Saccharomyces cerevisiae Ssy1p is a membrane protein which senses extracellular amino acids and controls the expression of certain amino acid permease genes. Analysis by DNA micro-array newly identified DIP5 and MUP1 as the positive targets and CAN1, PUT4 and GAP1 as the negative targets under Ssy1p control. Interestingly, the effect of ssy1 deletion was not restricted to amino acid permease genes: the expression of nitrogen catabolite repression (NCR)-sensitive genes and methionine-biosynthesizing genes ( MET genes) was derepressed by the deletion of SSY1. Constitutive overexpression of the genes for glutamine permease ( GNP1) or methionine permease ( MUP1) enhanced the assimilation of glutamine or methionine in the ssy1Delta strain but could not fully suppress the derepression of the NCR-sensitive genes or MET genes. This result suggests that Ssy1p regulates not only the transcription of amino acid permease genes, but also transcription of many other nitrogen-metabolizing genes.
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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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