Clathrin-independent endocytosis: a unique platform for cell signaling and PM remodeling.

Clathrin-independent endocytosis: a unique platform for cell signaling and PM remodeling.
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DOI:
10.1016/j.cellsig.2008.06.020
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发表时间:
2009-01
影响因子:
4.8
通讯作者:
Cohen, Lee Ann
Cohen, Lee Ann
中科院分区:
生物学2区
文献类型:
--
作者:
Donaldson, Julie G.;Porat-Shliom, Natalie;Cohen, Lee Ann

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有越来越多的兴趣,发生独立的网格蛋白外套和命运的膜蛋白内化,这一机制的内吞作用。不依赖网格蛋白的内吞和膜再循环途径的出现似乎随不同的细胞类型和货物分子而变化。在这篇综述中,我们专注于已进行的研究,使用Hela和COS细胞作为模型系统,了解这种膜运输系统。这些内体膜含有信号分子,包括H-Ras、Rac 1、Arf 6和Rab蛋白,以及富含胆固醇和PIP 2的脂质环境,为细胞信号传导提供了独特的平台。此外,这些信号分子(H-Ras,Rac和Arf 6)的一些激活可以切换到一个刺激的一个,与PM皱褶和巨胞饮相关的网格蛋白独立的内吞作用的组成型。
There is increasing interest in endocytosis that occurs independently of clathrin coats and the fates of membrane proteins internalized by this mechanism. The appearance of clathrin-independent endocytic and membrane recycling pathways seems to vary with different cell types and cargo molecules. In this review we focus on studies that have been performed using Hela and COS cells as model systems for understanding this membrane trafficking system. These endosomal membranes contain signaling molecules including H-Ras, Rac1, Arf6 and Rab proteins, and a lipid environment rich in cholesterol and PIP2 providing a unique platform for cell signaling. Furthermore, activation of some of these signaling molecules (H-Ras, Rac and Arf6) can switch the constitutive form of clathrin-independent endocytosis into a stimulated one, associated with PM ruffling and macropinocytosis.
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