A series of cationic porphyrins carrying 1–3 meso-N-pyridinium groups has been synthesised, and their binding to G-quadruplex DNA has been explored by surface plasmon resonance (SPR) and circular dichroism spectroscopy. Two trans substituents appear to be sufficient for tight binding; preferential binding to the anti-parallel intramolecular human telomeric DNA was observed for the A2trans and A3 porphyrins. The A2trans is able to induce the formation of an anti-parallel G-quadruplex in a K+ free solution, mimicking the effect of a molecular chaperone.
我们合成了一系列带有 1-3 个介-N-
吡啶鎓基团的阳离子
卟啉,并通过表面等离子体共振(
SPR)和圆二色光谱法研究了它们与 G 型四链 DNA 的结合情况。两个反式取代基似乎足以实现紧密结合;观察到 A2trans 和 A3 两种
卟啉优先与反平行的分子内人类端粒 DNA 结合。A2trans 能够在不含 K+ 的溶液中诱导形成反平行的 G-四联体,模拟分子伴侣的作用。