Arginase, the enzyme responsible for arginine degradation in Saccharomyces cerevisiae, is an inducible protein whose inhibition of ornithine carbamoyl-transferase has been studied extensively. Mutant strains defective in the normal regulation of arginase production have also been isolated. However, in spite of these studies, the macromolecular biosynthetic events involved in production of arginase remain obscure. We have, therefore, studied the requirements of arginase induction. We observed that: (i) 4 min elapsed between the addition of inducer (homoarginine) and the appearance of arginase activity at 30 degrees C; (ii) induction required ribonucleic acid synthesis and a functional rna1 gene product; and (iii) production of arginase-specific synthetic capacity occurred in the absence of protein synthesis but could be expressed only when protein synthesis was not inhibited. Termination of induction by inducer removal, addition of the ribonucleic acid synthesis inhibitor lomofungin, or resuspension of a culture of organisms containing temperature-sensitive rna1 gene products in a medium at 35 degrees C resulted in loss of ability for continued arginase synthesis with half-lives of 5.5, 3.8, and 4.5 min, respectively. These and other recently published data suggest that a variety of inducible or repressible proteins responding rapidly to the environment may be derived from labile synthetic capacities, whereas constitutively produced proteins needed continuously throughout the cell cycle may be derived from synthetic capacities that are significantly more stable.
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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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