The Stress Granule Transcriptome Reveals Principles of mRNA Accumulation in Stress Granules.
The Stress Granule Transcriptome Reveals Principles of mRNA Accumulation in Stress Granules.
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DOI:
10.1016/j.molcel.2017.10.015
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发表时间:
2017-11-16
期刊:
影响因子:
16
通讯作者:
Parker R
中科院分区:
文献类型:
--
作者:
Khong A;Matheny T;Jain S;Mitchell SF;Wheeler JR;Parker R
Stress granules are mRNA-protein assemblies formed from nontranslating mRNAs. Stress granules are important in the stress response and may contribute to some degenerative diseases. Here we describe the stress granule transcriptome of yeast and mammalian cells through RNA-Seq analysis of purified stress granule cores and smFISH validation. While essentially every mRNA, and some ncRNAs, can be targeted to stress granules, the targeting efficiency varies from <1% to >95%. mRNA accumulation in stress granules correlates with longer coding and UTR regions and poor translatability. Quantifying the RNA-Seq analysis by smFISH reveals only 10% of bulk mRNA molecules accumulate in mammalian stress granules, and only 185 genes have more than 50% of their mRNA molecules in stress granules. These results suggest stress granules may not represent a specific biological program of mRNP assembly, but instead form by condensation of nontranslating mRNPs in proportion to their length and lack of association with ribosomes.
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