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Genome-Wide expression under osmotic stress conditions in Saccharomyces cerevisiae

ABSTRACT: Changes in RNA levels during osmotic stress were investigated. Total RNA was extracted from a wild-type yeast strain before and after treatment with 0.4 M NaCl and the corresponding cDNAs were hybridazed on Tiling arrays. In particular, for all the intron-containing genes, the changes in the levels of intron signal in stressed cells related to the intron signal in the non-stressed cells, and the changes in the levels of exon signal in stresses cells related to the exon signal in non-stressed cells were investigated. The supplementary bar file contains the ratios between stress signals respect to non-stress signals, using the average of the 3 biological replicas.

ORGANISM(S): Saccharomyces cerevisiae

PROVIDER: GSE43236 | GEO | 2013/01/03

SECONDARY ACCESSION(S): PRJNA185134

REPOSITORIES: GEO

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Genome-Wide expression under osmotic stress conditions in Saccharomyces cerevisiae

Project description:Changes in RNA levels during osmotic stress were investigated. Total RNA was extracted from a wild-type yeast strain before and after treatment with 0.4 M NaCl and the corresponding cDNAs were hybridazed on Tiling arrays. In particular, for all the intron-containing genes, the changes in the levels of intron signal in stressed cells related to the intron signal in the non-stressed cells, and the changes in the levels of exon signal in stresses cells related to the exon signal in non-stressed cells were investigated. The supplementary bar file contains the ratios between stress signals respect to non-stress signals, using the average of the 3 biological replicas. For the tiling array experiments, total RNA was extracted from exponentially YPD growing W303-1A cells before and after treatment for 15 min with 0.4M NaCl. The hybridization of tiling array Affymetrix (GeneChipM-BM-. S. cerevisiae Tiling 1.0R Array) with cDNA produced from total RNA, was carried out according to the Affymetrix protocol and using GeneChipM-BM-. Hybridization, Wash and Stain Kit (P/N 900720). The final data were obtained from the results of three independent biological experiments. High-density tiling arrays images were normalised and analysed using the Affymetrix Tiling Analysis Software; and were visualized by the Integrated Genome Browser (Affymetrix).

2013-01-03 | E-GEOD-43236 | biostudies-arrayexpress

Discovery of pre-mRNA structural scaffold as a contributor to mammalian splicing code [In Vivo]

Project description:The specific recognition of splice signals at or near the exon-intron junctions is not explained by their weak conservation across the mammalian transcriptome and postulated to require a multitude of features embedded in the pre-mRNA strand. We explored the possibility of three-dimensional structural scaffold of a pre-mRNA guiding early spliceosomal components to the splice signal sequences. We find that mutation in non-cognate splice signal sequences of a model pre-mRNA substrate could impede recruitment of early spliceosomal components due to disruption of global structure of the pre-mRNA. We also find distribution of pre-mRNA segments potentially interacting with early spliceosomal component U1 snRNP across the intron, spatial proximity of 5′ and 3′ splice sites within the pre-mRNA scaffold, and an interplay between the structural scaffold and splicing regulatory elements in recruiting early spliceosomal components. These results suggest that early spliceosomal components could recognize a three-dimensional structural scaffold beyond the short splice signal sequences and that in our model pre-mRNA, this scaffold is formed across the intron involving the major splice signals. This work provides a conceptual base to extend our understanding of prevalence, distribution, and splicing regulatory potential of recognizable three-dimensional structural scaffolds across the mammalian transcriptome.

2021-06-23 | GSE173177 | GEO

Discovery of a pre-mRNA structural scaffold as a contributor to the mammalian splicing code [in vitro]

Project description:The specific recognition of splice signals at or near exon-intron junctions is not explained by their weak conservation and instead is postulated to require a multitude of features embedded in the pre-mRNA strand. We explored the possibility of three-dimensional structural scaffold of AdML – a model pre-mRNA substrate – guiding early spliceosomal components to the splice signal sequences. We find that mutations in the non-cognate splice signal sequences impede recruitment of early spliceosomal components due to disruption of the global structure of the pre-mRNA. We further find that the pre-mRNA segments potentially interacting with the early spliceosomal component U1 snRNP are distributed across the intron, that there is a spatial proximity of 5′ and 3′ splice sites within the pre-mRNA scaffold, and that an interplay exists between the structural scaffold and splicing regulatory elements in recruiting early spliceosomal components. These results suggest that early spliceosomal components can recognize a three-dimensional structural scaffold beyond the short splice signal sequences, and that in our model pre-mRNA, this scaffold is formed across the intron involving the major splice signals. This provides a conceptual basis to analyze the contribution of recognizable three-dimensional structural scaffolds to the splicing code across the mammalian transcriptome.

2021-06-23 | GSE173175 | GEO

Arabidopsis rosettes proteome in response to LCO and Th17 under salt stress- LC-MS/MS

Project description:Lipo-chitooligosaccharide (LCO) and thuricin 17 (Th17) are two bacterial compounds that have been shown to positively influence plant growth of both legumes and non-legumes. Arabidopsis thaliana responded positively to treatment with the bacterial signal compounds LCO and Th17 in the presence of salt stress (up to 250 mM NaCl). Shotgun proteomics of unstressed and 250 mM NaCl stressed A. thaliana rosettes (7 days post stress) in combination with the LCO and Th17 revealed many known, putative, hypothetical and unknown proteins. Overall, carbon and energy metabolic pathways were affected under both unstressed and salt stressed conditions when treated with these signals. PEP carboxylase, Rubisco-oxygenase large subunit, pyruvate kinase, and proteins of photosystem I and II were some of the noteworthy proteins enhanced by the signals, along with other stress related proteins. These findings suggest that the proteome of A. thaliana rosettes is altered by the bacterial signals tested, and more so under salt stress, thereby imparting a positive effect on plant growth under high salt stress. The roles of the identified proteins are discussed here in relation to salt stress adaptation, which, when translated to field grown crops can be a crucial component and of significant importance in agriculture and global food production.

2016-09-29 | PXD004742 | Pride

Soybean seed germination LC-MS/MS

Project description:This study aims at addressing soybean seeds (variety Absolute RR) germination, at 48h, during optimal and salt stressed condition when treated with bacterial signal compounds lipo-chitooligosaccharide (LCO) and thuricin 17 (Th17). Soybean growth is negatively affected when exposed to 40 mM NaCl and exposure to 80 mM NaCl is often lethal. When treated with the bacterial signal compounds lipo-chitooligosaccharide (LCO) and thuricin 17 (Th17), soybean seeds (variety Absolute RR) responded positively at salt stress of up to 150 mM NaCl. Shotgun proteomics of unstressed and 100 mM NaCl stressed seeds (48 h) in combination with the LCO and Th17 revealed many known, predicted, hypothetical and unknown proteins. In all, carbon, nitrogen and energy metabolic pathways were affected under both unstressed and salt stressed conditions when treated with signals. PEP carboxylase, Rubisco oxygenase large subunit, pyruvate kinase, and isocitrate lyase were some of the noteworthy proteins enhanced by the signals, along with antioxidant glutathione-S-transferase and other stress related proteins. These findings suggest that the germinating seeds alter their proteome based on bacterial signals and on stress, the specificity of this response plays a crucial role in organ maturation and transition from one stage to another in the plants life cycle; understanding this response is of fundamental importance in agriculture and, as a result, global food security.

2016-09-12 | PXD004106 | Pride

Whole-genome DNA methylation landscapes of control and heat-stressed Linum usitatissimum seedlings.

Project description:Whole-genome bisulfite sequencing (WGBS) was employed for identification of differential DNA methylation profiles among control and heat-stressed seedlings of a fibre flax (Linum usitatissimum L.) var., JRF-2. It was identified as a tolerant variety of heat stress-induced oxidative damage. High-quality genomic DNA from four samples comprised 3-week-old control and heat-stressed (40±2°C) seedlings, with or without treated with 5-Azacytidine (hypomethylating agent). High-quality and filtered paired-end Illumina reads were aligned to the flax reference genome, assembled in chromosomes, using bwa-meth tool, followed by methylation loci (5-mC) calling using the MethylDackel software. Differentially methylated regions (DMRs) between the control and other samples were identified using the methylKit and annotated using genomation package for their precedence in the promoter/exon/intron/intergenic regions. The DMRs comprised both hyper- and hypomethylated loci, but the latter found dominated due to heat stress in flax seedlings. The WGBS in flax for heat stress will provide a platform to identify epigenetic loci responsible for heat-stress adaptation in flax.

2022-04-01 | GSE185571 | GEO

The sex difference under non-stressed and chronic-stressed conditions in C57BL/6 mice

Project description:Animal models are important tools in scientific research, whereas the animals used are usually single-sex instead of mixed-sex in the experimental design. To better understand the effect of sex difference, we compared several phenotypes between male and female C57BL/6 mice, including behavioral tests, plasma corticosterone levels, adult neurogenesis, and RNA-seq. The experiments were performed under non-stressed and chronic-stressed conditions, respectively. Overall, our results showed several differences between male and female mice in sensorimotor performance while little difference was found in anxiety, depression, learning, and memory. We did not observe a significant difference in adult neurogenesis. There was a sex difference in plasma corticosterone levels under chronic stress conditions, either in 30 min after the restraint stress or after 60min of the recovery. Yet, the corticosterone levels were equivalent between the sexes under non-stressed conditions at any time point. Furthermore, the results of RNA-seq identified the differential expression genes between male and female mice under non-stressed or chronic-stressed conditions.

2022-08-22 | GSE211276 | GEO

Transcriptional and translational status of genes responding to drought stress

Project description:Transcriptional and translational status of genes responding to drought stress - Drought-stressed plants were compared to non-stressed plants, using total, polysomal or non-polysomal RNAs. Keywords: treated vs untreated comparison

2008-10-29 | GSE13366 | GEO

RNA-seq of Helicobacter pylori N6 wild-type and HP1021 deletion mutant under microaerophilic and aerobic conditions (optimal growth and oxidative stress conditions, respectively)

Project description:We performed transcriptome (RNA-seq) analyses for Helicobacter pylori N6 wild-type (WT) and HP1021 deletion mutant (ΔHP1021::aphA-3) under oxidative stress and optimal microaerobic growth conditions. The expression of 411 genes was affected by oxidative stress in stressed wild-type cells (WTS) compared to non-stressed cells (WT). Interestingly, ΔHP1021 did not respond to oxidative stress. A comparison of genes expressed in the ΔHP1021 and WT strains under optimal growth conditions revealed 191 differently expressed genes. Moreover, transcriptional changes and overall final protein levels correlated across multiple genes. The data were validated through RT-qPCR and phenotype experiments for selected processes.

2023-09-23 | E-MTAB-13025 | biostudies-arrayexpress

RNA-seq of mRNAs from spleen and bursa of Fabricius of white leghorn chickens (specific pathogen-free)

Project description:We have used RNA-seq to examine mRNAs from chicken spleen and bursa of Fabricius of three different condition (non-immunized and non-heat-stressed (24 ± 1℃ for 3 h), immunized (Newcastle disease vaccine) and non-heat-stressed, and immunized and heat-stressed (36 ± 1℃ for 3 h)). To clarify how chicken immune systems responded to heat stress with and without immunization.

2018-12-01 | GSE93224 | GEO

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