The supply of nitrogen regulates yeast genes affecting nitrogen catabolism, pseudohyphal growth, and meiotic sporulation. Ure2p of Saccharomyces cerevisiae is a negative regulator of nitrogen catabolism that inhibits Gln3p, a positive regulator of DAL5, and other genes of nitrogen assimilation. Dal5p, the allantoate permease, allows ureidosuccinate uptake (Usa(+)) when cells grow on a poor nitrogen source such as proline. We find that overproduction of Mks1p allows uptake of ureidosuccinate on ammonia and lack of Mks1p prevents uptake of ureidosuccinate or Dal5p expression on proline. Overexpression of Mks1p does not affect cellular levels of Ure2p. An mks1 ure2 double mutant can take up ureidosuccinate on either ammonia or proline. Moreover, overexpression of Ure2p suppresses the ability of Mks1p overexpression to allow ureidosuccinate uptake on ammonia. These results suggest that Mks1p is involved in nitrogen control upstream of Ure2p as follows: NH(3) dash, vertical Mks1p dash, vertical Ure2p dash, vertical Gln3p --> DAL5. Either overproduction of Mks1p or deletion of MKS1 interferes with pseudohyphal growth.
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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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