GATOR1-dependent recruitment of FLCN-FNIP to lysosomes coordinates Rag GTPase heterodimer nucleotide status in response to amino acids.
GATOR1-dependent recruitment of FLCN-FNIP to lysosomes coordinates Rag GTPase heterodimer nucleotide status in response to amino acids.
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DOI:
10.1083/jcb.201712177
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发表时间:
2018-08-06
期刊:
影响因子:
--
通讯作者:
Ferguson SM
中科院分区:
文献类型:
--
作者:
Meng J;Ferguson SM
A large number of lysosome-localized proteins control mTORC1 signaling. Rag guanosine triphosphatase (GTPase) heterodimers play a central role in this pathway by recruiting mTORC1 to lysosomes. Meng and Ferguson reveal how folliculin, a tumor suppressor, coordinates nucleotide states within Rag GTPase heterodimers. Folliculin (FLCN) is a tumor suppressor that coordinates cellular responses to changes in amino acid availability via regulation of the Rag guanosine triphosphatases. FLCN is recruited to lysosomes during amino acid starvation, where it interacts with RagA/B as a heterodimeric complex with FLCN-interacting proteins (FNIPs). The FLCN–FNIP heterodimer also has GTPase-activating protein (GAP) activity toward RagC/D. These properties raised two important questions. First, how is amino acid availability sensed to regulate lysosomal abundance of FLCN? Second, what is the relationship between FLCN lysosome localization, RagA/B interactions, and RagC/D GAP activity? In this study, we show that RagA/B nucleotide status determines the FLCN–FNIP1 recruitment to lysosomes. Starvation-induced FLCN–FNIP lysosome localization requires GAP activity toward Rags 1 (GATOR1), the GAP that converts RagA/B to the guanosine diphosphate (GDP)-bound state. This places FLCN–FNIP recruitment to lysosomes under the control of amino acid sensors that act upstream of GATOR1. By binding to RagA/BGDP and acting on RagC/D, FLCN–FNIP can coordinate nucleotide status between Rag heterodimer subunits in response to changes in amino acid availability.
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影响因子:
8.8
作者:
Chantranupong L;Wolfson RL;Orozco JM;Saxton RA;Scaria SM;Bar-Peled L;Spooner E;Isasa M;Gygi SP;Sabatini DM
通讯作者:
Sabatini DM
影响因子:
7.3
作者:
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通讯作者:
Puertollano R
DOI:
10.1083/jcb.201209135
发表时间:
2013-02-18
期刊:
The Journal of cell biology
影响因子:
--
作者:
Martina JA;Puertollano R
通讯作者:
Puertollano R
影响因子:
3.3
作者:
Amick J;Roczniak-Ferguson A;Ferguson SM
通讯作者:
Ferguson SM
影响因子:
4
作者:
Baldassari, Sara;Licchetta, Laura;Pippucci, Tommaso
通讯作者:
Pippucci, Tommaso