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Grr1-mediated Ubp3 degradation is crucial for HAC1 mRNA translation and unfolded stress response in yeast [Riboseq]

ABSTRACT: Grr1-mediated Ubp3 degradation is crucial for HAC1 mRNA translation and unfolded stress response in yeast [Riboseq]

PROVIDER: PRJNA1083195 | ENA |

REPOSITORIES: ENA

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Grr1-mediated Ubp3 degradation is crucial for HAC1 mRNA translation and unfolded stress response in yeast [Riboseq]

Project description:Ribosome ubiquitination induced by ribosome stalling is crucial for quality control pathways targeting mRNA, nascent polypeptides, and non-functional ribosomes. Besides quality control, Not4-mediated monoubiquitination of eS7A is crucial for the efficient translation of HAC1i mRNA in the unfolded protein response (UPR). In this study, we identified a novel E3 ligase, Grr1, an F-box protein component of the SCF ubiquitin ligase complex that is involved in Ubp3 degradation thereby HAC1i mRNA translation. Grr1 degrades Ubp3, a deubiquitinating enzyme of eS7A, under ER stress, thereby increasing eS7A ubiquitination, which facilitates HAC1i translation. Translation of HAC1i mRNA requires Grr1 and eS7 ubiquitination regardless of ER stress. ER stress-specific expression of Hac1 protein is ensured by the multi-step regulation of HAC1u mRNA, including localization on the ER membrane and stress-mediated splicing. Translation of HAC1i mRNA in UPR requires Grr1-mediated eS7 ubiquitination. More importantly, exon 1 of the HAC1i mRNA is crucial for translation activation by eS7 ubiquitination. Collectively, we propose that Grr1 upregulates eS7A monoubiquitination, thereby HAC1i translation and plays a crucial role in UPR.

2025-02-13 | GSE260736 | GEO

Grr1-mediated Ubp3 degradation is crucial for HAC1 mRNA translation and unfolded stress response in yeast [RNAseq]

2025-02-13 | GSE260735 | GEO

Grr1-mediated Ubp3 degradation is crucial for HAC1 mRNA translation and unfolded stress response in yeast [RNAseq]

Project description:Grr1-mediated Ubp3 degradation is crucial for HAC1 mRNA translation and unfolded stress response in yeast [RNAseq]

| PRJNA1083196 | ENA

Role of Hac1 in unfolded protein response in Candida parapsilosis

Project description:Role of Hac1 in unfolded protein response in Candida parapsilosis

| PRJNA491640 | ENA

Role of Hac1 in unfolded protein response in Candida parapsilosis

Project description:Investigation of the role of HAC1 using transcriptional profiling of Candida parapsilosis treated with 5 mM dithiothreitol Gene expression of wild type and hac1 deletion strains were compared during growth in YPD only and growth in YPD with 5 mM DTT

2018-10-08 | GSE120094 | GEO

Transcription profiling of Candida albicans wild type strain BWP17 and mutant hac1 treated with DTT or tunicamycin to investigate the effect of the Unfolded Protein Response of genome-wide expression patterns

Project description:Candida albicans wild type strain BWP17 and mutant hac1 were submitted either to DTT or tunicamycin, both agents being able to trigger the Unfolded Protein Response.

2008-06-11 | E-MEXP-1307 | biostudies-arrayexpress

HAC1 protein arrays

Project description:Binding of in vitro synthesized HAC1 mRNA was studied using protein microarray. 3 replicates, plus 3 reverse dye replicates An all pairs experiment design type is where all labeled extracts are compared to every other labeled extract. is_reverse: no: HAC1 mRNA Cy5 labeled; yes: HAC1 mRNA Cy3 labeled

2012-11-15 | GSE33750 | GEO

HAC1 mapping in Arabidopsis

Project description:ABSTRACT: Inorganic arsenic is a carcinogen and its ingestion in foods such as rice presents a significant risk to human health. Plants chemically reduce arsenate to arsenite. Using genome-wide association (GWA) mapping of loci controlling natural variation in arsenic accumulation in Arabidopsis thaliana allowed us to identify the arsenate reductase required for this reduction, which we named High Arsenic Content1 (HAC1). Complementation verified the identity of HAC1, and expression in Escherichia coli lacking a functional arsenate reductase confirmed the arsenate reductase activity of HAC1. The HAC1 protein accumulates in the epidermis, the outer cell layer of the root, and also in the pericycle cells surrounding the central vascular tissue. Plants lacking HAC1 lose their ability to efflux arsenite from roots, leading to both increased transport of arsenic into the central vascular tissue and on into the shoot. HAC1 therefore functions to reduce arsenate to arsenite in the outer cell layer of the root, facilitating efflux of arsenic as arsenite back into the soil to limit its accumulation in the root and transport to the shoot. Arsenate reduction by HAC1 in the pericycle may play a role in limiting arsenic loading into the xylem. Loss of HAC1 encoded arsenic reduction leads to a significant increase in arsenic accumulation in shoots causing an increased sensitivity to arsenate toxicity. We also confirmed the previous observation that the ACR2 arsenate reductase in A. thaliana plays no detectable role in arsenic metabolism. Further, ACR2 does not interact epistatically with HAC1, since arsenic metabolism in the acr2 hac1 double mutant is disrupted in an identical manner to that described for the hac1 single mutant. Our identification of HAC1 and its associated natural variation provides an important new resource for the development of low arsenic containing food stuffs such as rice.

2014-10-15 | GSE62299 | GEO

HAC1 protein arrays

2012-11-15 | E-GEOD-33750 | biostudies-arrayexpress

The unfolded protein response in fission yeast modulates stability of select mRNAs to maintain protein homeostasis

Project description:Homeostatic control mechanisms are essentil to life. One such mechanism, the unfolded protein response (UPR) operates in all eukarytic cells to adjust protein folding capacity of the endoplasmic reticulum (ER) according to need. UPR induction in all eurkarytic cells to date involves Ire1 (kinase/endonuclease transmembrane protein) mediated a non-convential splicing of Hac1/XBP1 mRNA, encoding for a potent transcription factor. UPR induction causes a comprehensive transcriptional upregulation of the folding capacity in the ER. Here we studied the global transcriptional profile of the UPR in fission yeast. Fission yeast lacks a clear homolog of Hac1/XBP1. Instead Ire1 maintains ER homeostasis through two post-transciptional programs: selective mRNA decay and processing of Bip1 mRNA (encoding for a major HS70-familiy member in the ER) thereby stabilizing it.

2012-11-21 | GSE40298 | GEO

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