钯
超分子化学
等温滴定量热法
化学
碱基
堆积
圆二色性
DNA
结晶学
碱基对
立体化学
胞嘧啶
物理化学
晶体结构
有机化学
生物化学
催化作用
作者
Antonio Pérez‐Romero,Mario Cano-Muñoz,Carmen López-Chamorro,Francisco Conejero‐Lara,Òscar Palacios,José A. Dobado,Miguel A. Galindo
标识
DOI:10.1002/anie.202400261
摘要
The formation of highly organized metal‐DNA structures has significant implications in bioinorganic chemistry, molecular biology and material science due to their unique properties and potential applications. In this study, we report on the conversion of single‐stranded polydeoxycytidine (dC15) into a Pd‐DNA supramolecular structure using [Pd(Aqa)] complex (Aqa = 8‐amino‐4‐hydroxyquinoline‐2‐carboxylic acid) through a self‐assembly process. The resulting Pd‐DNA assembly closely resembles a natural double helix, with continuous [Pd(Aqa)(C)] (C = cytosine) units serving as palladium‐mediated base pairs, forming interbase hydrogen bonds and intrastrand stacking interactions. Notably, the design of the [Pd(Aqa)] complex favours the interaction with cytosine, distinguishing it from our previously reported [Pd(Cheld)] complex (Cheld = chelidamic acid). This finding opens possibilities for creating heteroleptic Pd‐DNA hybrids where different complexes specifically bind to nucleobases. We confirmed the Pd‐DNA supramolecular structural assembly and selective binding of the complexes using NMR spectroscopy, circular dichroism, mass spectrometry, isothermal titration calorimetry and DFT calculations.
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