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Label-free Electrochemiluminescent Enantioselective Sensor for Distinguishing between Chiral Metallosupramolecular Complexes

机译:用于区分手性金属超分子复合物的无标记电化学发光对映选择性传感器

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摘要

Chiral molecular recognition of DNA is important for rational drug design and for developing structural probes of DNA conformation. Developing a convenient and inexpensive assay for sensitive and selective identification of DNA-specific binding compounds with rapid, easy manipulation is in ever-increasing demand. Here, we present a “turn-on” and label-free electrochemiluminescent (ECL) biosensor for distinguishing chiral metallosupramolecular complexes based on DNA three-way junction formation selectively induced by the analyte. The fabricated ECL sensor shows excellent performance in the chiral discrimination of two enantiomers with an enantioselective recognition ratio of up to 4.4. More importantly, as a “turn-on” detection system, the ECL chiral sensor does not suffer from false positives and limited signal range of “signal-off” systems. Therefore, this concept may provide a new insight into the design of efficient sensors for distinguishing chiral molecules and for investigating the interactions between DNA and small molecules.
机译:DNA的手性分子识别对于合理的药物设计和开发DNA构象的结构探针很重要。对快速,容易操作的灵敏和选择性鉴定DNA特异性结合化合物进行开发的便捷,廉价的检测方法的需求不断增长。在这里,我们介绍了一种“开启”且无标记的电化学发光(ECL)生物传感器,用于基于被分析物选择性诱导的DNA三向连接形成来区分手性金属超分子复合物。制成的ECL传感器在两种对映异构体的手性鉴别中表现出出色的性能,对映选择性识别率高达4.4。更重要的是,作为“开启”检测系统,ECL手征传感器不会出现误报和“信号关闭”系统信号范围受限的问题。因此,该概念可以为区分手性分子以及研究DNA与小分子之间的相互作用的有效传感器的设计提供新的见解。

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