A novel role for the nuclear membrane protein emerin in association of the centrosome to the outer nuclear membrane.

A novel role for the nuclear membrane protein emerin in association of the centrosome to the outer nuclear membrane.
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DOI:
10.1083/jcb.200702026
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发表时间:
2007-09-10
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Hutchison CJ
Hutchison CJ
中科院分区:
其他
文献类型:
--
作者:
Salpingidou G;Smertenko A;Hausmanowa-Petrucewicz I;Hussey PJ;Hutchison CJ

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II 型内核膜蛋白 emerin 是连接核纤层和肌动蛋白细胞骨架的 LINC 复合体的一个组成部分。在 emerin 缺失或缺陷的人真皮成纤维细胞中,我们发现中心体与细胞核分离。此外,在野生型成纤维细胞中用 siRNA 敲低 emerin 后,中心体也会与细胞核分离。我们表明,emerin 与微管蛋白相互作用,并且诺卡唑处理的野生型细胞表现出 emerin 无效/缺陷细胞的分离中心体特征。我们还发现,很大一部分 emerin 位于外核膜和外周内质网,在那里它直接与中心体相互作用。我们的数据为哺乳动物细胞中关于中心体以及微管蛋白细胞骨架与外核膜的连接性质提供了第一个证据。
The type II inner nuclear membrane protein emerin is a component of the LINC complex that connects the nuclear lamina to the actin cytoskeleton. In emerin-null or -deficient human dermal fibroblasts we find that the centrosome is detached from the nucleus. Moreover, following siRNA knockdown of emerin in wild-type fibroblasts, the centrosome also becomes detached from the nucleus. We show that emerin interacts with tubulin, and that nocadozole-treated wild-type cells phenocopy the detached centrosome characteristic of emerin-null/deficient cells. We also find that a significant fraction of emerin is located at the outer nuclear membrane and peripheral ER, where it interacts directly with the centrosome. Our data provide the first evidence in mammalian cells as to the nature of the linkage of the centrosome, and therefore the tubulin cytoskeleton, with the outer nuclear membrane.
Nesprin-3是一种新型的外核膜蛋白,与细胞骨架接头蛋白蛋白质相关。
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