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Reversible amyloids of pyruvate kinase couple cell metabolism and stress granule disassembly.
- Source :
-
Nature cell biology [Nat Cell Biol] 2021 Oct; Vol. 23 (10), pp. 1085-1094. Date of Electronic Publication: 2021 Oct 06. - Publication Year :
- 2021
-
Abstract
- Cells respond to stress by blocking translation, rewiring metabolism and forming transient messenger ribonucleoprotein assemblies called stress granules (SGs). After stress release, re-establishing homeostasis and disassembling SGs requires ATP-consuming processes. However, the molecular mechanisms whereby cells restore ATP production and disassemble SGs after stress remain poorly understood. Here we show that upon stress, the ATP-producing enzyme Cdc19 forms inactive amyloids, and that their rapid re-solubilization is essential to restore ATP production and disassemble SGs in glucose-containing media. Cdc19 re-solubilization is initiated by the glycolytic metabolite fructose-1,6-bisphosphate, which directly binds Cdc19 amyloids, allowing Hsp104 and Ssa2 chaperone recruitment and aggregate re-solubilization. Fructose-1,6-bisphosphate then promotes Cdc19 tetramerization, which boosts its activity to further enhance ATP production and SG disassembly. Together, these results describe a molecular mechanism that is critical for stress recovery and directly couples cellular metabolism with SG dynamics via the regulation of reversible Cdc19 amyloids.<br /> (© 2021. The Author(s), under exclusive licence to Springer Nature Limited.)
- Subjects :
- Adenosine Triphosphate metabolism
Cell Cycle Proteins genetics
Cell Cycle Proteins metabolism
Fructosediphosphates metabolism
HSP70 Heat-Shock Proteins genetics
HSP70 Heat-Shock Proteins metabolism
Heat-Shock Proteins genetics
Heat-Shock Proteins metabolism
Pyruvate Kinase chemistry
Pyruvate Kinase genetics
Saccharomyces cerevisiae genetics
Saccharomyces cerevisiae growth & development
Saccharomyces cerevisiae Proteins chemistry
Saccharomyces cerevisiae Proteins genetics
Amyloid chemistry
Cell Cycle Proteins chemistry
Cytoplasmic Granules chemistry
Pyruvate Kinase metabolism
Saccharomyces cerevisiae metabolism
Saccharomyces cerevisiae Proteins metabolism
Stress, Physiological
Subjects
Details
- Language :
- English
- ISSN :
- 1476-4679
- Volume :
- 23
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Nature cell biology
- Publication Type :
- Academic Journal
- Accession number :
- 34616026
- Full Text :
- https://doi.org/10.1038/s41556-021-00760-4