Photoisomerizable DNA Ligands. Spectral and Electrochemical Properties and Base-Pair Selectivity of Binding of Bis[2-(1-alkylpyridinium-4-yl)vinyl]benzene Dyes
作者:Bernard Juskowiak、Mitsuyoshi Ohba、Masao Sato、Shigeori Takenaka、Makoto Takagi、Hiroki Kondo
DOI:10.1246/bcsj.72.265
日期:1999.2
Unexpectedly, nonplanar E,Z isomer also binds to DNA with binding features resembling those of the E,E isomer, though with lower affinity. The interaction of both isomers with a minor groove of [poly(dA-dT)]2 resulted in the formation of more stable complexes compared to the intercalation complexes formed with [poly(dG-dC)]2. Small differences in the binding parameters between planar E,E and non-planar
已经制备并表征了一系列双[2-(烷基吡啶鎓-4-基)乙烯基]苯配体,并通过光谱、流体动力学和生化方法的组合研究了它们与DNA的相互作用。尽管双[2-(1-烷基吡啶鎓-4-基)乙烯基]苯配体通过凹槽结合和嵌入模式与DNA相互作用,但所得复合物具有不同的结合特性,这取决于DNA的性质。出乎意料的是,非平面 E,Z 异构体也以类似于 E,E 异构体的结合特征与 DNA 结合,但亲和力较低。与使用 [poly(dG-dC)]2 形成的嵌入复合物相比,两种异构体与 [poly(dA-dT)]2 小沟的相互作用导致形成更稳定的复合物。平面 E 之间结合参数的微小差异,