Endoplasmic reticulum targeting and insertion of tail-anchored membrane proteins by the GET pathway.

Endoplasmic reticulum targeting and insertion of tail-anchored membrane proteins by the GET pathway.
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GET途径的内质网靶向和插入尾部锚固的膜蛋白。

DOI:
10.1101/cshperspect.a013334
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发表时间:
2013-08-01
影响因子:
7.2
通讯作者:
Sinning I
Sinning I
中科院分区:
生物学1区
文献类型:
--
作者:
Denic V;Dötsch V;Sinning I

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数百种真核生物膜蛋白通过其C-末端的单个跨膜结构域锚定到膜上。这些尾锚定(TA)蛋白中的许多在转录后被靶向至内质网(ER)膜以通过引导进入TA蛋白插入(GET)途径插入。近年来,这一保守途径的大多数成分都已进行了生物化学和结构表征。Get 3是通路靶向因子,其利用核苷酸连接的构象变化来介导TA蛋白在胞质溶胶中的GET预靶向机制和ER中的跨膜通路组分之间的递送。在这里,我们专注于酵母GET途径的机制,并在其膜插入步骤和ABC转运蛋白的ATP酶驱动循环之间进行推测性类比。
Hundreds of eukaryotic membrane proteins are anchored to membranes by a single transmembrane domain at their C-terminus. Many of these tail-anchored (TA) proteins are post-translationally targeted to the endoplasmic reticulum (ER) membrane for insertion by the Guided-Entry of TA protein insertion (GET) pathway. In recent years most of the components of this conserved pathway have been biochemically and structurally characterized. Get3 is the pathway targeting factor that utilizes nucleotide-linked conformational changes to mediate the delivery of TA proteins between the GET pre-targeting machinery in the cytosol and the transmembrane pathway components in the ER. Here we focus on the mechanism of the yeast GET pathway and make a speculative analogy between its membrane insertion step and the ATPase-driven cycle of ABC transporters.
DOI: 10.1038/nrm3226
发表时间: 2011-11-16
期刊: Nature reviews. Molecular cell biology
影响因子: --
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