Cited by 2,084Autophagy in Disease and TherapyIron Metabolism and DisordersUbiquitin and proteasome pathways

The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.

Quantitative proteomics identifies NCOA4 as the cargo receptor mediating ferritinophagy

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Abstract

Autophagy, the process by which proteins and organelles are sequestered in double-membrane structures called autophagosomes and delivered to lysosomes for degradation, is critical in diseases such as cancer and neurodegeneration. Much of our understanding of this process has emerged from analysis of bulk cytoplasmic autophagy, but our understanding of how specific cargo, including organelles, proteins or intracellular pathogens, are targeted for selective autophagy is limited. Here we use quantitative proteomics to identify a cohort of novel and known autophagosome-enriched proteins in human cells, including cargo receptors. Like known cargo receptors, nuclear receptor coactivator 4 (NCOA4) was highly enriched in autophagosomes, and associated with ATG8 proteins that recruit cargo-receptor complexes into autophagosomes. Unbiased identification of NCOA4-associated proteins revealed ferritin heavy and light chains, components of an iron-filled cage structure that protects cells from reactive iron species but is degraded via autophagy to release iron through an unknown mechanism. We found that delivery of ferritin to lysosomes required NCOA4, and an inability of NCOA4-deficient cells to degrade ferritin led to decreased bioavailable intracellular iron. This work identifies NCOA4 as a selective cargo receptor for autophagic turnover of ferritin (ferritinophagy), which is critical for iron homeostasis, and provides a resource for further dissection of autophagosomal cargo-receptor connectivity.

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Metadata

Authors
Mancias, J. D., Wang, X., Gygi, S. P., Harper, J. W., & Kimmelman, A. C.
Affiliations
  • Beth Israel Deaconess Medical Center (US)
  • Dana-Farber Cancer Institute (US)
  • Harvard University (US)
Corresponding author
  • Harper, J. Wade
  • Kimmelman, Alec C.
Venue
Nature
Published
2014-03-30
Volume
509
Issue
7498
Pages
105-109
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1996152690
Cited by
2,084
References
30
Citations by year
2026: 289 · 2025: 335 · 2024: 311 · 2023: 292 · 2022: 212 · 2021: 192 · 2020: 110 · 2019: 96 · 2018: 64 · 2017: 69 · 2016: 57 · 2015: 36 · 2014: 19
FWCI
45.59
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • National Cancer Institute (P50CA127003, R01CA157490)
  • National Institute of General Medical Sciences (R01GM095567, R01GM070565, GM095567, GM070565)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Autophagy in Disease and Therapy
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
NCOA4, ferritinophagy, selective autophagy, cargo receptors, autophagosomes, iron homeostasis, iron starvation, ferritin degradation, ATG8, lysosomal degradation, iron metabolism, quantitative proteomics, lysosomal biogenesis
MeSH terms
Autophagy-Related Protein 8 Family, Autophagy, Biological Availability, Ferritins, Homeostasis, Humans, Iron, Lysosomes, Microfilament Proteins, Phagosomes, Protein Binding, Substrate Specificity, Protein Transport, Proteomics, Adaptor Proteins, Signal Transducing, Nuclear Receptor Coactivators

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