The proton-translocating NADH-quinone oxidoreductase (complex I) is one of five enzyme complexes in the oxidative phosphorylation system in mammalian mitochondria. Complex I is composed of 46 different subunits, 7 of which are encoded by mitochondrial DNA. Defects of complex I are involved in many human mitochondrial diseases; therefore, the authors proposed to use the NDI1 gene encoding a single subunit NADH dehydrogenase of Saccharomyces cerevisiae for repair of respiratory activity. The yeast NDI1 gene was successfully introduced into 10 mammalian cell lines (two of which were complex I-deficient mutants). The expressed Ndi1 protein was correctly targeted to the matrix side of the inner mitochondrial membranes, was fully functional, and restored the NADH oxidase activity to the complex I-deficient cells. The NDI1-transduced cells were more resistant to complex I inhibitors and diminished production of reactive oxygen species. It was further shown that the Ndi1 protein can be functionally expressed in tissues such as skeletal muscles and brain of rodents. The Ndi1 expression scarcely induced an inflammatory response as assessed by hematoxylin and eosin (H&E) staining. The Ndi1 protein expressed in the substantia nigra (SN) elicited protective effects against neurodegeneration caused by 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine treatment. The Ndi1 protein has a great potential as a molecular remedy for complex I deficiencies.
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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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