This SuperSeries is composed of the SubSeries listed below.
CD28-inducible transcription factor DEC1 is required for efficient autoreactive CD4+ T cell response.
Specimen part, Treatment
View SamplesWe used microarrays to detail the global gene transcription underlying T cells activation during the first 24 hours after stimulation.
CD28-inducible transcription factor DEC1 is required for efficient autoreactive CD4+ T cell response.
Specimen part, Treatment
View SamplesWe used microarrays to detail the global gene transcription effect of Dec1 underlying T cells activation during the first 24 hours after stimulation.
CD28-inducible transcription factor DEC1 is required for efficient autoreactive CD4+ T cell response.
Specimen part, Treatment
View SamplesLow oxygen stress dynamically regulates the translation of cellular mRNAs as a means of energy conservation in seedlings of Arabidopsis thaliana. Most of the highly hypoxia-induced mRNAs are recruited to polysomes and actively translated, whereas other cellular mRNAs become translationally inactive and are either targeted for stabilization or degradation. Here we identify the involvement of OLIGOURIDYLATE BINDING PROTEIN 1 (UBP1), a triple RNA Recognition Motif protein, in dynamic and reversible aggregation of translationally repressed mRNAs during hypoxia. Mutation or downregulation of UBP1C interferes with seedling establishment and reduces survival of low oxygen stress. By use of messenger ribonucleoprotein immunopurification, we show that UBP1C constitutively binds a subpopulation of mRNAs characterized by U-rich 3-untranslated regions under normoxic conditions. During hypoxia, UBP1C association with non-U-rich mRNAs is enhanced concomitant with its aggregation into microscopically visible cytoplasmic foci, referred to as UBP1 stress granules (SGs). This UBP1C-mRNA association occurs as global levels of protein synthesis decline. Upon reoxygenation, rapid UBP1 SG disaggregation coincides with the return of the stabilized mRNAs to polysomes. The mRNAs that are highly induced and translated during hypoxia largely circumvent UBP1C sequestration. Thus, UBP1 is established as a component of dynamically assembled cytoplasmic mRNPs that sequester mRNAs that are poorly translated during a transient low energy stress.
Selective mRNA sequestration by OLIGOURIDYLATE-BINDING PROTEIN 1 contributes to translational control during hypoxia in Arabidopsis.
Specimen part, Disease, Treatment
View SamplesMicroarray experiment with polysomal and non-polysomal RNAs extracted under non-stress and mild-dehydration stress.
mRNA sequence features that contribute to translational regulation in Arabidopsis.
No sample metadata fields
View SamplesTranscriptome, translatome, and CSP1 RNA regulon analysis of 25-d-o Arabidopsis rosettes exposed to 12h low temperature (4C) treatment.
Cold shock protein 1 chaperones mRNAs during translation in Arabidopsis thaliana.
Age, Specimen part, Treatment
View Samples7d-old WT ler seedlings were submitted to 12h of non-stress (air) or hypoxia-stress treatment under low light conditions (45 uM m-2 s-2), and Total and Large Polysome RNA from both treatments were extracted and hybridized against Affymetrix genome chips. Values were used to evaluate changes in transcript abundance and transcript association with large polysomal complexes.
Genome-wide analysis of transcript abundance and translation in Arabidopsis seedlings subjected to oxygen deprivation.
No sample metadata fields
View SamplesGene expression analysis of 7d-old Arabidopsis seedlings exposed to short term (2 h) hypoxia, long term (9 h) hypoxia, and 1 h reoxygenation after long term (9 h) hypoxia to evaluate the regulation of gene expression at the level of translation.
Selective mRNA translation coordinates energetic and metabolic adjustments to cellular oxygen deprivation and reoxygenation in Arabidopsis thaliana.
Age
View SamplesMPK6 shows transient increase in activity under hypoxia with maximal activity at 2 hrs. To study the role of MPK6 in hypoxia in Arabidopsis, 10 do seedlings of WT, mpk6 and MPK6 plants were exposed to 2 hrs hypoxia and 2hr air (mock).
Transient MPK6 activation in response to oxygen deprivation and reoxygenation is mediated by mitochondria and aids seedling survival in Arabidopsis.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Profiling translatomes of discrete cell populations resolves altered cellular priorities during hypoxia in Arabidopsis.
Age, Specimen part, Treatment
View Samples