Reversible amyloids of pyruvate kinase couple cell metabolism and stress granule disassembly

Item Type:	Article
Title:	Reversible amyloids of pyruvate kinase couple cell metabolism and stress granule disassembly
Creators Name:	Cereghetti, G. and Wilson-Zbinden, C. and Kissling, V.M. and Diether, M. and Arm, A. and Yoo, H. and Piazza, I. and Saad, S. and Picotti, P. and Drummond, D.A. and Sauer, U. and Dechant, R. and Peter, M.
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.
Keywords:	Adenosine Triphosphate, Amyloid, Cell Cycle Proteins, Cytoplasmic Granules, Fructosediphosphates, HSP70 Heat-Shock Proteins, Heat-Shock Proteins, Physiological Stress, Pyruvate Kinase, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins
Source:	Nature Cell Biology
ISSN:	1465-7392
Publisher:	Nature Publishing Group
Volume:	23
Number:	10
Page Range:	1085-1094
Date:	October 2021
Additional Information:	Erratum in: Nat Cell Biol (2021).
Official Publication:	https://doi.org/10.1038/s41556-021-00760-4
PubMed:	View item in PubMed

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