CACNA1E基因编码电压门控钙通道的α1亚基(Cav2.3),属于钙通道基因家族(voltage-gated calcium channel family)。该家族成员通过形成跨膜孔道调控钙离子内流,在神经兴奋性、肌肉收缩和激素分泌等生理过程中起关键作用。CACNA1E主要在神经元高表达,其产生的Cav2.3通道属于R型钙通道(R-type calcium channel),特点是激活电压较高(约-30mV)且失活较慢,参与调节神经递质释放、树突整合和基因表达调控。该基因突变可导致通道功能异常,如功能获得性突变(gain-of-function mutation)会增强神经元兴奋性,与发育性癫痫性脑病(developmental and epileptic encephalopathy)相关,表现为早发难治性癫痫和严重神经发育障碍;而功能丧失性突变(loss-of-function mutation)可能影响突触可塑性。CACNA1E过表达会提高神经元钙信号强度,可能诱发异常放电和神经毒性,与自闭症谱系障碍(ASD)和精神分裂症风险相关;表达降低则可能损害突触传递和长时程增强(LTP,一种学习记忆相关的突触强化机制)。该基因与CACNA1A/B/D等同属CACNA1家族,成员均含4个重复结构域(每个含6个跨膜段),通过电压感受器(voltage sensor)响应膜电位变化。目前"CACNA1E"中文译名"电压门控钙通道α1E亚基"为通用译法,其致病机制研究对开发靶向钙通道的抗癫痫药物有重要意义。
Voltage-dependent calcium channels are multisubunit complexes consisting of alpha-1, alpha-2, beta, and delta subunits in a 1:1:1:1 ratio. These channels mediate the entry of calcium ions into excitable cells, and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. This gene encodes the alpha-1E subunit of the R-type calcium channels, which belong to the 'high-voltage activated' group that maybe involved in the modulation of firing patterns of neurons important for information processing. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Apr 2011]
电压依赖性钙通道是由α-1的多亚基复合物,α-2,以1测试,和delta亚基:1:1:1的比例。这些通道介导的钙离子进入可兴奋细胞,并也参与多种钙依赖性过程,包括肌肉收缩,激素或神经递质的释放,基因表达,细胞运动,细胞分裂和细胞死亡。该基因编码的R型钙通道,它属于“高压活化的‘组,也许参与放电神经元为信息处理重要的模式的调制的α-1E亚基。编码不同同种型的可变剪接转录物变体已被用于这个基因说明。 [由RefSeq的,2011年4月提供]
CACNA1E基因(以及对应的蛋白质)的细胞分布位置:
CACNA1E基因的本体(GO)信息:
名称 |
---|
4010 MAPK signaling pathway [PATH:hsa04010] |
4020 Calcium signaling pathway [PATH:hsa04020] |
4930 Type II diabetes mellitus [PATH:hsa04930] |
名称 |
---|
Depolarization of the Presynaptic Terminal Triggers the Opening of Calcium Channels |
Integration of energy metabolism |
Metabolism |
Neuronal System |
Regulation of insulin secretion |
Transmission across Chemical Synapses |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Diabetes Mellitus, Non-Insulin-Dependent | 0.00554839 | 3 | 0 | BeFree_GAD |
Migraine with Aura | 0.002638474 | 1 | 0 | BeFree_GAD |
Common Migraine | 0.002638474 | 2 | 0 | BeFree_GAD |
Tobacco Use Disorder | 0.002367032 | 1 | 0 | GAD |
Hyperparathyroidism, Secondary | 0.002367032 | 1 | 0 | GAD |
Pain | 0.000271442 | 1 | 0 | BeFree |
Impaired glucose tolerance | 0.000271442 | 1 | 0 | BeFree |
Precursor B-cell lymphoblastic leukemia | 0.000271442 | 1 | 0 | BeFree |
Cholera | 0.000271442 | 1 | 0 | BeFree |
山东省济南市章丘区文博路2号 齐鲁师范学院 genelibs生信实验室
山东省济南市高新区舜华路750号大学科技园北区F座4单元2楼
电话: 0531-88819269
E-mail: product@genelibs.com
关注微信订阅号,实时查看信息,关注医学生物学动态。