The first cDNA for the translational release factor eRF1 of ciliates was cloned from Tetrahymena thermophila. The coding frame contained one UAG and nine UAA codons that are reassigned for glutamine in Tetrahymena. The deduced protein sequence is 57% identical to human eRF1. The recombinant Tetrahymena eRF1 purified from a yeast expression system was able to bind to yeast eRF3 as do other yeast or mammalian eRF1s as a prerequisite step for protein termination. The recombinant Tetrahymena eRF1, nevertheless, failed to catalyze polypeptide termination in vitro with rat or Artemia ribosomes, at least in part, due to less efficient binding to the heterologous ribosomes. Stop codon specificity and phylogenetic significance of Tetrahymena eRF1 are discussed from the conservative protein feature.
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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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