In Saccharomyces cerevisiae the expression of the cargB gene (coding for ornithine aminotransferase) is submitted to dual regulation: an induction by allophanate and a specific induction process by arginine. We have determined the nucleotide sequence of the cargB gene along with its 5' region. The coding portion of the gene encodes a protein of 423 amino acid residues with a calculated Mr value of 46049. To characterize further the regulatory mechanisms modulating the expression of the gene we have analyzed fusions of several fragments of the 5' non-coding region to lacZ, compared the 5' sequences of the cargA (coding for arginase) and cargB coregulated genes and determined the nature of two constitutive cis-dominant mutations affecting the arginine control. These approaches allowed us to define three domains in the 5' non-coding region. The upstream one is implicated in the induction by allophanate. The two other domains are involved in the specific control by arginine; the target of the ARGR gene products, that mediate a positive regulation by arginine, lies upstream of another site where a repression by the CARGRI molecule occurs. The constitutive cargB+O- mutations are located in this repressor domain. The 5' non-coding region of cargA presents the same two-domain organization. These two domains contain three sequences homologous to the cargA and cargB 5' regions.
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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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