A nutrient-induced affinity switch controls mTORC1 activation by its Rag GTPase-Ragulator lysosomal scaffold.
A nutrient-induced affinity switch controls mTORC1 activation by its Rag GTPase-Ragulator lysosomal scaffold.
复制标题
DOI:
10.1038/s41556-018-0148-6
复制
发表时间:
2018-09
影响因子:
21.3
通讯作者:
Zoncu R
中科院分区:
文献类型:
--
作者:
Lawrence RE;Cho KF;Rappold R;Thrun A;Tofaute M;Kim DJ;Moldavski O;Hurley JH;Zoncu R
A key step in nutrient sensing is the activation of the master growth regulator, mTORC1 kinase, on the surface of lysosomes. Nutrients enable mTORC1 scaffolding by a complex composed of the Rag GTPases (Rags) and Ragulator, but the underlying mechanism of mTORC1 capture is poorly understood. Combining dynamic imaging in cells and reconstituted systems, we uncover an affinity switch that controls mTORC1 lifetime and activation at the lysosome. Nutrients destabilize the Rag-Ragulator interface, causing cycling of the Rags between lysosome-bound Ragulator and the cytoplasm, and rendering mTORC1 capture contingent on simultaneous engagement of two Rag-binding interfaces. Rag GTPase domains trigger cycling by coordinately weakening binding of the C-terminal domains to Ragulator in a nucleotide-controlled manner. Cancer-specific Rag mutants override release from Ragulator and enhance mTORC1 recruitment and signaling output. Cycling in the active state sets the Rags apart from most signaling GTPases, and provides a mechanism to attenuate mTORC1 signaling.
登录
查看更多内容
影响因子:
64.5
作者:
Horiuchi, H;Lippe, R;Zerial, M
通讯作者:
Zerial, M
影响因子:
28.2
作者:
Grabiner BC;Nardi V;Birsoy K;Possemato R;Shen K;Sinha S;Jordan A;Beck AH;Sabatini DM
通讯作者:
Sabatini DM
DOI:
10.1126/science.aag1417
发表时间:
2017-03-24
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Castellano BM;Thelen AM;Moldavski O;Feltes M;van der Welle RE;Mydock-McGrane L;Jiang X;van Eijkeren RJ;Davis OB;Louie SM;Perera RM;Covey DF;Nomura DK;Ory DS;Zoncu R
通讯作者:
Zoncu R
影响因子:
64.5
作者:
Demetriades C;Doumpas N;Teleman AA
通讯作者:
Teleman AA
影响因子:
56.9
作者:
Knight, Spencer C.;Xie, Liangqi;Tjian, Robert
通讯作者:
Tjian, Robert