A plasma-membrane E-MAP reveals links of the eisosome with sphingolipid metabolism and endosomal trafficking.

A plasma-membrane E-MAP reveals links of the eisosome with sphingolipid metabolism and endosomal trafficking.
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DOI:
10.1038/nsmb.1829
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发表时间:
2010-07
影响因子:
16.8
通讯作者:
--
中科院分区:
生物学1区
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质膜界定细胞并控制其自身与环境之间的物质和信息交换。不同的质膜过程是如何协调的,以及质膜脂质和蛋白质的相对丰度是如何保持稳态的,目前还不清楚。在这里,我们使用了定量遗传相互作用图,或E-MAP,功能询问一组约400个基因,涉及质膜生物学的各个方面,包括内吞作用,信号传导,脂质代谢和eisosome功能。从这个E-MAP中,我们得出了一组在这些不同过程中发挥作用的基因之间的57,799个个体相互作用。使用三联体遗传基序分析,我们确定了一个新的组成部分的eisosome,EMP 1,并连接到内吞和eisosome功能的特点不佳的基因EMP 70。最后,我们牵连Rom 2,一个GDP/GTP交换因子Rho 1和Rho 2,在调节鞘脂代谢。
The plasma membrane delimits the cell and controls material and information exchange between itself and the environment. How different plasma-membrane processes are coordinated and how the relative abundance of plasma-membrane lipids and proteins is homeostatically maintained are not yet understood. Here, we used a quantitative genetic interaction map, or E-MAP, to functionally interrogate a set of ~400 genes involved in various aspects of plasma-membrane biology, including endocytosis, signaling, lipid metabolism and eisosome function. From this E-MAP, we derived a set of 57,799 individual interactions between genes functioning in these various processes. Using triplet genetic motif analysis, we identified a new component of the eisosome, Eis1, and linked the poorly characterized gene EMP70 to endocytic and eisosome function. Finally, we implicated Rom2, a GDP/GTP exchange factor for Rho1 and Rho2, in the regulation of sphingolipid metabolism.
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