Cited by 39Porphyrin Metabolism and DisordersIron Metabolism and DisordersHemoglobinopathies and Related Disorders

Iron regulatory protein-1 protects against mitoferrin-1-deficient porphyria

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Chung, Jacky, Anderson, Sheila A., Gwynn, Babette, Deck, Kathryn M., Chen, Michael J., Langer, Nathaniel B., Shaw, George C., Huston, Nicholas C. +18 more·2014·Journal of Biological Chemistry

Abstract

Mitochondrial iron is essential for the biosynthesis of heme and iron-sulfur ([Fe-S]) clusters in mammalian cells. In developing erythrocytes, iron is imported into the mitochondria by MFRN1 (mitoferrin-1, SLC25A37). Although loss of MFRN1 in zebrafish and mice leads to profound anemia, mutant animals showed no overt signs of porphyria, suggesting that mitochondrial iron deficiency does not result in an accumulation of protoporphyrins. Here, we developed a gene trap model to provide in vitro and in vivo evidence that iron regulatory protein-1 (IRP1) inhibits protoporphyrin accumulation. Mfrn1(+/gt);Irp1(-/-) erythroid cells exhibit a significant increase in protoporphyrin levels. IRP1 attenuates protoporphyrin biosynthesis by binding to the 5'-iron response element (IRE) of alas2 mRNA, inhibiting its translation. Ectopic expression of alas2 harboring a mutant IRE, preventing IRP1 binding, in Mfrn1(gt/gt) cells mimics Irp1 deficiency. Together, our data support a model whereby impaired mitochondrial [Fe-S] cluster biogenesis in Mfrn1(gt/gt) cells results in elevated IRP1 RNA-binding that attenuates ALAS2 mRNA translation and protoporphyrin accumulation.

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  • Mitoferrin1 and Mitoferrin2 are responsible for the mitochondrial import of iron.

    “The mitoferrin transporters (Mitoferrin1 and Mitoferrin2) are responsible for the mitochondrial import of iron (Shaw et al., 2006; Troadec et al., 2011; Chung et al., 2014).”

    From The Role of Iron Regulation in Immunometabolism and Immune-Related Disease (2019) · cites this paper as Chung et al., 2014

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Authors
Chung, J., Anderson, S. A., Gwynn, B., Deck, K. M., Chen, M. J., Langer, N. B., Shaw, G. C., Huston, N. C., Boyer, L. F., Datta, S., Paradkar, P. N., Li, L., Wei, Z., Lambert, A. J., Sahr, K., Wittig, J. G., Chen, W., Lu, W., Galy, B., Schlaeger, T. M., Hentze, M. W., Ward, D. M., Kaplan, J., Eisenstein, R. S., Peters, L. L., & Paw, B. H.
Affiliations
  • Brigham and Women's Hospital (US)
  • University of Wisconsin–Madison (US)
  • Jackson Laboratory (US)
  • Boston Children's Hospital (US)
  • University of Utah (US)
  • University of Southern California (US)
  • European Molecular Biology Laboratory (DE)
Corresponding author
  • Peters, Luanne L.
  • Paw, Barry H.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2014-03
Volume
289
Issue
11
Pages
7835-7843
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2072657902
Cited by
39
References
49
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 4 · 2020: 8 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 2 · 2015: 2 · 2014: 3
FWCI
1.37
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • The Mouseion at the JAXlibrary (Jackson Laboratory) (submittedVersion)
Funders
National Institutes of Health (R01 HL088468, R01 DK052380, R01 DK066600, R01 DK070838, P01 HL032262)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Porphyrin Metabolism and Disorders
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Medicine › Genetics › Hemoglobinopathies and Related Disorders
Keywords
iron regulatory protein 1, porphyria, protoporphyrin accumulation, iron-responsive element, iron-sulfur cluster assembly, erythroid cells, heme biosynthesis, anemia
MeSH terms
5-Aminolevulinate Synthetase, Animals, Blastocyst, Cell Differentiation, Female, Gene Expression Regulation, Genotype, Heme, Humans, Iron, Iron-Sulfur Proteins, Male, Mice, Inbred C57BL, Porphyrias, Protoporphyrins, Protein Biosynthesis, Zebrafish, Membrane Transport Proteins, Iron Regulatory Protein 1, Cell Line, Tumor, Mice, HEK293 Cells

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