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Updated: Dec 16, 2025

Methods to Classify Cytoplasmic Foci as Mammalian Stress Granules
Published on: May 12, 2017
Conserved metabolite regulation of stress granule assembly via AdoMet
Kyle Begovich1,2, Anthony Q Vu3,4,5, Gene Yeo3,4,5
1Howard Hughes Medical Institute, Summer Institute Marine Biological Laboratory, Woods Hole, MA.
Abstract:
Stress granules (SGs) are evolutionarily conserved condensates of ribonucleoproteins that assemble in response to metabolic stresses. Because aberrant SG formation is associated with amyotrophic lateral sclerosis (ALS), understanding the connection between metabolic activity and SG composition can provide therapeutic insights into neurodegeneration. Here, we identify 17 metabolic enzymes recruited to yeast SGs in response to physiological growth stress. Furthermore, the product of one of these enzymes, AdoMet, is a regulator of SG assembly and composition. Decreases in AdoMet levels increase SG formation, while chronic elevation of AdoMet produces SG remnants lacking proteins associated with the 5' end of transcripts. Interestingly, acute elevation of AdoMet blocks SG formation in yeast and motor neurons. Treatment of ALS-derived motor neurons with AdoMet also suppresses the formation of TDP-43-positive SGs, a hallmark of ALS. Together, these results argue that AdoMet is an evolutionarily conserved regulator of SG composition and assembly with therapeutic potential in neurodegeneration.
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