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首页> 外文期刊>Nature cell biology >Genome-wide RNAi screening identifies human proteins with a regulatory function in the early secretory pathway.
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Genome-wide RNAi screening identifies human proteins with a regulatory function in the early secretory pathway.

机译:全基因组RNAi筛选可鉴定在早期分泌途径中具有调节功能的人蛋白质。

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摘要

The secretory pathway in mammalian cells has evolved to facilitate the transfer of cargo molecules to internal and cell surface membranes. Use of automated microscopy-based genome-wide RNA interference screens in cultured human cells allowed us to identify 554 proteins influencing secretion. Cloning, fluorescent-tagging and subcellular localization analysis of 179 of these proteins revealed that more than two-thirds localize to either the cytoplasm or membranes of the secretory and endocytic pathways. The depletion of 143 of them resulted in perturbations in the organization of the COPII and/or COPI vesicular coat complexes of the early secretory pathway, or the morphology of the Golgi complex. Network analyses revealed a so far unappreciated link between early secretory pathway function, small GTP-binding protein regulation, actin cytoskeleton organization and EGF-receptor-mediated signalling. This work provides an important resource for an integrative understanding of global cellular organization and regulation of the secretory pathway in mammalian cells.
机译:哺乳动物细胞中的分泌途径已得到发展,以促进货物分子转移至内部和细胞表面膜。在培养的人类细胞中使用基于自动显微镜的全基因组全RNA干扰筛查技术使我们能够鉴定出影响分泌的554种蛋白质。对这些蛋白质中的179种进行克隆,荧光标记和亚细胞定位分析表明,超过三分之二的蛋白质定位于分泌和内吞途径的细胞质或膜。其中143种的耗竭导致早期分泌途径的COPII和/或COPI囊泡复合物的组织或高尔基复合物的形态受到干扰。网络分析表明,到目前为止,早期分泌途径功能,小的GTP结合蛋白调节,肌动蛋白细胞骨架组织和EGF受体介导的信号传导之间尚未发现联系。这项工作为全面了解哺乳动物细胞中的整体细胞组织和分泌途径的调控提供了重要资源。

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