The tRNA ligase protein of Saccharomyces cerevisiae is one of the components required for splicing of yeast tRNA precursors in vitro. We have purified this protein to near homogeneity using an affinity elution chromatographic step. Purified tRNA ligase is a 90-kDa protein that, in addition to catalyzing the ligation of tRNA half-molecules in the coupled splicing reaction, will also ligate an artificial substrate. Using this artificial substrate, we provide evidence for the existence of a previously predicted activated intermediate in the ligation reaction. The amino acid sequence of the amino-terminal end of the protein was determined, and we have used this information to isolate the structural gene from a library of yeast DNA. We prove that this DNA encodes the tRNA ligase protein by DNA sequencing and by demonstrating overproduction of the protein.
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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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