A number of mutants with pleiotropic effects on mitochondrial metabolism have been isolated in yeast Saccharomyces cerevisiae, and for many the biochemical function that is impaired is not yet known. We report here the isolation and characterization of the LIP5 gene involved in lipoic acid metabolism which complements the g189 mutant (Tzagoloff, A., and Dieckmann, C. L. (1990) Microbiol. Rev. 54, 211-225). DNA sequence analysis of complementing yeast genomic DNA revealed an open reading frame predicting a protein of 414 amino acids. The protein sequence deduced from the gene shares 43% identical residues with the product of the Escherichia coli lip gene, which codes an enzyme involved in lipoic acid synthesis. The LIP5 mutant is not capable of synthesizing lipoic acid but still possesses the activity necessary for attachment of lipoic acid to protein. Relative to the E. coli lip gene product, the LIP5 protein has an amino-terminal extension with characteristics of mitochondrial targeting signals. Cells carrying a disrupted copy of the LIP5 gene show slow growth on ethanol-rich media and barely detectable growth on glycerol-rich media. Unlike other strains with defects in the tricarboxylic acid cycle, LIP5 mutants undergo a high frequency of mitochondrial DNA deletions.
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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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