NDUFS1 is located on the q arm of chromosome 2 in position 33.3 and has 20 exons.[3] The NDUFS1 gene produces a 79.5 kDa protein composed of 727 amino acids.[4][5] NDUFS1, the protein encoded by this gene, is a member of the complex I 75 kDa subunit family. It contains a transit peptide, 10 turns, 19 beta strands, 27 alpha helixes, and cofactor binding sites for [2Fe-2S] and [4Fe-4S] clusters. The cluster domains consist of a 79 amino acid 2Fe-2S ferredoxin-type from positions 30-108, a 40 amino acid 4Fe-4S His(Cys)3-ligated-type from positions 108-147, and a 57 amino acid 4Fe-4S Mo/W bis-MGD-type from positions 245-301.[6][7] Several transcript variants encoding different isoforms have been found for this gene.[2]
Function
The protein encoded by this gene belongs to the complex I 75 kDa subunit family. Mammalian complex I is composed of 45 different subunits. It locates at the mitochondrial inner membrane. This protein has NADH dehydrogenase activity and oxidoreductase activity. It transfers electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone. This protein is the largest subunit of complex I and it is a component of the iron-sulfur (IP) fragment of the enzyme. It may form part of the active site crevice where NADH is oxidized.[2]
Clinical significance
Mutations in the NDUFS1 gene are associated with Mitochondrial Complex I Deficiency, which is autosomal recessive. This deficiency is the most common enzymatic defect of the oxidative phosphorylation disorders.[8][9] Mitochondrial complex I deficiency shows extreme genetic heterogeneity and can be caused by mutation in nuclear-encoded genes or in mitochondrial-encoded genes. There are no obvious genotype-phenotype correlations, and inference of the underlying basis from the clinical or biochemical presentation is difficult, if not impossible.[10] However, the majority of cases are caused by mutations in nuclear-encoded genes.[11][12] It causes a wide range of clinical disorders, ranging from lethal neonatal disease to adult-onset neurodegenerative disorders. Phenotypes include macrocephaly with progressive leukodystrophy, nonspecific encephalopathy, hypertrophic cardiomyopathy, myopathy, liver disease, Leigh syndrome, Leber hereditary optic neuropathy, and some forms of Parkinson disease.[13]
↑Chow W, Ragan I, Robinson BH (November 1991). "Determination of the cDNA sequence for the human mitochondrial 75-kDa Fe-S protein of NADH-coenzyme Q reductase". European Journal of Biochemistry. 201 (3): 547–50. doi:10.1111/j.1432-1033.1991.tb16313.x. PMID1935949.
↑McFarland R, Kirby DM, Fowler KJ, Ohtake A, Ryan MT, Amor DJ, Fletcher JM, Dixon JW, Collins FA, Turnbull DM, Taylor RW, Thorburn DR (January 2004). "De novo mutations in the mitochondrial ND3 gene as a cause of infantile mitochondrial encephalopathy and complex I deficiency". Annals of Neurology. 55 (1): 58–64. doi:10.1002/ana.10787. PMID14705112.
↑Haack TB, Haberberger B, Frisch EM, Wieland T, Iuso A, Gorza M, Strecker V, Graf E, Mayr JA, Herberg U, Hennermann JB, Klopstock T, Kuhn KA, Ahting U, Sperl W, Wilichowski E, Hoffmann GF, Tesarova M, Hansikova H, Zeman J, Plecko B, Zeviani M, Wittig I, Strom TM, Schuelke M, Freisinger P, Meitinger T, Prokisch H (April 2012). "Molecular diagnosis in mitochondrial complex I deficiency using exome sequencing". Journal of Medical Genetics. 49 (4): 277–83. doi:10.1136/jmedgenet-2012-100846. PMID22499348.
↑Triepels RH, Van Den Heuvel LP, Trijbels JM, Smeitink JA (2001). "Respiratory chain complex I deficiency". American Journal of Medical Genetics. 106 (1): 37–45. doi:10.1002/ajmg.1397. PMID11579423.
↑Robinson BH (May 1998). "Human complex I deficiency: clinical spectrum and involvement of oxygen free radicals in the pathogenicity of the defect". Biochimica et Biophysica Acta. 1364 (2): 271–86. doi:10.1016/s0005-2728(98)00033-4. PMID9593934.
Baertling F, Schaper J, Mayatepek E, Distelmaier F (July 2013). "Teaching NeuroImages: rapidly progressive leukoencephalopathy in mitochondrial complex I deficiency". Neurology. 81 (2): e10–1. doi:10.1212/WNL.0b013e31829a339b. PMID23836946.
Duncan AM, Chow W, Robinson BH (1992). "Localization of the human 75-kDal Fe-S protein of NADH-coenzyme Q reductase gene (NDUFS1) to 2q33----q34". Cytogenetics and Cell Genetics. 60 (3–4): 212–3. doi:10.1159/000133340. PMID1505218.
Sumegi B, Srere PA (December 1984). "Complex I binds several mitochondrial NAD-coupled dehydrogenases". The Journal of Biological Chemistry. 259 (24): 15040–5. PMID6439716.
Loeffen JL, Triepels RH, van den Heuvel LP, Schuelke M, Buskens CA, Smeets RJ, Trijbels JM, Smeitink JA (December 1998). "cDNA of eight nuclear encoded subunits of NADH:ubiquinone oxidoreductase: human complex I cDNA characterization completed". Biochemical and Biophysical Research Communications. 253 (2): 415–22. doi:10.1006/bbrc.1998.9786. PMID9878551.
Ricci JE, Muñoz-Pinedo C, Fitzgerald P, Bailly-Maitre B, Perkins GA, Yadava N, Scheffler IE, Ellisman MH, Green DR (June 2004). "Disruption of mitochondrial function during apoptosis is mediated by caspase cleavage of the p75 subunit of complex I of the electron transport chain". Cell. 117 (6): 773–86. doi:10.1016/j.cell.2004.05.008. PMID15186778.
Martín MA, Blázquez A, Gutierrez-Solana LG, Fernández-Moreira D, Briones P, Andreu AL, Garesse R, Campos Y, Arenas J (April 2005). "Leigh syndrome associated with mitochondrial complex I deficiency due to a novel mutation in the NDUFS1 gene". Archives of Neurology. 62 (4): 659–61. doi:10.1001/archneur.62.4.659. PMID15824269.
Rual JF, Venkatesan K, Hao T, Hirozane-Kishikawa T, Dricot A, Li N, Berriz GF, Gibbons FD, Dreze M, Ayivi-Guedehoussou N, Klitgord N, Simon C, Boxem M, Milstein S, Rosenberg J, Goldberg DS, Zhang LV, Wong SL, Franklin G, Li S, Albala JS, Lim J, Fraughton C, Llamosas E, Cevik S, Bex C, Lamesch P, Sikorski RS, Vandenhaute J, Zoghbi HY, Smolyar A, Bosak S, Sequerra R, Doucette-Stamm L, Cusick ME, Hill DE, Roth FP, Vidal M (October 2005). "Towards a proteome-scale map of the human protein-protein interaction network". Nature. 437 (7062): 1173–8. doi:10.1038/nature04209. PMID16189514.
Iuso A, Scacco S, Piccoli C, Bellomo F, Petruzzella V, Trentadue R, Minuto M, Ripoli M, Capitanio N, Zeviani M, Papa S (April 2006). "Dysfunctions of cellular oxidative metabolism in patients with mutations in the NDUFS1 and NDUFS4 genes of complex I". The Journal of Biological Chemistry. 281 (15): 10374–80. doi:10.1074/jbc.M513387200. PMID16478720.
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