Human complex I defects can be resolved by monoclonal antibody analysis into distinct subunit assembly patterns
| Autor: | Lambert P. van den Heuvel, Jan A.M. Smeitink, Linda Sundell, Roderick A. Capaldi, Ralf H. Triepels, Bonnie J. Hanson, Michael F. Marusich |
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| Rok vydání: | 2001 |
| Předmět: |
medicine.drug_class
Protein subunit NDUFV1 Inborn errors of metabolism Biology Monoclonal antibody Biochemistry Disturbances in biochemical and functional development of the kidney during childhood medicine Animals Humans NADH NADPH Oxidoreductases Erfelijke stofwisselingsziekten Molecular Biology Cells Cultured DNA Primers Electron Transport Complex I NDUFS7 Base Sequence NDUFS8 NDUFS2 NDUFS4 Cell Biology Stoornissen in de biochemische en functionele ontwikkeling van de nier op kinderleeftijd Molecular biology Mitochondrial respiratory chain Mutation Cattle |
| Zdroj: | Journal of Biological Chemistry, 276, 8892-7 Journal of Biological Chemistry, 276, 12, pp. 8892-7 |
| ISSN: | 0021-9258 |
| Popis: | Contains fulltext : 185667.pdf (Publisher’s version ) (Open Access) Complex I defects are one of the most frequent causes of mitochondrial respiratory chain disorders. Therefore, it is important to find new approaches for detecting and characterizing Complex I deficiencies. In this paper, we introduce a new set of monoclonal antibodies that react with 39-, 30-, 20-, 18-, 15-, and 8-kDa subunits of Complex I. These antibodies are shown to aid in diagnosis of Complex I deficiencies and add understanding to the genotype-phenotype relationships of different mutations. A total of 11 different patients were examined. Four patients had undefined Complex I defects, whereas the other patients had defects in NDUFV1, NDUFS2 (two patients), NDUFS4 (two patients), NDUFS7, and NDUFS8. We show here that Western blotting with these antibodies, particularly when used in conjunction with sucrose gradient studies and enzymatic activity measurements, helps distinguish catalytic versus assembly defects and further distinguishes between mutations in different subunits. Furthermore, different mutations in the same gene are shown to give very similar subunit profiles, and we show that one of the patients is a good candidate for having a defect in a Complex I assembly factor. |
| Databáze: | OpenAIRE |
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