A mutation resulting in inducer-independent expression of the proline-degradative enzymes was isolated in the yeast Saccharomyces cerevisiae. Strains carrying the mutation, put3, are partially constitutive for proline oxidase and delta 1-pyrroline-5-carboxylate dehydrogenase when grown on a medium lacking proline and are hyperinducible for both enzyme activities when grown on a proline-containing medium. put3 segregates as a single nuclear gene, is not linked to either of the presumed structural genes for proline oxidase and delta 1-pyrroline-5-carboxylate dehydrogenase, and does not affect proline transport. When heterozygous in diploid strains, put3 behaves neither fully dominant nor fully recessive. Endogenous induction by proline has been eliminated as a cause of the inducer-independent enzyme expression in the put3 mutant and the mutation is believed to be in a regulatory component of the proline-degradative pathway.
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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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