[Beta]IV-spectrin regulates sodium channel clustering through ankyrin-G at axon initial segments and nodes of Ranvier.

[Beta]IV-spectrin regulates sodium channel clustering through ankyrin-G at axon initial segments and nodes of Ranvier.
复制标题

DOI:
10.1083/jcb.200110003
复制
发表时间:
2002-01-21
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Soriano P
Soriano P
中科院分区:
其他
文献类型:
--
作者:
Komada M;Soriano P

文献摘要

参考文献

被引文献

相似文献

β-Spectrin和锚蛋白是膜细胞骨架的主要成分。我们利用胚胎干细胞中的基因诱捕技术培育出了携带βIV-spectrin基因零突变的小鼠。突变纯合的小鼠表现出震颤和后肢收缩。βIV-spectrin的表达主要局限于神经元,它在轴突初始段(AISs)和Ranvier节点(NR)与锚定蛋白g共定位并结合。在β iv -谱蛋白缺失的神经元中,锚定蛋白g和电压门控钠通道(VGSC)都没有正确聚集在这些位点上,这表明VGSC定位错误导致的动作电位受损导致了这种表型。相反,在锚蛋白- g缺失的神经元中,βIV-spectrin并不局限于这些位点。这些结果表明βIV-spectrin和锚定蛋白g相互稳定了AIS和NR的膜蛋白簇和连接的膜细胞骨架。
β-Spectrin and ankyrin are major components of the membrane cytoskeleton. We have generated mice carrying a null mutation in the βIV-spectrin gene using gene trapping in embryonic stem cells. Mice homozygous for the mutation exhibit tremors and contraction of hindlimbs. βIV-spectrin expression is mostly restricted to neurons, where it colocalizes with and binds to ankyrin-G at axon initial segments (AISs) and nodes of Ranvier (NR). In βIV-spectrin–null neurons, neither ankyrin-G nor voltage-gated sodium channels (VGSC) are correctly clustered at these sites, suggesting that impaired action potential caused by mislocalization of VGSC leads to the phenotype. Conversely, in ankyrin-G–null neurons, βIV-spectrin is not localized to these sites. These results indicate that βIV-spectrin and ankyrin-G mutually stabilize the membrane protein cluster and the linked membrane cytoskeleton at AIS and NR.
DOI: 10.1083/jcb.200104038
发表时间: 2001-07-09
影响因子: 7.8
作者:
More, M I;Kirsch, F P;Rathjen, F G
通讯作者: Rathjen, F G
DOI: 10.1016/s0169-328x(98)00068-0
发表时间: 1998-06-15
期刊: MOLECULAR BRAIN RESEARCH
影响因子: --
作者:
Ohara, O;Ohara, R;Nakayama, M
通讯作者: Nakayama, M
DOI: 10.1523/jneurosci.19-17-07516.1999
发表时间: 1999-09-01
影响因子: 5.3
作者:
Rasband, MN;Peles, E;Shrager, P
通讯作者: Shrager, P
Ranvier节点的分子组成:在淋巴结段鉴定Ankyrin结合细胞粘附分子神经胶质素(粘蛋白+/第三FNIII结构域)和NRCAM。
DOI: 10.1083/jcb.135.5.1355
发表时间: 1996-12
期刊: The Journal of cell biology
影响因子: --
作者:
Davis JQ;Lambert S;Bennett V
通讯作者: Bennett V
DOI: 10.1083/jcb.115.1.267
发表时间: 1991-10-01
影响因子: 7.8
作者:
KENNEDY, SP;WARREN, SL;MORROW, JS
通讯作者: MORROW, JS