Ragulator-Rag complex targets mTORC1 to the lysosomal surface and is necessary for its activation by amino acids.

Ragulator-Rag complex targets mTORC1 to the lysosomal surface and is necessary for its activation by amino acids.
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DOI:
10.1016/j.cell.2010.02.024
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发表时间:
2010-04-16
期刊:
影响因子:
64.5
通讯作者:
Sabatini DM
Sabatini DM
中科院分区:
生物学1区
文献类型:
--
作者:
Sancak Y;Bar-Peled L;Zoncu R;Markhard AL;Nada S;Sabatini DM

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mTORC 1激酶促进生长以响应生长因子、能量水平和氨基酸,并且其活性通常在疾病中失调。Rag GTP酶与mTORC 1相互作用,并被提议通过促进mTORC 1易位至含有mTORC 1激活剂Rheb的膜结合区室来响应氨基酸而激活它。我们发现,氨基酸诱导mTORC 1的运动到溶酶体膜,在那里的拉格蛋白居住。由MAPKSP 1、ROBLD 3和c11 orf 59基因编码的复合物,我们称之为Ragulator,与Rag GTP酶相互作用,将它们募集到溶酶体,并且对mTORC 1活化至关重要。mTORC 1组成性靶向溶酶体表面足以使mTORC 1途径氨基酸不敏感且不依赖于Rag和Ragulator,但不依赖于Rheb功能。因此,Rag-Ragulator介导的mTORC 1向溶酶体膜的易位是氨基酸信号传导至mTORC 1的关键事件。
The mTORC1 kinase promotes growth in response to growth factors, energy levels, and amino acids and its activity is often deregulated in disease. The Rag GTPases interact with mTORC1 and are proposed to activate it in response to amino acids by promoting mTORC1 translocation to a membrane-bound compartment that contains the mTORC1 activator Rheb. We show that amino acids induce the movement of mTORC1 to lysosomal membranes, where the Rag proteins reside. A complex encoded by the MAPKSP1, ROBLD3, and c11orf59 genes, which we term Ragulator, interacts with the Rag GTPases, recruits them to lysosomes, and is essential for mTORC1 activation. Constitutive targeting of mTORC1 to the lysosomal surface is sufficient to render the mTORC1 pathway amino acid insensitive and independent of Rag and Ragulator, but not Rheb, function. Thus, Rag-Ragulator mediated translocation of mTORC1 to lysosomal membranes is the key event in amino acid signaling to mTORC1.
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