ULT1 and CLF function antagonistically as epigenetic regulators of gene expression in Arabidopsis. We sought to identity their global downstream target genes at two stages of plant development and determine their common targets.
The Trithorax Group Factor ULTRAPETALA1 Regulates Developmental as Well as Biotic and Abiotic Stress Response Genes in Arabidopsis.
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View SamplesPlants respond to changes in the red:far red ratio (R:FR) of incident light. A reduction in this ratio (increase in FR) results in the Shade Avoidance Response (SAR) with associated changes in gene expression. The Phyotchrome-Interacting Factors (PIFs) are bHLH transcription factors known to be involved in the SAR. An analysis of changes in gene expression in WT and quadruple pif1pif3pif4pif5 (pifq; Leivar et al., 2008 (PMID 19920208)) mutant seedlings in response to an increase in FR should identify primary targets of PIF signaling.
Dynamic antagonism between phytochromes and PIF family basic helix-loop-helix factors induces selective reciprocal responses to light and shade in a rapidly responsive transcriptional network in Arabidopsis.
Specimen part
View SamplesLight initiates the seedling deetiolation transition by promoting major changes in gene expression mainly regulated by phytochrome (phy) photoreceptors. During the initial dark-to-light transition, phy photoactivation induces rapid changes in gene expression that eventually lead to the photomorphogenic development. Recent reports indicate that this process is achieved by phy-induced degradation of Phy-Interacting bHLH transcription Factors (PIFs) PIF1, PIF3 PIF4 and PIF5, which are partly redundant constitutive repressors of photomorphogenesis that accumulate in darkness. In order to test whether light/phy-regulated gene expression occurs through these PIFs, we have performed whole-genome expression analysis in the pif1pif3pif4pif5 quadruple mutant (pifq).
Definition of early transcriptional circuitry involved in light-induced reversal of PIF-imposed repression of photomorphogenesis in young Arabidopsis seedlings.
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View SamplesTHO2 and HPR1 proteins were co-depleted from Drosophila S2 cells and their role in mRNA export analysed by comparing total RNA and cytoplasmic RNA
The superhelical TPR-repeat domain of O-linked GlcNAc transferase exhibits structural similarities to importin alpha.
Cell line
View SamplesGlobal gene expression data from 7-day old light-grown liquid cultured seedlings treated with or without auxin (5M IAA) for 2 h.
AUXIN RESPONSE FACTOR 2 (ARF2): a pleiotropic developmental regulator.
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View SamplesGlobal gene expression data from 7-day old light-grown liquid cultured seedlings treated with or without auxin (5M IAA) for 2 h. Columbia (WT), IAA17 loss of function mutant allele (iaa17-2), IAA17 gain of function mutant allele (axr3-1) and iaa5 iaa6 iaa19 triple loss of function mutant allele (i5i6i19) were used for this study. Each experimental condition has three true replicates for a total of 24 hybridizations. Data
Functional genomic analysis of the AUXIN/INDOLE-3-ACETIC ACID gene family members in Arabidopsis thaliana.
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View SamplesRNA samples were extracted from liquid cultured seedlings treated with or without auxin (5M IAA) for 2 h.
Functional genomic analysis of the AUXIN RESPONSE FACTOR gene family members in Arabidopsis thaliana: unique and overlapping functions of ARF7 and ARF19.
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View SamplesGlobal gene expression data from 7-day old light-grown liquid cultured seedlings treated with or without auxin (5M IAA) for 2 h. Columbia (WT) and Auxin response factor 2 (ARF2) T-DNA insertion mutant (arf2-6 ) were used for this study. Each experimental condition has three true replicates for a total of 12 hybridizations.
AUXIN RESPONSE FACTOR 2 (ARF2): a pleiotropic developmental regulator.
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View SamplesWe show that key regulators of oxidative metabolism, the Estrogen Related Receptors (ERRs) and the PGC-1 co-activators, are transiently induced during somatic cell reprogramming. Bioenergetic assays reveal that while glycolysis increases throughout the reprogramming transition, the early stages feature a transient oxidative phosphorylation (OXPHOS) burst. Up-regulation of ERRa or ? is a prerequisite for the OXPHOS burst in human and mouse cells, respectively, and failure to induce this metabolic switch collapses the reprogramming process. We identify a Sca1-/CD34- sub-population of early reprogramming cells with enhanced ERR? and PGC-1ß expression as bona fide reprogramming progenitors. Transcriptional profiling confirmed that these progenitors have undergone extensive metabolic reprogramming. These studies characterize a previously unrecognized, ERR-dependent metabolic switch prior to establishment of induced pluripotency.
No associated publication
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View SamplesBackground: Moderate hypothermia (32oC for 12 72 hours) has therapeutic applications, but the mechanisms by which it affects cellular function are unclear. We tested the hypothesis that moderate hypothermia produces broad changes in gene expression by human cells at the level of mRNA.
Effect of moderate hypothermia on gene expression by THP-1 cells: a DNA microarray study.
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