Fxn Protein — Frataxin plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Frataxin is a mitochondrial protein encoded by the FXN gene (also known as the frataxin gene). It is essential for mitochondrial iron-sulfur cluster (Fe-S) biosynthesis and plays a critical role in cellular energy metabolism. Reduced frataxin levels cause Friedreich's ataxia, a progressive neurodegenerative disorder. [1]
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Iron-Sulfur Cluster Assembly:
Iron Homeostasis:
Electron Transport Chain:
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Friedreich's ataxia is caused by GAA repeat expansion in the first intron of the FXN gene, leading to reduced frataxin expression: [5]
Mitochondrial Dysfunction:
Iron Accumulation:
Cellular Vulnerability:
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Gene Therapy:
Small Molecules:
Iron Chelators:
Antioxidants:
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Campuzano V, et al. Frataxin is reduced in Friedreich ataxia patients and animal models. Nature Genetics. 1996.
Puccio H, et al. Mouse models for Friedreich ataxia showcase pharmacological and genetic therapies. Nature. 2021.
Lynch DR, et al. Omaveloxolone in Friedreich's ataxia. Annals of Neurology. 2022.
Frataxin is an iron-sulfur protein involved in mitochondrial function: Rotig A, et al. Nat Genet. Frataxin is an iron-sulfur protein involved in mitochondrial function. 1997. ↩︎
Frataxin and mitochondrial iron homeostasis: Lill R, et al. Eur J Clin Invest. Frataxin and mitochondrial iron homeostasis. 2009. ↩︎
Frataxin deficiency leads to oxidative stress: Chantrel-Groussard K, et al. Hum Mol Genet. Frataxin deficiency leads to oxidative stress. 2001. ↩︎
Iron-sulfur cluster biogenesis and frataxin: Stemmler TL, et al. Nat Chem Biol. Iron-sulfur cluster biogenesis and frataxin. 2015. ↩︎
Frataxin and neurodegeneration: Koeppen AH. J Neuropathol Exp Neurol. Frataxin and neurodegeneration. 2011. ↩︎
Therapeutic approaches to Friedreich's ataxia: Lynch DR, et al. Ann Neurol. Therapeutic approaches to Friedreich's ataxia. 2010. ↩︎
Frataxin and cardiac involvement in Friedreich's ataxia: Dutta D, et al. J Am Heart Assoc. Frataxin and cardiac involvement in Friedreich's ataxia. 2019. ↩︎