G3BPs tether the TSC complex to lysosomes and suppress mTORC1 signaling.
Adaptor Proteins, Signal Transducing
/ metabolism
Amino Acid Sequence
Animals
Breast Neoplasms
/ metabolism
Cell Line, Tumor
Cell Movement
/ drug effects
Cytoplasmic Granules
/ drug effects
DNA Helicases
/ chemistry
Evolution, Molecular
Female
Humans
Insulin
/ pharmacology
Lysosomal Membrane Proteins
/ metabolism
Lysosomes
/ drug effects
Mechanistic Target of Rapamycin Complex 1
/ metabolism
Neurons
/ drug effects
Phenotype
Poly-ADP-Ribose Binding Proteins
/ chemistry
RNA Helicases
/ chemistry
RNA Recognition Motif Proteins
/ chemistry
RNA-Binding Proteins
/ metabolism
Rats, Wistar
Signal Transduction
/ drug effects
Tuberous Sclerosis
/ metabolism
Zebrafish
/ metabolism
G3BP1
G3BP2
TSC complex
cancer
lysosome
mTORC1
metabolism
neuronal function
stress granule
Journal
Cell
ISSN: 1097-4172
Titre abrégé: Cell
Pays: United States
ID NLM: 0413066
Informations de publication
Date de publication:
04 02 2021
04 02 2021
Historique:
received:
01
04
2020
revised:
03
11
2020
accepted:
14
12
2020
pubmed:
27
1
2021
medline:
25
8
2021
entrez:
26
1
2021
Statut:
ppublish
Résumé
Ras GTPase-activating protein-binding proteins 1 and 2 (G3BP1 and G3BP2, respectively) are widely recognized as core components of stress granules (SGs). We report that G3BPs reside at the cytoplasmic surface of lysosomes. They act in a non-redundant manner to anchor the tuberous sclerosis complex (TSC) protein complex to lysosomes and suppress activation of the metabolic master regulator mechanistic target of rapamycin complex 1 (mTORC1) by amino acids and insulin. Like the TSC complex, G3BP1 deficiency elicits phenotypes related to mTORC1 hyperactivity. In the context of tumors, low G3BP1 levels enhance mTORC1-driven breast cancer cell motility and correlate with adverse outcomes in patients. Furthermore, G3bp1 inhibition in zebrafish disturbs neuronal development and function, leading to white matter heterotopia and neuronal hyperactivity. Thus, G3BPs are not only core components of SGs but also a key element of lysosomal TSC-mTORC1 signaling.
Identifiants
pubmed: 33497611
pii: S0092-8674(20)31694-9
doi: 10.1016/j.cell.2020.12.024
pmc: PMC7868890
pii:
doi:
Substances chimiques
Adaptor Proteins, Signal Transducing
0
G3BP2 protein, human
0
Insulin
0
Lysosomal Membrane Proteins
0
Poly-ADP-Ribose Binding Proteins
0
RNA Recognition Motif Proteins
0
RNA-Binding Proteins
0
Mechanistic Target of Rapamycin Complex 1
EC 2.7.11.1
DNA Helicases
EC 3.6.4.-
G3BP1 protein, human
EC 3.6.4.12
RNA Helicases
EC 3.6.4.13
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
655-674.e27Subventions
Organisme : Medical Research Council
ID : MC_PC_16035
Pays : United Kingdom
Organisme : Cancer Research UK
Pays : United Kingdom
Informations de copyright
Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests The authors declare no competing interests.
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