Affinity Interactions between Phenylboronic Acid-Carrying Self-Assembled Monolayers and Flavin Adenine Dinucleotide or Horseradish Peroxidase
作者:Songqin Liu、Ulla Wollenberger、Jan Halámek、Eik Leupold、Walter Stöcklein、Axel Warsinke、Frieder W. Scheller
DOI:10.1002/chem.200400827
日期:2005.7.4
A method is provided for the recognition of glycated molecules based on their binding affinities to boronate-carrying monolayers. The affinity interaction of flavin adenine dinucleotide (FAD) and horseradish peroxidase (HRP) with phenylboronic acid monolayers on gold was investigated by using voltammetric and microgravimetric methods. Conjugates of 3-aminophenylboronic acid and 3,3'-dithiodipropionic
提供了一种基于糖基化分子与携带硼酸酯的单分子层的结合亲和力来识别糖基化分子的方法。通过伏安法和微重力法研究了黄素腺嘌呤二核苷酸(FAD)和辣根过氧化物酶(HRP)与苯基硼酸单层在金上的亲和相互作用。制备了3-氨基苯基硼酸和3,3'-二硫代二丙酸二(N-羟基琥珀酰亚胺酯)或11-巯基十一烷酸的缀合物,并在金表面上自组装以产生单层。FAD结合到该修饰的表面上,并在pH值为0.1的0.1 M磷酸盐缓冲溶液中被一对氧化还原峰识别,其形式电位为-0.433V。在向缓冲液中添加糖后,结合的FAD可以被替换,表明结合是可逆的。伏安,质量测量,光度活性分析表明,HRP也可以与界面结合。这种结合是可逆的,HRP可以被山梨糖醇替代或在酸性溶液中去除。pH值,孵育时间和H(2)O(2)的浓度的影响是通过比较在电子供体亚硫氨酸存在下H(2)O(2)的催化还原来研究的。装有HRP的电极的催化电流与孵育溶液中HRP的浓度成正比,范围在5