Use of affinity capillary electrophoresis to determine kinetic and equilibrium constants for binding of arylsulfonamides to bovine carbonic anhydrase
作者:Luis Z. Avila、Yen Ho Chu、Erich C. Blossey、George M. Whitesides
DOI:10.1021/jm00053a016
日期:1993.1
Determination of kinetic and equilibrium constants using ACE relies only on the changes in the migration time and shape (but not the area) of the peak due to protein. Simulation of the protein mobility under conditions of ACE suggests that the experimentally obtained electropherograms can be explained in terms of few variables: on and off rates (and thus, binding constant), concentration of the ligand(s)
亲和毛细管电泳(ACE)提供了一种研究蛋白质-配体相互作用的新方法。ACE的基础是蛋白质与其配体形成复合物时其电泳迁移率的变化。可以直接对带电荷的配体定量该结合相互作用,或与先前表征的带电荷的配体竞争间接对中性配体进行定量。使用ACE确定动力学常数和平衡常数仅取决于蛋白质的迁移时间和峰形(而不是峰面积)的变化。在ACE条件下对蛋白质迁移率的模拟表明,实验获得的电泳图可以用以下几个变量来解释:打开和关闭的速率(因此,结合常数),配体的浓度,