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
中科院分区:
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
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.
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