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Updated: Sep 5, 2025

Methods to Classify Cytoplasmic Foci as Mammalian Stress Granules
Published on: May 12, 2017
mRNAs sequestered in stress granules recover nearly completely for translation
Sarada Das1, Leonardo Santos1, Antonio Virgilio Failla2
1Institute of Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany.
Abstract:
Stress granules (SGs) are membrane-less condensates composed of RNA and protein that assemble in response to stress stimuli and disassemble when stress is lifted. Both assembly and disassembly are tightly controlled processes, yet, it remains elusive whether mRNAs in SGs completely recover for translation following stress relief. Using RNA-seq of translating fractions in human cell line, we found that higher fraction of the m6A-modified mRNAs recovered for translation compared to unmodified mRNAs, i.e. 95% vs 84%, respectively. Considering structural mRNA analysis, we found that the m6A modification enhances structuring at nucleotides in its close vicinity. Our results suggest that SG-sequestered mRNAs disassemble nearly completely from SGs and the m6A modification may display some advantage to the mRNAs in their recovery for translation likely by m6A-driven structural stabilization.
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