Naphthalene diimide scaffolds with dual reversible and covalent interaction properties towards G-quadruplex
作者:Matteo Nadai、Filippo Doria、Marco Di Antonio、Giovanna Sattin、Luca Germani、Claudia Percivalle、Manlio Palumbo、Sara N. Richter、Mauro Freccero
DOI:10.1016/j.biochi.2011.06.015
日期:2011.8
by substituted naphathalene diimides (NDIs) conjugated to engineered phenol moieties by alkyl-amido spacers with tunable length and conformational mobility. FRET-melting assays, circular dichroism titrations and gel electrophoresis analysis have been carried out to evaluate both reversible stabilization and alkylation of the G-quadruplex. The NDIs conjugated to a quinone methide precursor (NDI-QMP)
G-四链体寡核苷酸的选择性识别和烷基化已通过取代的萘酚二酰亚胺(NDI)通过烷基酰胺间隔基与可调节的长度和构象移动性与工程酚部分偶联而实现。已经进行了FRET-熔解测定,圆二色性滴定和凝胶电泳分析,以评估G-四链体的可逆稳定性和烷基化。通过最短的烷基-氨基间隔基偶联到醌甲基化物前体(NDI-QMP)和苯酚部分的NDI表现出平面且相当刚性的几何形状(通过DFT计算建模)。它们分别是最好的不可逆和可逆G-四链体粘合剂。上述NDI-QMP能够在纳摩尔范围内烷基化端粒G-四链体DNA,并且与单链和双链寡核苷酸相比,对G-四链体的选择性高100-1000倍。该化合物对肺癌细胞系的细胞毒性也最大。