The product of the nuclear Saccharomyces cerevisiae gene PET54 is specifically required, along with at least two other nuclear gene products, for translation of the mitochondrial mRNA encoding subunit III of cytochrome c oxidase (coxIII). We have genetically mapped PET54 (to the right arm of chromosome VII, 4.8 cM centromere-distal to SUF15), and have biochemically characterized the gene and its product. We determined the nucleotide sequence of a 1.6-kb DNA fragment carrying PET54 and identified the PET54 reading frame by determining the sequence of an ochre mutant allele as well as frameshift and frameshift-revertant alleles of the gene. The wild-type PET54 gene encodes a slightly basic 293-amino acid protein. PET54 is expressed from two mRNAs, both with unusual features: a major transcript with an extremely short 5'-untranslated leader, and a minor transcript with a relatively long 5'-leader carrying three short open reading frames. Antiserum raised against a trpE-PET54 fusion protein was used to probe subcellular fractions. These experiments showed that the PET54 protein is specifically associated with mitochondria, suggesting that it is likely to act directly in coxIII translation.
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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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