To investigate the consequences of chromatin reconstitution for transcription of the human U6 gene, we assembled nucleosomes on both plasmids and linear DNA fragments containing the U6 gene. Initial experiments with DNA fragments revealed that U6 sequences located between the distal sequence element (DSE) and the proximal sequence element (PSE) lead to the positioning of a nucleosome partially encompassing these promoter elements. Furthermore, indirect end-labelling analyses of the reconstituted U6 wild-type plasmids showed strong micrococcal nuclease cuts near the DSE and PSE, indicating that a nucleosome is located between these elements. To investigate the influence that nucleosomes exert on U6 transcription, we used two different experimental approaches for chromatin reconstitution, both of which resulted in the observation that transcription of the U6 wild-type gene was enhanced after chromatin assembly. To ensure that the facilitated transcription of the nucleosomal templates is in fact due to a positioned nucleosome, we constructed mutants of the U6 gene in which the sequences between the DSE and PSE were progressively deleted. In contrast to what was observed with the wild-type genes, transcription of these deletion mutants was significantly inhibited when they were packaged into 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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