细胞膜电位对非离子通道膜蛋白功能的调节

摘要

细胞膜内外两侧离子种类的不均匀分布以及不同离子顺各自电化学梯度扩散形成了细胞膜电位(transmembrane potential).膜电位对许多功能性的膜蛋白具有调节作用例如:离子通道(ion channels)、转运体(transporters)、钠钾泵(pumps)以及一些酶类(enzymes)等.膜电位的改变对细胞膜功能蛋白的调节是电刺激信号转成细胞内信号转导的关键,电压门控离子通道的研究比较广泛,也是大家所熟悉的,而膜电位对细胞膜非离子通道功能蛋白也具有重要的调节作用.%Objective: The different concentration of specific ion species and the electrodiffusion of thernions down their electrochemical gradient generate transmembrane potential. The regulation of membrane potential for the function of numerous membrane proteins such as ion channels, transporters, pumps and enzymes plays primary role in the conversion of extracellular electric stimulation into a sequence of intracellular biochemical signals. Some ion channels regulated by membrane potential are well known, and the membrane non-ion channels protein is also modulated physiologically by membrane potential.