Cited by 334Iron Metabolism and DisordersFerroptosis and cancer prognosisNeurological diseases and metabolism

The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.

Hepcidin-Induced Endocytosis of Ferroportin Is Dependent on Ferroportin Ubiquitination

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Qiao, Bo, Sugianto, Priscilla, Fung, Eileen, del-Castillo-Rueda, Alejandro, Moran-Jimenez, Maria-Josefa, Ganz, Tomas, Nemeth, Elizabeta·2012·Cell Metabolism

Abstract

Ferroportin exports iron into plasma from absorptive enterocytes, erythrophagocytosing macrophages, and hepatic stores. The hormone hepcidin controls cellular iron export and plasma iron concentrations by binding to ferroportin and causing its internalization and degradation. We explored the mechanism of hepcidin-induced endocytosis of ferroportin, the key molecular event in systemic iron homeostasis. Hepcidin binding caused rapid ubiquitination of ferroportin in cell lines overexpressing ferroportin and in murine bone marrow-derived macrophages. No hepcidin-dependent ubiquitination was observed in C326S ferroportin mutant which does not bind hepcidin. Substitutions of lysines between residues 229 and 269 in the third cytoplasmic loop of ferroportin prevented hepcidin-dependent ubiquitination and endocytosis of ferroportin, and promoted cellular iron export even in the presence of hepcidin. The human ferroportin mutation K240E, previously associated with clinical iron overload, caused hepcidin resistance in vitro by interfering with ferroportin ubiquitination. Our study demonstrates that ubiquitination is the functionally relevant signal for hepcidin-induced ferroportin endocytosis.

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Crossref · 10.1016/j.cmet.2012.03.018

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Metadata

Authors
Qiao, B., Sugianto, P., Fung, E., del-Castillo-Rueda, A., Moran-Jimenez, M.-J., Ganz, T., & Nemeth, E.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Nemeth, Elizabeta
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2012-06
Volume
15
Issue
6
Pages
918-924
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2020932850
Cited by
334
References
23
Citations by year
2026: 18 · 2025: 21 · 2024: 25 · 2023: 28 · 2022: 26 · 2021: 35 · 2020: 25 · 2019: 22 · 2018: 15 · 2017: 26 · 2016: 16 · 2015: 16 · 2014: 28 · 2013: 20 · 2012: 9
FWCI
15.54
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK082717)
  • Jonsson Comprehensive Cancer Center
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Ferroptosis and cancer prognosis
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
Keywords
hepcidin, ferroportin, ubiquitination, endocytosis, iron export, iron homeostasis, iron overload, lysine residues, macrophages, enterocytes
MeSH terms
Ferroportin, Endocytosis, Humans, Iron, Protein Binding, Protein Processing, Post-Translational, Mutagenesis, Site-Directed, Amino Acid Substitution, Amino Acid Motifs, Protein Transport, Antimicrobial Cationic Peptides, Cation Transport Proteins, Ubiquitination, HEK293 Cells, Hepcidins

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