Cited by 277Mitochondrial Function and PathologyNeurological diseases and metabolismIron Metabolism and Disorders

The Yeast Frataxin Homologue Mediates Mitochondrial Iron Efflux

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Radisky, Derek C., Babcock, Michael C., Kaplan, Jerry·1999·Journal of Biological Chemistry

Abstract

Mutations in the nuclear gene encoding the mitochondrial protein frataxin are responsible for the neurological disorder Friedreich ataxia (FA). Yeast strains with a deletion in the frataxin homologue YFH1 accumulate excess iron in mitochondria and demonstrate mitochondrial damage. We show that in the absence of YFH1, mitochondrial damage is proportional to the concentration and duration of exposure to extracellular iron, establishing mitochondrial iron accumulation as causal to mitochondrial damage. Reintroduction of YFH1 results in the rapid export of accumulated mitochondrial iron into the cytosol as free, non-heme bound iron, demonstrating that mitochondrial iron in the yeast FA model can be made bioavailable. These results demonstrate a mitochondrial iron cycle in which Yfh1p regulates mitochondrial iron efflux.

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Crossref · 10.1074/jbc.274.8.4497

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Authors
Radisky, D. C., Babcock, M. C., & Kaplan, J.
Affiliations
University of Utah (US)
Corresponding author
Kaplan, Jerry
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1999-02
Volume
274
Issue
8
Pages
4497-4499
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2009136033
Cited by
277
References
18
Citations by year
2026: 1 · 2025: 5 · 2023: 5 · 2022: 5 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 7 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 7 · 2013: 12 · 2012: 3
FWCI
13.46
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p50dk049219-05)
  • National Cancer Institute (CA42014, P30CA042014)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 52380, R01DK052380, DK-49219)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
Keywords
frataxin, Yfh1, Friedreich's ataxia, mitochondrial iron accumulation, mitochondrial damage, yeast model, non-heme iron
MeSH terms
Frataxin, Biological Transport, Friedreich Ataxia, Iron, Mitochondria, Phosphotransferases (Alcohol Group Acceptor), Iron-Binding Proteins

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