In vivo maturation of human frataxin
Abstract
The defective expression of frataxin causes the hereditary neurodegenerative disorder Friedreich's ataxia (FRDA). Human frataxin is synthesized as a 210 amino acid precursor protein, which needs proteolytic processing into mitochondria to be converted into the functional mature form. In vitro processing of human frataxin was previously described to yield a 155 amino acid mature form, corresponding to residues 56-210 (frataxin(56-210)). Here, we studied the maturation of frataxin by in vivo overexpression in human cells. Our data show that the main form of mature frataxin is generated by a proteolytic cleavage between Lys80 and Ser81, yielding a 130 amino acid protein (frataxin(81-210)). This maturation product corresponds to the endogenous frataxin detected in human heart, peripheral blood lymphocytes or dermal fibroblasts. Moreover, we demonstrate that frataxin(81-210) is biologically functional, as it rescues aconitase defects in frataxin-deficient cells derived from FRDA patients. Importantly, our data indicate that frataxin(56-210) can be produced in vivo when the primary 80-81 maturation site is unavailable, suggesting the existence of proteolytic mechanisms that can actively control the size of the mature product, with possible functional implications.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In the brain, oligodendrocytes, microglia, and neurons express ferritin.
“In the brain, the oligodendrocytes, microglia, and neurons express ferritin (53).”
From Intracellular iron transport and storage: from molecular mechanisms to health implications (2008) · cites this paper as [53]
Cites
Three-dimensional tracking of axonal projections in the brain by magnetic resonance imaging
Mori, S., Crain, B. J., Chacko, V. P., & van Zijl, P. C. M. (1999) · Annals of Neurology · doi:10.1002/1531-8249(199902)45:2 · Cited by 3,479 · see citing works
Friedreich's Ataxia: Autosomal Recessive Disease Caused by an Intronic GAA Triplet Repeat Expansion
Campuzano, V., Montermini, L., Moltò, M. D., Pianese, L., Cossée, M., Cavalcanti, F., Monros, E., Rodius, F., Duclos, F., Monticelli, A., et al. (1996) · Science · doi:10.1126/science.271.5254.1423 · Cited by 2,786 · see citing works
Aconitase and mitochondrial iron–sulphur protein deficiency in Friedreich ataxia
Rötig, A., de Lonlay, P., Chretien, D., Foury, F., Koenig, M., Sidi, D., Munnich, A., & Rustin, P. (1997) · Nature Genetics · doi:10.1038/ng1097-215 · Cited by 991 · see citing works
Regulation of Mitochondrial Iron Accumulation by Yfh1p, a Putative Homolog of Frataxin
Babcock, M., de Silva, D., Oaks, R., Davis-Kaplan, S., Jiralerspong, S., Montermini, L., Pandolfo, M., & Kaplan, J. (1997) · Science · doi:10.1126/science.276.5319.1709 · Cited by 921 · see citing works
Puccio, H., Simon, D., Cossée, M., Criqui-Filipe, P., Tiziano, F., Melki, J., Hindelang, C., Matyas, R., Rustin, P., & Koenig, M. (2001) · Nature Genetics · doi:10.1038/84818 · Cited by 738 · see citing works
Mitochondrial processing peptidases
Gakh, O., Cavadini, P., & Isaya, G. (2002) · Biochimica et Biophysica Acta (BBA) - Molecular Cell Research · doi:10.1016/s0167-4889(02)00265-3 · Cited by 436 · see citing works
Iron–sulphur cluster biogenesis and mitochondrial iron homeostasis
Rouault, T. A., & Tong, W.-H. (2005) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm1620 · Cited by 432 · see citing works
Cossee, M. (2000) · Human Molecular Genetics · doi:10.1093/hmg/9.8.1219 · Cited by 377 · see citing works
Wong, A. (1999) · Human Molecular Genetics · doi:10.1093/hmg/8.3.425 · Cited by 374 · see citing works
Frataxin Acts as an Iron Chaperone Protein to Modulate Mitochondrial Aconitase Activity
Bulteau, A.-L., O’Neill, H. A., Kennedy, M. C., Ikeda‐Saito, M., Isaya, G., & Szweda, L. I. (2004) · Science · doi:10.1126/science.1098991 · Cited by 372 · see citing works
Yoon, T., & Cowan, J. A. (2003) · Journal of the American Chemical Society · doi:10.1021/ja027967i · Cited by 353 · see citing works
Clinical, biochemical and molecular genetic correlations in Friedreich's ataxia
Bradley, J. L. (2000) · Human Molecular Genetics · doi:10.1093/hmg/9.2.275 · Cited by 339 · see citing works
Frataxin-mediated Iron Delivery to Ferrochelatase in the Final Step of Heme Biosynthesis
Yoon, T., & Cowan, J. A. (2004) · Journal of Biological Chemistry · doi:10.1074/jbc.c400107200 · Cited by 281 · see citing works
Iron-Sulfur Cluster Biosynthesis
Layer, G., de Choudens, S. O., Sanakis, Y., & Fontecave, M. (2006) · Journal of Biological Chemistry · doi:10.1074/jbc.m513569200 · Cited by 257 · see citing works
Taylor, A. B., Smith, B. S., Kitada, S., Kojima, K., Miyaura, H., Otwinowski, Z., Ito, A., & Deisenhofer, J. (2001) · Structure · doi:10.1016/s0969-2126(01)00621-9 · Cited by 246 · see citing works
Crystal Structure of Human Frataxin
Dhe-Paganon, S., Shigeta, R., Chi, Y.-I., Ristow, M., & Shoelson, S. E. (2000) · Journal of Biological Chemistry · doi:10.1074/jbc.c000407200 · Cited by 226 · see citing works
Frataxin activates mitochondrial energy conversion and oxidative phosphorylation
Ristow, M., Pfister, M. F., Yee, A. J., Schubert, M., Michael, L., Zhang, C., Ueki, K., Michael, M. D., Lowell, B. B., & Kahn, C. R. (2000) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.220403797 · Cited by 221 · see citing works
Simon, D., Seznec, H., Gansmuller, A., Carelle, N., Weber, P., Metzger, D., Rustin, P., Koenig, M., & Puccio, H. (2004) · The Journal of Neuroscience · doi:10.1523/jneurosci.4549-03.2004 · Cited by 205 · see citing works
Assembly and iron-binding properties of human frataxin, the protein deficient in Friedreich ataxia
Cavadini, P. (2002) · Human Molecular Genetics · doi:10.1093/hmg/11.3.217 · Cited by 197 · see citing works
Disabled early recruitment of antioxidant defenses in Friedreich's ataxia
Chantrel-Groussard, K. (2001) · Human Molecular Genetics · doi:10.1093/hmg/10.19.2061 · Cited by 189 · see citing works
Gakh, O., Park, S., Liu, G., Macomber, L., Imlay, J. A., Ferreira, G. C., & Isaya, G. (2006) · Human Molecular Genetics · doi:10.1093/hmg/ddi461 · Cited by 184 · see citing works
Sakamoto, N., Ohshima, K., Montermini, L., Pandolfo, M., & Wells, R. D. (2001) · Journal of Biological Chemistry · doi:10.1074/jbc.m101879200 · Cited by 181 · see citing works
Iron–sulfur protein maturation in human cells: evidence for a function of frataxin
Stehling, O., Elsässer, H.-P., Brückel, B., Mühlenhoff, U., & Lill, R. (2004) · Human Molecular Genetics · doi:10.1093/hmg/ddh324 · Cited by 176 · see citing works
Towards a structural understanding of Friedreich’s ataxia: the solution structure of frataxin
Musco, G., Stier, G., Kolmerer, B., Adinolfi, S., Martin, S., Frenkiel, T., Gibson, T., & Pastore, A. (2000) · Structure · doi:10.1016/s0969-2126(00)00158-1 · Cited by 166 · see citing works
The Structure and Function of Frataxin
Bencze, K. Z., Kondapalli, K. C., Cook, J. D., McMahon, S., Millán‐Pacheco, C., Pastor, N., & Stemmler, T. L. (2006) · Critical Reviews in Biochemistry and Molecular Biology · doi:10.1080/10409230600846058 · Cited by 164 · see citing works
Chen, O. S., Hemenway, S., & Kaplan, J. (2002) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.192449599 · Cited by 152 · see citing works
Bulteau, A., Lundberg, K. C., Ikeda‐Saito, M., Isaya, G., & Szweda, L. I. (2005) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0501519102 · Cited by 131 · see citing works
Maturation of wild-type and mutated frataxin by the mitochondrial processing peptidase
Koutníková, H. (1998) · Human Molecular Genetics · doi:10.1093/hmg/7.9.1485 · Cited by 122 · see citing works
Two-step Processing of Human Frataxin by Mitochondrial Processing Peptidase
Cavadini, P., Adamec, J., Taroni, F., Gakh, O., & Isaya, G. (2000) · Journal of Biological Chemistry · doi:10.1074/jbc.m006539200 · Cited by 114 · see citing works
Branda, S. S., Cavadini, P., Adamec, J., Kalousek, F., Taroni, F., & Isaya, G. (1999) · Journal of Biological Chemistry · doi:10.1074/jbc.274.32.22763 · Cited by 107 · see citing works
Iron‐induced oligomerization of yeast frataxin homologue Yfh1 is dispensable in vivo
Aloria, K., Schilke, B. A., Andrew, A. J., & Craig, E. A. (2004) · EMBO Reports · doi:10.1038/sj.embor.7400272 · Cited by 104 · see citing works
A Pool of Extramitochondrial Frataxin That Promotes Cell Survival
Condò, I., Ventura, N., Malisan, F., Tomassini, B., & Testi, R. (2006) · Journal of Biological Chemistry · doi:10.1074/jbc.m511960200 · Cited by 90 · see citing works
Self-citationFrataxin expression rescues mitochondrial dysfunctions in FRDA cells
Tan, G. (2001) · Human Molecular Genetics · doi:10.1093/hmg/10.19.2099 · Cited by 82 · see citing works
Pandolfo, M. (2003) · Seminars in Pediatric Neurology · doi:10.1016/s1071-9091(03)00025-1 · Cited by 81 · see citing works
Sztul, E. S., Hendrick, J. P., Kraus, J. P., et al. (1987) · The Journal of Cell Biology · doi:10.1083/jcb.105.6.2631 · Cited by 78 · see citing works
Manganese superoxide dismutase induction by iron is impaired in Friedreich ataxia cells
Jiralerspong, S., Ge, B., Hudson, T. J., & Pandolfo, M. (2001) · FEBS Letters · doi:10.1016/s0014-5793(01)03140-4 · Cited by 78 · see citing works
O’Neill, H. A., Gakh, O., & Isaya, G. (2004) · Journal of Molecular Biology · doi:10.1016/j.jmb.2004.10.074 · Cited by 57 · see citing works
Gordon, D. M., Shi, Q., Dancis, A., & Pain, D. (1999) · Human Molecular Genetics · doi:10.1093/hmg/8.12.2255 · Cited by 46 · see citing works
Yoon, T., Dizin, E., & Cowan, J. A. (2007) · JBIC Journal of Biological Inorganic Chemistry · doi:10.1007/s00775-007-0205-2 · Cited by 41 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
Intracellular iron transport and storage: from molecular mechanisms to health implications
Mackenzie, E. L., Iwasaki, K., & Tsuji, Y. (2008) · Antioxidants & Redox Signaling · doi:10.1089/ars.2007.1893 · Cited by 526 · see citing works
Friedreich's ataxia: Pathology, pathogenesis, and molecular genetics
Koeppen, A. H. (2011) · Journal of the Neurological Sciences · doi:10.1016/j.jns.2011.01.010 · Cited by 447 · see citing works
Aconitases: non-redox iron-sulfur proteins sensitive to reactive species
Castro, L., Tórtora, V., Mansilla, S., & Radi, R. (2019) · Accounts of Chemical Research · doi:10.1021/acs.accounts.9b00150 · Cited by 146 · see citing works
Advancements in the pathophysiology of Friedreich’s Ataxia and new prospects for treatments
Babady, N. E., Carelle, N., Wells, R. D., Rouault, T. A., Hirano, M., Lynch, D. R., Delatycki, M. B., Wilson, R. B., Isaya, G., & Puccio, H. (2007) · Molecular Genetics and Metabolism · doi:10.1016/j.ymgme.2007.05.009 · Cited by 73 · see citing works
- Authors
- Condò, I., Ventura, N., Malisan, F., Rufini, A., Tomassini, B., & Testi, R.
- Affiliations
- University of Rome Tor Vergata (IT)
- Corresponding author
- Testi, Roberto
- Venue
- Human Molecular Genetics
- Publisher
- Oxford University Press (OUP)
- Published
- 2007-04-27
- Volume
- 16
- Issue
- 13
- Pages
- 1534-1540
- ISSN
- 0964-6906 (ISSN-L)
- 1460-2083
- OpenAlex
- W2120039680
- Cited by
- 118
- References
- 39
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 3 · 2023: 6 · 2022: 7 · 2021: 3 · 2020: 7 · 2019: 9 · 2018: 9 · 2017: 5 · 2016: 4 · 2015: 5 · 2014: 8 · 2013: 9 · 2012: 7
- FWCI
- 2.79
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Human Molecular Genetics (publishedVersion)
- PubMed (publishedVersion)
- Cineca Institutional Research Information System (Tor Vergata University) (submittedVersion)
- Funders
- Friedreich's Ataxia Research Alliance
- National Ataxia Foundation
- Ataxia UK
- European Commission
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
- Keywords
- frataxin, Friedreich's ataxia, protein maturation, proteolytic processing, mitochondrial targeting, aconitase, protein isoforms
- MeSH terms
- Frataxin, Aconitate Hydratase, Amino Acid Sequence, Cell Line, Cells, Cultured, Fibroblasts, Friedreich Ataxia, Gene Expression Regulation, Homozygote, Humans, Lymphocytes, Models, Biological, Molecular Sequence Data, Mutation, Gene Deletion, Iron-Binding Proteins
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review