Dizinc Phosphohydrolase Model Built on a<i>m</i>-Terphenyl Scaffold and Its Use in Indicator Displacement Assays for Pyrophosphate Under Physiological Conditions
作者:Michael K. Coggins、Austa M. Parker、Anshuman Mangalum、Gabriela A. Galdamez、Rhett C. Smith
DOI:10.1002/ejoc.200800882
日期:2009.1
the dizinc complex of L2 (Zn2L2) binding to phosphate, pyrophosphate and commercially available complexometric indicators were determined under physiological pH [10 mMN-(2-hydroxyethyl)piperazine-N′-2-ethanesulfonic acid (HEPES) buffer at pH 7.4]. Colorimetric and fluorescence-based indicator displacement assays with selectivity for pyrophosphate over other anions were achieved with Zn2L2 as the receptor
制备了构建在间三联苯支架上的双成核配体 1,3-双 [2-(di-2-picolylaminomethyl)phenyl]benzo, L2}。L2 (Zn2L2) 与磷酸盐、焦磷酸盐和市售络合指示剂结合的二锌复合物的解离常数在生理 pH [10 mM-(2-羟乙基)哌嗪-N'-2-乙磺酸 (HEPES) 缓冲液在pH 值 7.4]。以 Zn2L2 作为受体组分,实现了比色和荧光指示剂置换试验,对焦磷酸盐的选择性高于其他阴离子。这些测定对低至 2.5 × 10-6M 的焦磷酸盐浓度的定量显示出良好的响应特性,表明它们可用于测量滑液中的焦磷酸盐水平。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)