Supramolecular assembly of GSK3α as a cellular response to amino acid starvation.
GSK3
Wnt
asparaginase
protein degradation
ubiquitin-proteasome system
Journal
Molecular cell
ISSN: 1097-4164
Titre abrégé: Mol Cell
Pays: United States
ID NLM: 9802571
Informations de publication
Date de publication:
04 08 2022
04 08 2022
Historique:
received:
01
02
2021
revised:
13
04
2022
accepted:
20
05
2022
pubmed:
23
6
2022
medline:
10
8
2022
entrez:
22
6
2022
Statut:
ppublish
Résumé
The tolerance of amino acid starvation is fundamental to robust cellular fitness. Asparagine depletion is lethal to some cancer cells, a vulnerability that can be exploited clinically. We report that resistance to asparagine starvation is uniquely dependent on an N-terminal low-complexity domain of GSK3α, which its paralog GSK3β lacks. In response to depletion of specific amino acids, including asparagine, leucine, and valine, this domain mediates supramolecular assembly of GSK3α with ubiquitin-proteasome system components in spatially sequestered cytoplasmic bodies. This effect is independent of mTORC1 or GCN2. In normal cells, GSK3α promotes survival during essential amino acid starvation. In human leukemia, GSK3α body formation predicts asparaginase resistance, and sensitivity to asparaginase combined with a GSK3α inhibitor. We propose that GSK3α body formation provides a cellular mechanism to maximize the catalytic efficiency of proteasomal protein degradation in response to amino acid starvation, an adaptive response co-opted by cancer cells for asparaginase resistance.
Identifiants
pubmed: 35732190
pii: S1097-2765(22)00492-0
doi: 10.1016/j.molcel.2022.05.025
pmc: PMC9357031
mid: NIHMS1811965
pii:
doi:
Substances chimiques
Amino Acids
0
Asparagine
7006-34-0
Protein Serine-Threonine Kinases
EC 2.7.11.1
Asparaginase
EC 3.5.1.1
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2858-2870.e8Subventions
Organisme : NCI NIH HHS
ID : P30 CA008748
Pays : United States
Organisme : NCI NIH HHS
ID : R01 CA193651
Pays : United States
Organisme : NCI NIH HHS
ID : R01 CA249678
Pays : United States
Informations de copyright
Copyright © 2022 Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests Boston Children’s Hospital has filed patents on the subject matter of this manuscript. G.C. is a founder of Samus Therapeutics and a member of its board of directors. A.G. is on a scientific advisory board for Attivare Therapeutics and receives research funding from Astellas Pharma.
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