We have successfully applied a strategy based on the "cyberscreening" of the expressed sequence tags database using yeast protein sequences as "probes" to identify the human gene orthologs to BCS1, COX15, PET112, COX11, and SCO1, five yeast genes involved in the biogenesis of the mitochondrial respiratory chain complexes. In yeast, BCS1 is involved mainly in the assembly of complex III, while the other genes appear to control the structure/function of cytochrome-c oxidase. Significant amino acid identity and similarity were demonstrated by comparison of the human with the corresponding yeast polypeptides. Sequence alignment revealed numerous colinear identical regions and the conservation of functional domains. Mitochondrial targeting of the human gene products, suggested by computer analysis of the protein sequences, was confirmed by an in vitro import and protease-protection assay. These data strongly suggest that the human gene products share similar or identical functions with their yeast homologues. Genes controlling the structure/function of the respiratory chain complexes are attractive candidates for human mitochondrial disorders such as Leigh disease. However, both sequence analysis and functional complementation assays on an index patient do not support an etiological role for any of these genes.
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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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