SCN7A基因(钠电压门控通道α亚基7)属于电压门控钠通道基因家族(VGSC),该家族成员编码形成跨膜蛋白的α亚基,负责产生和传播动作电位(电信号)。SCN7A主要在神经系统和心脏组织中表达,其编码的钠通道参与调控细胞膜电位和电信号传导。该基因的突变可能导致通道功能异常,影响神经兴奋性和心脏节律,与某些癫痫综合征和心律失常相关。SCN7A过表达可能增加细胞兴奋性,导致异常放电(如癫痫发作),而表达降低可能减弱电信号传导,引起传导阻滞或肌肉无力。VGSC家族共性包括:由α亚基(形成孔道)和辅助β亚基组成,受膜电位变化激活,介导钠离子快速内流。SCN7A的功能特点包括缓慢失活特性(slow inactivation),可能参与调节持续钠电流。目前研究较少,其病理机制尚待进一步阐明。若存在翻译争议,"电压门控"可保留英文注释(voltage-gated)。
This gene encodes one of the many voltage-gated sodium channel proteins. For proper functioning of neurons and muscles during action potentials, voltage-gated sodium channels direct sodium ion diffusion for membrane depolarization. This sodium channel protein has some atypical characteristics; the similarity between the human and mouse proteins is lower compared to other orthologous sodium channel pairs. Also, the S4 segments, which sense voltage changes, have fewer positive charged residues that in other sodium channels; domain 4 has fewer arginine and lysine residues compared to other sodium channel proteins. Several alternatively spliced transcript variants exist, but the full-length natures of all of them remain unknown. [provided by RefSeq, Dec 2011]
该基因编码的许多电压 - 门控钠通道蛋白之一。用于在动作电位的神经元和肌肉的正常运作,电压门控钠通道为膜去极化直接钠离子扩散。这种钠离子通道蛋白有一定的非典型特征;相比其他直向同源钠通道对人类和小鼠蛋白质之间的相似性较低。另外,S4段,其中感测电压的变化,有较少的正电荷的残基,在其他钠通道;相比其他钠通道蛋白域4具有较少的精氨酸和赖氨酸残基。几个可变剪接转录物变体的存在,但它们的全长性质仍然是未知的。 [由RefSeq的,2011年12月提供]
SCN7A基因(以及对应的蛋白质)的细胞分布位置:
SCN7A基因的本体(GO)信息:
名称 |
---|
4261 Adrenergic signaling in cardiomyocytes [PATH:hsa04261] |
名称 |
---|
Axon guidance |
Developmental Biology |
Interaction between L1 and Ankyrins |
L1CAM interactions |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Autistic Disorder | 0.12 | 1 | 0 | CTD_human |
Hypertensive disease | 0.002367032 | 1 | 0 | GAD |
malignant neoplasm of frontal lobe | 0.002367032 | 1 | 2 | GAD |
Amyotrophic Lateral Sclerosis | 0.002367032 | 1 | 1 | GAD |
Central neuroblastoma | 0.001628651 | 6 | 0 | BeFree |
Neuroblastoma | 0.001628651 | 6 | 0 | BeFree |
Epilepsy | 0.000542884 | 2 | 0 | BeFree |
Cholera | 0.000542884 | 2 | 0 | BeFree |
Neuroectodermal Tumor, Primitive | 0.000271442 | 1 | 0 | BeFree |
Epilepsy, Temporal Lobe | 0.000271442 | 1 | 0 | BeFree |
关注微信订阅号,实时查看信息,关注医学生物学动态。