Project description:Profiling the transcriptome of the early stage of Arabidopsis callus induction variable_1 = root explants variable_2 = aerial organ explants variable_3 = 0 h on callus inducing medium variable_4 = 12 h on callus inducing medium variable_5 = 24 h on callus inducing medium variable_6 = 48 h on callus inducing medium variable_7 = 96 h on callus inducing medium

2012-07-22 | E-GEOD-29543 | biostudies-arrayexpress

TDRD6 instructs correct assembly of mRNPs in the chromatoid body to potentiate UPF1 dependent mRNA decay.

Project description:RNA sequencing of heterozygote or Tudor domain contian protein 6 (TDRD6) knockout round spermatid cells. Chromatoid bodies (CBs) are germ cell-specific organelles of largely unknown function. CBs harbor various RNA species, RNA-associated proteins and proteins of the tudor domain family such as TDRD6. Proteome analysis of purified CBs revealed components of the nonsense-mediated mRNA decay machinery such as UPF1. TDRD6 is essential for UPF1 localization to CBs, for UPF1-UPF2 interaction, and for assembly of UPFs and other RNA binding proteins into super-complexes. In absence of TDRD6, the association of some mRNAs with UPF1 is impaired, and the long 3â UTR-stimulated but not the exon junction complex-stimulated pathway of NMD is distorted. Reduced association of mRNAs with UPF1 correlated with increased stability and presence in polysome fractions, i.e. enhanced translational activity. Thus, we define CBs as sites of UPF1-dependent mRNA degradation and provide evidence for the requirement for NMD in spermiogenesis. This function of CBs depends on TDRD6-promoted assembly of mRNA decay enzymes within mRNPs. RNA was extracted from quadruplicate samples and libraries generated for sequencing using the NEBNext Ultra Directional RNA Library Prep Kit (New England Biolabs) at the Deep Sequencing Group SFB 655, Biotechnology Center of Technische UniversitÃ¤t Dresden. After enrichment and XP bead (Agencourt AMPure Kit; Beckman Coulter, Inc.) purification, quality control was done using Fragment AnalyzerTM (Advanced Analytical). The bar-coded libraries were equimolarly pooled and subjected to 76 bp single-end sequencing on Illumina HiSeq 2000, resulting in an average of 33 million reads per sample.

2015-12-08 | E-GEOD-63948 | biostudies-arrayexpress

Transcription profiling of Pichia pastoris strain GS115 transformed with the empty vector pGAPHIS or consitutively overproducing the activated form of S. cerevisiae Hac1

Project description:Strain GS115 transformed with the empty vector pGAPHIS (a histidine prototrophic isogenic strain of GS115) was compared to Strain GS115 HAC1, constitutively overproducing the activated form of S. cerevisiae Hac1

2008-09-23 | E-MEXP-1616 | biostudies-arrayexpress

Transcriptomic analysis of Helicobacter pylori 26695 exposed to lethal concentration of a bactericidal inhibitor of the essential response regulator HsrA

Project description:Helicobacter pylori, a pathogenic member of phylum Campylobacterota (formerly Epsilonproteobacteria), is recognized as the leading cause of several human gastric pathologies, including acute and chronic gastritis, peptic ulcer disease, gastric adenocarcinoma, and gastric mucosa-associated lymphoid tissue (MALT) lymphoma. In the last two decades, the alarming increase of the antibiotic resistance levels to first-line and even “rescue” antibiotics, especially clarithromycin, metronidazole and levofloxacin, has led to a marked decrease of the eradication rates of traditional therapies. In previous works, we have validated the essential protein HsrA as an effective therapeutic target for H. pylori infection. HsrA is an OmpR/PhoB-type orphan response regulator, unique and highly conserved in members of phylum Campylobacterota, which appears involved in a variety of crucial physiological processes. In the present work, we carried out a transcriptomic analysis in order to discern the global effects of lethal concentrations of a bactericidal HsrA inhibitor on the H. pylori physiology. Treatment with the bactericidal HsrA inhibitor significantly changed the transcript levels of 367 open reading frames (ORF), of which 212 genes appeared upregulated and 155 genes resulted in downregulation, as compared with control samples. Thus, in vivo HsrA inhibition influenced, directly or indirectly, the expression of 23% of ORFs encoded by the H. pylori 26696 genome. Among the 268 differentially expressed genes (DEGs) with defined functions, two functional categories were highly enriched with downregulated genes involved in essential physiological processes: (1) ribosome biogenesis, and (2) electron transfer and oxidative phosphorylation.

2024-09-21 | E-MTAB-14255 | biostudies-arrayexpress

Transcription profiling of Salmonella enterica serovar Typhimurium SL1344 wild type and igaA, rcsB, rcsC, rcsD and rcsA mutants

Project description:Comparison of transcriptomic analysis of a Salmonella enterica serovar Typhimurium SL1344 (wild-type) and isogenic mutant igaA1

2009-05-01 | E-MEXP-1612 | biostudies-arrayexpress

Transcription profiling of Pichia pastoris treated with dithiothereitol to induce unfolded protein response

Project description:Experiment aims to induce unfolded protein response in Pichia pastoris, set-up was chosen to be comparable results to DTT experiment.

2008-09-23 | E-MEXP-1615 | biostudies-arrayexpress

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