The PH081 gene product functions as an inhibitor of the cyclin-cyclin-dependent kinase pair, Pho80-Pho85, and is required for derepression of acid phosphatase-encoding gene (PH05) expression. PH081 is the only known regulator of this system whose transcriptional expression is regulated by the level of inorganic phosphate. This effect is mediated by the gene products of the PH04 and PH02 (BAS2, GRF10) genes which act as transcription factors. Fine structural analysis of the PH081 promoter region has revealed the existence of a negative regulatory sequence (NRS). That is, removal of this element causes an approx. 4-fold increase in PH081 expression. The NRS functions in either orientation, but only when located downstream from activation sequences. Interestingly, this element shows significant homology to a sequence present in the promoter of the PH08 gene, encoding a phosphate-repressible alkaline phosphatase. An electrophoretic mobility shift assay (EMSA) using whole-cell extracts and a NRS-containing DNA fragment detects a protein which specifically binds to this element.
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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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