The neurodegenerative disease Friedreich's ataxia is caused by reduced levels of frataxin, a mitochondrial matrix protein. The in vivo role of frataxin is under debate. Frataxin, as well as its yeast homologue Yfh1, binds multiple iron atoms as an oligomer and has been proposed to function as a crucial iron-storage protein. We identified a mutant Yfh1 defective in iron-induced oligomerization. This mutant protein was able to replace functionally wild-type Yfh1, even when expressed at low levels, when mitochondrial iron levels were high and in mutant strains having deletions of genes that had synthetic growth defects with a YFH1 deletion. The ability of an oligomerization-deficient Yfh1 to function in vivo suggests that oligomerization, and thus oligomerization-induced iron storage, is not a critical function of Yfh1. Rather, the capacity of this oligomerization-deficient mutant to interact with the Isu protein suggests a more direct role of Yfh1 in iron-sulphur cluster biogenesis.
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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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