Yeast tRNA ligase is one of two proteins required for the splicing of precursor tRNA molecules containing introns. The 95-kDa tRNA ligase has been purified to homogeneity from a strain of Escherichia coli which overexpresses the protein. The ligation reaction requires three enzymatic activities: phosphodiesterase, polynucleotide kinase, and ligase. By partial proteolytic digestion, we have produced fragments of tRNA ligase which contain the constituent activities. These results provide evidence for a model in which the three constituent activities of ligase are located in three distinct domains separated by protease-sensitive regions. We have also located the active adenylylated site in the ligase domains. It is lysine-114. The tRNA ligase sequence in this region has limited homology to the active-site region of T4 RNA ligase.
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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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