The mechanism and kinetics of RNA polymerase II transcription and histone acetylation were studied by chromatin immunoprecipitation in yeast. Our results indicate that a significant fraction of polymerases starting transcription never make it to the end of a long GAL-VPS13 fusion gene. Surprisingly, induction of GAL genes results in substantial loss of histone-DNA contacts not only in the promoter but also in the coding region. The loss of nucleosomes is dependent on active transcript elongation, but apparently occurs independently of histone acetylation. In contrast, histones in genes previously shown to require the histone acetyltransferases GCN5 and ELP3 for normal transcription do not lose DNA contacts, but do become acetylated as a result of transcription. Together, these results suggest the existence of at least two distinct mechanisms to achieve efficient transcript elongation through chromatin: a pathway based on loss of histone-DNA contacts, and a histone acetylation-dependent mechanism correlating with little or no net loss of nucleosomes.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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