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Study of ribosome dynamics after osmotic stress in Lsm1 and Pat1 deletions


ABSTRACT: In this study, we aim to understand how the fates of stress-activated mRNAs are determined under stress conditions by isolating individual osmostress-activated mRNA species, quantitating the proteins associated in vivo with each of them, and analyzing how deletion of these proteins impact on the expression of stress-activated genes. By comparison with the proteome associated with individual not stress-related mRNA species, we show specific proteins to be preferentially binding to osmostress-activated mRNAs, notably members of the cytoplasmic Pat1 / Lsm1 – 7 complex. We evaluated the impact of this complex on the stress response by analyzing expression of osmostress-activated genes, production of osmo-protein and, mapping ribosome transit at single nucleotide resolution using 5’-phosphate sequencing of mRNAs in lsm1 and pat1 mutants. We conclude that our biochemical co-purification approach has successfully identified RNA-binding proteins with a particular role in regulating post-transcriptional expression of stress-activated mRNAs.

ORGANISM(S): Saccharomyces cerevisiae

PROVIDER: GSE107250 | GEO | 2018/07/18

REPOSITORIES: GEO

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