The jun oncoprotein, which causes sarcomas in chickens, and the DNA-binding domain of yeast GCN4, which coordinately regulates the expression of amino acid biosynthetic genes, show significant homology. In yeast cells deleted for the GCN4 gene, GCN4 function can be conferred by a hybrid protein in which the GCN4 DNA-binding domain is replaced by the homologous region of jun. Moreover, in strains containing various mutations of the GCN4 binding site in the HIS3 promoter, HIS3 expression is affected similarly by the hybrid protein and by GCN4. These results indicate that the jun oncoprotein binds the same DNA sequences as GCN4, and strongly suggest that jun is derived from a normal cellular transcription factor (possibly AP-1, which recognizes similar sequences). This provides direct evidence for the idea that alterations in the machinery for proper gene expression can lead to the oncogenic state.
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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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