Are Rab proteins the link between Golgi organization and membrane trafficking?

Are Rab proteins the link between Golgi organization and membrane trafficking?
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DOI:
10.1007/s00018-012-1021-6
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发表时间:
2012-12
影响因子:
8
通讯作者:
Storrie, Brian
Storrie, Brian
中科院分区:
生物学1区
文献类型:
--
作者:
Liu, Shijie;Storrie, Brian

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高尔基体功能在称为池的亚室之间的基本分离在所有真核生物中是保守的。同样,Rab蛋白,Ras超家族的小GTP酶,是高尔基体组织和蛋白质转运的假定共同协调者。然而,尽管序列保守,例如,Rab6和Ypt6是人类和酵母之间的保守蛋白质,细胞器的基本组织可以有很大的不同。在酵母Sacchromyces cerevisiae中,高尔基池彼此物理分离,而在哺乳动物细胞中,池一个堆叠在另一个上。此外,在哺乳动物细胞中,许多高尔基体堆叠通常连接在一起以产生带状结构。进化上保守的Rab蛋白调节分泌膜运输和不同的高尔基体组织在一个共同的方式?在哺乳动物细胞中,一些高尔基体相关的Rab蛋白在协调蛋白质运输和维持高尔基体组织中起作用。其中包括Rab6、Rab33B、Rab1、Rab2、Rab18和Rab43。在酵母中,这些包括Ypt1,Ypt32和Ypt6。在这里,基于酵母和哺乳动物细胞的证据,我们推测Rab蛋白在高尔基体组织和蛋白质运输中的重要作用。
The fundamental separation of Golgi function between subcompartments termed cisternae is conserved across all eukaryotes. Likewise, Rab proteins, small GTPases of the Ras superfamily, are putative common coordinators of Golgi organization and protein transport. However, despite sequence conservation, e.g., Rab6 and Ypt6 are conserved proteins between humans and yeast, the fundamental organization of the organelle can vary profoundly. In the yeast Sacchromyces cerevisiae, the Golgi cisternae are physically separated from one another while, in mammalian cells, the cisternae are stacked one upon the other. Moreover, in mammalian cells many Golgi stacks are typically linked together to generate a ribbon structure. Do evolutionarily conserved Rab proteins regulate secretory membrane trafficking and diverse Golgi organization in a common manner? In mammalian cells, some Golgi associated Rab proteins function in coordination of protein transport and maintenance of Golgi organization. These include Rab6, Rab33B, Rab1, Rab2, Rab18 and Rab43. In yeast, these include Ypt1, Ypt32 and Ypt6. Here, based on evidence from both yeast and mammalian cells, we speculate on the essential role of Rab proteins in Golgi organization and protein transport.
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