步或两步缩合制备了15个同二聚体和5个异二聚体大环双嵌入剂。值得注意的是,异源二聚体支架是首次合成的。通过热变性和荧光嵌入剂置换实验研究了这些大环与含错配胸腺嘧啶残基(TX)的DNA双链体以及完全配对的对照(TA)的结合。双萘衍生物,特别是2,7-二取代的萘衍生物,对TX错配的选择性最高,因为这些大环与完全配对的DNA没有明显的结合。相比之下,其他大环配体以及7种常规DNA结合剂对错配位点的选择性较小或没有。