Ty3 is a Saccharomyces cerevisiae retrotransposon associated with tRNA genes. Two Ty3 elements have been cloned and characterized. The complete nucleotide sequence for one element, Ty3-2, was reported previously (L. J. Hansen, D. L. Chalker, and S. B. Sandmeyer, Mol. Cell. Biol. 9:5245-5256, 1988). However, this element is incapable of autonomous transposition. The complete DNA sequence of a transpositionally competent Ty3 element, Ty3-1, is presented here. Its sequence translates into two overlapping open reading frames, TYA3-1 and TYB3-1, which encode proteins with homology to the proteins specified by the retroviral gag and pol genes, respectively. Comparison of the Ty3-1 nucleotide sequence to Ty3-2 suggests that the TYB3-2 open reading frame of Ty3-2 is truncated by the deletion of a single nucleotide, which causes a frameshift mutation. Restoration of the reading frame with insertion of a single adenine by site-directed mutagenesis converted Ty3-2 into a transpositionally active element, Ty3-2(+ A). Western blot analysis with antibodies made against synthetic peptides identified integrase (IN) proteins in viruslike particle preparations from cells expressing Ty3 elements. Cells expressing Ty3-1 and Ty3-2 (+A) produce antibody-reactive proteins with approximate molecular masses of 61 and 58 kilodaltons (kDa), while cells expressing Ty3-2 produce reactive proteins of approximately 52 and 49 kDa. Together, these data show that the 61- or 58-kDa protein, or both, provides the integrase function of Ty3.
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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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