The URA4 gene of Saccharomyces cerevisiae, coding for the third enzyme of the pyrimidine pathway, has been cloned through phenotypic complementation of a ura4 mutant of S. cerevisiae. Subcloning of an original 9 kb DNA fragment, carrying the yeast URA4 gene, allowed us to localize the gene on a 2 kb ClaI--BamHI fragment. The sequence of the URA4 structural gene and surrounding DNA was determined by the dideoxynucleotide chain termination method. The URA4 gene encodes a dihydroorotase subunit of calculated molecular weight 40,600. S1 nuclease mapping indicated that transcription of URA4 is initiated at four major start sites located at positions -41, -30, -22 and -18. A set of potentially significant sequences was identified in the 5' OH non-coding region of the gene. The deduced amino acid sequence of dihydroorotase was examined and compared with homologous amino acid sequences of Salmonella typhimurium, Escherichia coli and Drosophila melanogaster. S. cerevisiae dihydroorotase shows 40% homology with the S. typhimurium and E. coli enzymes and 23% homology with the D. melanogaster enzyme. A potential active site has been predicted for dihydroorotase from these comparisons.
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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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