The Sestrins interact with GATOR2 to negatively regulate the amino-acid-sensing pathway upstream of mTORC1.

The Sestrins interact with GATOR2 to negatively regulate the amino-acid-sensing pathway upstream of mTORC1.
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DOI:
10.1016/j.celrep.2014.09.014
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发表时间:
2014-10-09
期刊:
影响因子:
8.8
通讯作者:
Sabatini DM
Sabatini DM
中科院分区:
生物学1区
文献类型:
--
作者:
Chantranupong L;Wolfson RL;Orozco JM;Saxton RA;Scaria SM;Bar-Peled L;Spooner E;Isasa M;Gygi SP;Sabatini DM

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mTORC 1激酶是细胞生长的主要调节因子,对许多环境信号作出反应。关键输入是氨基酸,其通过异源二聚体Rag GTP酶(RagA/B结合至RagC/D)起作用以促进mTORC 1易位至溶酶体表面,其活化位点。GATOR 2是一种功能未知的复合物,其通过在GATOR 1的上游或与其平行作用而正向调节mTORC 1信号传导,GATOR 1是RagA/B的GTP酶激活蛋白(GAP)和氨基酸传感途径的抑制剂。在这里,我们发现,Sestrin,一个家庭的了解不多的生长调节因子(Sestrin 1 -3),相互作用与GATOR 2在一个氨基酸敏感的方式。Sestrin 2介导的mTORC 1信号传导抑制需要GATOR 1和Rag GTP酶,并且Sestrin调节mTORC 1响应于氨基酸的定位。因此,我们确定的Sestrins作为GATOR 2相互作用的蛋白质,调节mTORC 1途径的氨基酸传感分支。
The mTORC1 kinase is a major regulator of cell growth that responds to numerous environmental cues. A key input is amino acids, which act through the heterodimeric Rag GTPases (RagA/B bound to RagC/D) to promote the translocation of mTORC1 to the lysosomal surface, its site of activation. GATOR2 is a complex of unknown function that positively regulates mTORC1 signaling by acting upstream of or in parallel to GATOR1, which is a GTPase activating protein (GAP) for RagA/B and an inhibitor of the amino acid sensing pathway. Here, we find that the Sestrins, a family of poorly understood growth regulators (Sestrin1-3), interact with GATOR2 in an amino acid-sensitive fashion. Sestrin2-mediated inhibition of mTORC1 signaling requires GATOR1 and the Rag GTPases, and the Sestrins regulate the localization of mTORC1 in response to amino acids. Thus, we identify the Sestrins as GATOR2-interacting proteins that regulate the amino acid sensing branch of the mTORC1 pathway.
宇宙(癌症中的体细胞突变目录)数据库和网站。
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