Mitochondrial DNA (mtDNA) is inherited as a protein-DNA complex (the nucleoid). Proteins associated with the nucleoid are not only components directly involved in maintenance and propagation of mtDNA but can also be bi-functional enzymes whose metabolic activities are not directly related to mtDNA stability. In the yeast Saccharomyces cerevisiae, one such enzyme, Ilv5p is required for branch chain amino acid biosynthesis but also associates with the nucleoid. Deletions of ILV5 lead not only to metabolic defects but also to destabilization of mtDNA. Further, minor overproduction of Ilv5p stabilizes mtDNA in strains lacking Abf2p, a major mtDNA binding and packaging protein. Here we show that Ilv5p binds double-stranded DNA in vitro and is unaffected by the presence of saturating concentrations of Abf2p. In cells lacking Abf2p the amount of Ilv5p associated with the nucleoid increases significantly and is proportional to the mitochondrial concentration of Ilv5p. Altogether, we conclude that direct binding of Ilv5p can aid in the maintenance and stabilization of mtDNA.
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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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Evidence ID | Analyze ID | File | Description |
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