Perylene Diimide G-Quadruplex DNA Binding Selectivity is Mediated by Ligand Aggregation
作者:Sean M. Kerwin、Grace Chen、Jonathan T. Kern、Pei Wang Thomas
DOI:10.1016/s0960-894x(01)00775-2
日期:2002.2
N'-disubstituted perylene diimide G-quadruplex DNA ligands, PIPER [N,N'-bis-(2-(1-piperidino)ethyl)-3,4,9,10-perylene tetracarboxylic acid diimide] and Tel01 [N,N'-bis-(3-(4-morpholino)-propyl)-3,4,9,10-perylene tetracarboxylic acid diimide] were studied. Visible absorbance, resonance light scattering, and fluorescence spectroscopy were used to characterize the pH-dependent aggregation of these ligands. The G-quadruplex
两个N,N'-二取代的ylene二酰亚胺G-四链体DNA配体,PIPER [N,N'-双-(2-(1-哌啶子基)乙基)-3,4,9,10-per四羧酸二酰亚胺]和Tel01研究了[N,N′-双-(3-(4-吗啉代)-丙基)-3,4,9,10-per四羧酸二酰亚胺]。可见吸收,共振光散射和荧光光谱用于表征这些配体的pH依赖性聚集。通过吸收光谱法监测的这些配体的G-四链体DNA结合选择性也是pH依赖性的。配体在低pH条件下结合双链体DNA和G-四链体DNA,此时配体不聚集。在较高的pH下,配体大量聚集,表观的G-四链体DNA结合选择性很高。