Anthraquinonyl glycoside facilitates the standardization of graphene electrodes for the impedance detection of lectins.

Anthraquinonyl glycoside facilitates the standardization of graphene electrodes for the impedance detection of lectins.
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蒽醌苷促进凝集素阻抗检测石墨烯电极的标准化

DOI:
10.1186/s13065-014-0067-y
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发表时间:
2014
影响因子:
--
通讯作者:
Long YT
Long YT
中科院分区:
化学3区
文献类型:
--
作者:
Zhu BW;Cai L;He XP;Chen GR;Long YT

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背景 利用自组装技术构建电化学阻抗传感器已成为检测蛋白质-配体相互作用的一种很有前途的无标记策略。然而,以前的阻抗传感器缺乏固有的电化学信号,这限制了传感器以可重复的方式进行蛋白质识别的标准化。 结果 我们设计并合成了一种可与石墨烯工作电极表面结合的蒽醌糖苷(AG),该糖苷作为凝集素的配体。通过测量AQ的固有伏安信号,可以简单地对修饰在工作电极上的糖苷进行量化,得到具有统一信号窗口的电极。随后,阻抗分析表明,在非选择性蛋白质存在的情况下,“标准化”电极对选择性凝集素具有可重复性的电化学响应,没有信号变化。 结论 用蒽醌修饰的配体可以促进电化学阻抗传感器的标准化,以便对配体-蛋白质相互作用进行可重复性的、选择性的分析。
Background Construction of electrochemical impedance sensors by the self-assembly technique has become a promising strategy for the `label-free' detection of protein-ligand interactions. However, previous impedance sensors are devoid of an inherent electrochemical signal, which limits the standardization of the sensors for protein recognition in a reproducible manner. Results We designed and synthesized an anthraquinonyl glycoside (AG) where the anthraquinone (AQ) moiety can bind to the surface of a graphene-based working electrode while the glycoside serving as a ligand for lectin. By measuring the inherent voltammetric signal of AQ, the glycosides decorated on the working electrode could be simply quantified to obtain electrodes with a unified signal window. Subsequently, impedance analysis showed that the `standardized' electrodes gave a reproducible electrochemical response to a selective lectin with no signal variation in the presence of unselective proteins. Conclusion Anthraquinone-modified ligands could be used to facilitate the standardization of electrochemical impedance sensors for the reproducible, selective analysis of ligand-protein interactions.
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