首页> 外文期刊>Chemistry: A European journal >Bifunctional DNA Architectonics: Three-Way Junctions with Sticky Perylene Bisimide Caps and a Central Metal Lock
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Bifunctional DNA Architectonics: Three-Way Junctions with Sticky Perylene Bisimide Caps and a Central Metal Lock

机译:双功能DNA Architectonics:具有粘性Per双酰亚胺盖和中央金属锁的三向结

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摘要

A new type of a bifunctional DNA architecture based on a three way junction is developed that combines the structural motif of sticky perylene bisimide caps with a tris-bipyridyl metal ion lock in the center part. A clear stabilizing effect was observed in the presence of Fe~(3+), Ni~(2+) and Zn~(2+) by the formation of corresponding bipyridyl complexes in the branching part of the DNA three way junctions. The dimerization of the 5’-terminally attached perylene diimides (PDI) chromophores by hydrophobic interactions can be followed by significant changes in the UV/Vis absorption and steady-state fluorescence. The PDImediated DNA assembly occurs at temperatures below the melting temperature and is not influenced by the metal-ion bipyridyl locks in the central part. The corresponding AFM images revealed the formation of higherordered structures as the result of DNA assemblies mediated by the PDI interactions.
机译:开发了一种基于三向连接的新型双功能DNA结构,该结构将粘性per二酰亚胺帽的结构图案与中心部分的三联吡啶金属离子锁结合在一起。在Fe〜(3 +),Ni〜(2+)和Zn〜(2+)的存在下,通过在DNA三向连接的分支部分形成相应的联吡啶配合物,观察到了明显的稳定作用。 5'末端连接的per二酰亚胺(PDI)生色团通过疏水作用二聚化后,UV / Vis吸收和稳态荧光会发生显着变化。 PDI介导的DNA组装发生在低于解链温度的温度下,不受中央部分的金属离子联吡啶基锁的影响。相应的AFM图像揭示了由PDI相互作用介导的DNA组装的结果,形成了更高阶的结构。

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