Early stages in the biogenesis of eukaryotic β‐barrel proteins

Early stages in the biogenesis of eukaryotic β‐barrel proteins
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真核β-桶蛋白生物发生的早期阶段

DOI:
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发表时间:
2017
期刊:
影响因子:
3.5
通讯作者:
D. Rapaport
D. Rapaport
中科院分区:
生物学3区
文献类型:
--
作者:
Tobias Jores;D. Rapaport

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内共生细胞器线粒体和叶绿体与它们的原核祖细胞类似,在它们的外膜中含有β桶蛋白。这些蛋白质在核DNA上编码,在细胞溶质核糖体上翻译,并通过专用的机器输入到其靶细胞器中。最近的研究提供了深入了解这些蛋白质的细胞器和膜插入的进口。虽然其生物发生的胞质阶段不太明确,但据推测,在其合成时,伴侣蛋白阻止β桶蛋白聚集并使其保持在可输入构象。在这篇综述中,我们总结了目前关于β-桶蛋白的生物起源的知识,重点是从细胞溶质核糖体上的翻译到细胞器表面上的识别的早期阶段。
The endosymbiotic organelles mitochondria and chloroplasts harbour, similarly to their prokaryotic progenitors, β‐barrel proteins in their outer membrane. These proteins are encoded on nuclear DNA, translated on cytosolic ribosomes and imported into their target organelles by a dedicated machinery. Recent studies have provided insights into the import into the organelles and the membrane insertion of these proteins. Although the cytosolic stages of their biogenesis are less well defined, it is speculated that upon their synthesis, chaperones prevent β‐barrel proteins from aggregation and keep them in an import‐competent conformation. In this Review, we summarize the current knowledge about the biogenesis of β‐barrel proteins, focusing on the early stages from the translation on cytosolic ribosomes to the recognition on the surface of the organelle.
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