The activity profile of the periplasmic asparaginase of Saccharomyces cerevisiae was determined during cell growth in an ure2 mutant; in an ure2 transformed with a plasmid containing the gene URE2 and, for comparison, in the strain D273-10B. Cells were cultivated in media presenting variable quantitative and qualitative nitrogen availability and the enzyme activity was evaluated in fresh and in nitrogen-starved cells. Nitrogen affected the asparaginase II level in fresh and starved cells of all strains. In the best condition, enzyme was produced by the wild-type cells at the late log-phase in the glucose/ammonium medium with a carbon to nitrogen ratio 4.3:1. Upon starvation, the activity doubled. The overall profile of the transformed strain was similar to that of the wild-type strain. In the ure2 mutant, high-enzyme levels were observed during growth, as expected. However the activity level, upon starvation, in proline grown cells, increased sixfold, suggesting that in addition to the Ure2p-Gln3p system, another system regulates asparaginase II biosynthesis.
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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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