KCNA4

钾离子通道从功能和结构上都代表了电压门控离子通道中最复杂的一类它们的多种功能包括调节神经递质释放、心率、胰岛素分泌、神经元兴奋性、上皮电解质转运、平滑肌收缩和细胞体积。在果蝇中发现了四个与钾通道相关的基因，分别是shaker、shaw、shab和shal，并且每个基因都有人类同源基因这个基因编码钾通道的一个成员，电压门控，摇床相关亚家族该成员包含六个跨膜结构域，在第四段中有一个振荡型重复。它属于A型钾电流类，其成员可能在调节心脏动作电位的快速复极阶段中起重要作用，从而可能影响心脏动作电位的持续时间。[由Refseq，2011年3月提供]
Potassium channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. Four sequence-related potassium channel genes - shaker, shaw, shab, and shal - have been identified in Drosophila, and each has been shown to have human homolog(s). This gene encodes a member of the potassium channel, voltage-gated, shaker-related subfamily. This member contains six membrane-spanning domains with a shaker-type repeat in the fourth segment. It belongs to the A-type potassium current class, the members of which may be important in the regulation of the fast repolarizing phase of action potentials in heart and thus may influence the duration of cardiac action potential.[provided by RefSeq, Mar 2011]