The functional relationship of nucleosome positioning and gene expression is not known. Using high-copy plasmids, containing the yeast phosphate-repressible acid phosphatase gene (PHO5) and the TRP1/ARS1 vector system, I have determined the nucleosomal structure of the 5' region of the PHO5 gene and demonstrated that the nucleosomal positioning of this region is independent of orientation or position in the various plasmid constructions utilized. However, deletion of a 278-base pair BamHI-ClaI fragment from the 5'-flanking sequences of the PHO5 gene causes the nucleosome positioning to become dependent on orientation or position in the plasmids tested. Use of PHO5-CYC1-lACZ fusions have demonstrated that this DNA fragment contains the sequences responsible for the transcriptional regulation of the PHO5 gene in response to the level of phosphate in the growth media. The nucleosome positioning in the 5' region of PHO5 may be determined by an interaction with the sequences or machinery responsible for transcriptional regulation of the gene.
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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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