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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >The p24 proteins are not essential for vesicular transport in Saccharomyces cerevisiae
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The p24 proteins are not essential for vesicular transport in Saccharomyces cerevisiae

机译:p24蛋白对于酿酒酵母中的水泡运输不是必需的

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摘要

To investigate the factors involved in the sorting of cargo proteins into COPll endoplasmic reticulum (ER) to Golgi apparatus transport vesicles, we have created a strain of S. cerevisiae (p24△8) that lacks all eight members of the p24 family of transmembrane proteins (Emp24p, Erv25p, and Erp1 p to Erp6p). The p24 proteins have been implicated in COPI and COPIl vesicle formation, cargo protein sorting, and regulation of vesicular transport in eukaryotic cells. We find that p24△8 cells grow identically to wild type and show delays of invertase and Gas1p ER-to-Golgi transport identical to those seen in a single △emP24 deletion strain. Thus, P24 proteins do not have an essential function in the secretory pathway. Instead, they may serve as quality control factors to restrict the entry of proteins into COPll vesicles.
机译:为了研究将货物蛋白分类到COPII内质网(ER)到高尔基体运输小泡中的相关因素,我们创建了一种酿酒酵母(p24△8)菌株,该菌株缺少p24跨膜蛋白家族的所有八个成员。 (Emp24p,Erv25p和Erp1p至Erp6p)。 p24蛋白已牵涉到真核细胞中的COPI和COPI1囊泡形成,货物蛋白分选和调节囊泡转运。我们发现p24△8细胞与野生型相同生长,并且显示的转化酶和Gas1p ER到高尔基体运输的延迟与在单个△emP24缺失菌株中看到的相同。因此,P24蛋白在分泌途径中没有必需的功能。相反,它们可以用作质量控制因子以限制蛋白质进入COP11囊泡。

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