Expression of the URA3 gene of Saccharomyces cerevisiae was studied by analysis of URA3-lacZ gene fusions constructed in vitro. Synthesis of hybrid beta-galactosidase by fusions in frame with the coding sequence for orotidine-5'-phosphate decarboxylase (OMPdecarboxylase) was found to be normally regulated even when only 11 nucleotides of URA3 coding sequence remained, indicating that all transcription initiation and regulatory sites are present at the beginning of the URA3 gene. An upstream initiator codon that begins a short overlapping coding sequence in another reading frame was also found to be active in producing hybrid beta-galactosidase. However this beta-galactosidase synthesis showed little or no regulation. Nuclease protection experiments revealed numerous species of URA3 mRNA. The regulation of these is consistent with the idea that the URA3 protein and the overlapping peptide are translated from differentially regulated mRNAs of different lengths.
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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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