Search results for "Transcription factories"

showing 4 items of 4 documents

Iwr1 facilitates RNA polymerase II dynamics during transcription elongation.

2017

Iwr1 is an RNA polymerase II (RNPII) interacting protein that directs nuclear import of the enzyme which has been previously assembled in the cytoplasm. Here we present genetic and molecular evidence that links Iwr1 with transcription. Our results indicate that Iwr1 interacts with RNPII during elongation and is involved in the disassembly of the enzyme from chromatin. This function is especially important in resolving problems posed by damage-arrested RNPII, as shown by the sensitivity of iwr1 mutants to genotoxic drugs and the Iwr1's genetic interactions with RNPII degradation pathway mutants. Moreover, absence of Iwr1 causes genome instability that is enhanced by defects in the DNA repair…

0301 basic medicineTranscription factoriesCytoplasmSaccharomyces cerevisiae ProteinsDNA RepairTranscription GeneticBiophysicsActive Transport Cell NucleusRNA polymerase IISaccharomyces cerevisiaeBiochemistryGenomic Instability03 medical and health sciencesStructural BiologyGeneticsMolecular BiologyRNA polymerase II holoenzymePolymeraseCell NucleusbiologyGeneral transcription factorMolecular biologyChromatinCell biology030104 developmental biologybiology.proteinTranscription factor II FRNA Polymerase IITranscription factor II DCarrier ProteinsTranscription factor II BDNA DamageBiochimica et biophysica acta. Gene regulatory mechanisms
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Chromatin-dependent regulation of RNA polymerases II and III activity throughout the transcription cycle

2015

The particular behaviour of eukaryotic RNA polymerases along different gene regions and amongst distinct gene functional groups is not totally understood. To cast light onto the alternative active or backtracking states of RNA polymerase II, we have quantitatively mapped active RNA polymerases at a high resolution following a new biotin-based genomic run-on (BioGRO) technique. Compared with conventional profiling with chromatin immunoprecipitation, the analysis of the BioGRO profiles in Saccharomyces cerevisiae shows that RNA polymerase II has unique activity profiles at both gene ends, which are highly dependent on positioned nucleosomes. This is the first demonstration of the in vivo infl…

Transcription factoriesSaccharomyces cerevisiae ProteinsTranscription Elongation GeneticTranscription GeneticRNA polymerase II28Saccharomyces cerevisiaeBiology03 medical and health scienceschemistry.chemical_compoundTranscripció genèticaRNA polymeraseGeneticsRNA polymerase IRNA polymerase II holoenzyme9030304 developmental biologyGenetics0303 health sciencesGeneral transcription factorGene regulation Chromatin and Epigenetics030302 biochemistry & molecular biologyRNA Polymerase IIIGenomicsNucleosomesCell biologychemistryTranscription Termination Geneticbiology.proteinRNARNA Polymerase IIGenome FungalTranscription factor II DSmall nuclear RNA
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A complete set of nascent transcription rates for yeast genes

2010

The amount of mRNA in a cell is the result of two opposite reactions: transcription and mRNA degradation. These reactions are governed by kinetics laws, and the most regulated step for many genes is the transcription rate. The transcription rate, which is assumed to be exercised mainly at the RNA polymerase recruitment level, can be calculated using the RNA polymerase densities determined either by run-on or immunoprecipitation using specific antibodies. The yeast Saccharomyces cerevisiae is the ideal model organism to generate a complete set of nascent transcription rates that will prove useful for many gene regulation studies. By combining genomic data from both the GRO (Genomic Run-on) a…

Transcription factoriesSaccharomyces cerevisiae ProteinsTranscription GeneticRNA StabilityGenes FungalDNA transcriptionlcsh:MedicineYeast and Fungal ModelsRNA polymerase IISaccharomyces cerevisiaeBiologyBiochemistryGenètica molecularchemistry.chemical_compoundSaccharomycesModel OrganismsMolecular cell biologyTranscripció genèticaGene Expression Regulation FungalRNA polymeraseGeneticsRNA MessengerRNA synthesislcsh:ScienceBiologyRNA polymerase II holoenzymeGeneticsMultidisciplinaryGeneral transcription factorGene Expression Profilinglcsh:RPromoterGenomicsChromatinFunctional GenomicsNucleic acidsGenòmicaRNA processingchemistrybiology.proteinRNAlcsh:QRNA Polymerase IIGene expressionTranscription factor II DTranscription factor II BResearch Article
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Genome-wide studies of mRNA synthesis and degradation in eukaryotes

2012

In recent years, the use of genome-wide technologies has revolutionized the study of eukaryotic transcription producing results for thousands of genes at every step of mRNA life. The statistical analyses of the results for a single condition, different conditions, different transcription stages, or even between different techniques, is outlining a totally new landscape of the eukaryotic transcription process. Although most studies have been conducted in the yeast Saccharomyces cerevisiae as a model cell, others have also focused on higher eukaryotes, which can also be comparatively analyzed. The picture which emerges is that transcription is a more variable process than initially suspected,…

Transcription factoriesTranscription GeneticRNA StabilityBiophysicsE-boxRNA polymerase IISaccharomyces cerevisiaeBiochemistryGenètica molecularFungal ProteinsStructural BiologyBacterial transcriptionP-bodiesGeneticsRNA MessengerMolecular BiologyRNA polymerase II holoenzymeGeneticsGenomebiologyGeneral transcription factorEukaryotic transcriptionGenòmicaEukaryotic CellsGene Expression Regulationbiology.proteinRNA
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