Tail-anchored membrane protein insertion into the endoplasmic reticulum.

Tail-anchored membrane protein insertion into the endoplasmic reticulum.
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DOI:
10.1038/nrm3226
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发表时间:
2011-11-16
期刊:
Nature reviews. Molecular cell biology
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膜蛋白通过两条高度保守的平行途径插入内质网。经过充分研究的共翻译途径使用信号识别颗粒及其受体进行靶向,并使用 Sec61 易位子进行膜整合。最近发现的翻译后途径使用一组完全不同的因子,涉及跨膜结构域选择性胞质伴侣和内质网的伴随受体。阐明这种翻译后膜蛋白插入途径的结构和机制基础强调了两种途径之间共享的一般原则以及每种途径独特的关键区别。
Membrane proteins are inserted into the endoplasmic reticulum by two highly conserved parallel pathways. The well-studied co-translational pathway uses the signal recognition particle and its receptor for targeting, and the Sec61 translocon for membrane integration. A recently discovered post-translational pathway uses an entirely different set of factors involving transmembrane domain-selective cytosolic chaperones and an accompanying receptor at the endoplasmic reticulum. Elucidation of the structural and mechanistic basis of this post-translational membrane protein insertion pathway highlights general principles shared between the two pathways and key distinctions unique to each.
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