Cited by 234Cancer, Hypoxia, and MetabolismHeat shock proteins researchUbiquitin and proteasome pathways

The DOI matches its Crossref record; 39 of the 39 references it cites were found in a registry or an index.

Hsp70 and CHIP Selectively Mediate Ubiquitination and Degradation of Hypoxia-inducible Factor (HIF)-1α but Not HIF-2α

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Abstract

Hypoxia-inducible factors (HIFs) are transcription factors that mediate adaptive responses to reduced oxygen availability. HIF-alpha subunits are stabilized under conditions of acute hypoxia. However, prolonged hypoxia leads to decay of HIF-1alpha but not HIF-2alpha protein levels by unknown mechanisms. Here, we identify Hsp70 and CHIP (carboxyl terminus of Hsc70-interacting protein) as HIF-1alpha-interacting proteins. Hsp70, through recruiting the ubiquitin ligase CHIP, promotes the ubiquitination and proteasomal degradation of HIF-1alpha but not HIF-2alpha, thereby inhibiting HIF-1-dependent gene expression. Disruption of Hsp70-CHIP interaction blocks HIF-1alpha degradation mediated by Hsp70 and CHIP. Inhibition of Hsp70 or CHIP synthesis by RNA interference increases protein levels of HIF-1alpha but not HIF-2alpha and attenuates the decay of HIF-1alpha levels during prolonged hypoxia. Thus, Hsp70- and CHIP-dependent ubiquitination represents a molecular mechanism by which prolonged hypoxia selectively reduces the levels of HIF-1alpha but not HIF-2alpha protein.

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  1. Semenza, 1992, Mol. Cell. Biol., 12, 5447
  2. Gu, 1998, Gene Expr., 7, 205

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Metadata

Authors
Luo, W., Zhong, J., Chang, R., Hu, H., Pandey, A., & Semenza, G. L.
Affiliations
Johns Hopkins University (US)
Corresponding author
Semenza, Gregg L.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2010-02
Volume
285
Issue
6
Pages
3651-3663
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2022643257
Cited by
232
References
39
Citations by year
2026: 5 · 2025: 9 · 2024: 15 · 2023: 12 · 2022: 12 · 2021: 11 · 2020: 16 · 2019: 18 · 2018: 10 · 2017: 18 · 2016: 15 · 2015: 22 · 2014: 11 · 2013: 19 · 2012: 15
FWCI
4.24
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Johns Hopkins University
  • National Institutes of Health (n01hv28180-13-0-0, RR020839)
  • National Heart, Lung, and Blood Institute (N01 HV-28180, N01 HV028180)
  • National Center for Research Resources (U54RR020839)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
HSP70, CHIP, HIF-1α, HIF-2α, hypoxia-inducible factor, ubiquitination, proteasomal degradation, protein stability, prolonged hypoxia, ubiquitin ligase
MeSH terms
Endothelial PAS Domain-Containing Protein 1, Cell Line, Humans, Mutation, Protein Binding, Transfection, Immunoblotting, Cell Hypoxia, HSP70 Heat-Shock Proteins, RNA Interference, Ubiquitin-Protein Ligases, Cell Line, Tumor, Proteasome Endopeptidase Complex, Immunoprecipitation, Basic Helix-Loop-Helix Proteins, Hypoxia-Inducible Factor 1, alpha Subunit, Ubiquitination

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