Cited by 334Cancer, Hypoxia, and MetabolismMetal-Catalyzed Oxygenation MechanismsErythropoietin and Anemia Treatment

Multiple Factors Affecting Cellular Redox Status and Energy Metabolism Modulate Hypoxia-Inducible Factor Prolyl Hydroxylase Activity In Vivo and In Vitro

Open access
Pan, Yi, Mansfield, Kyle D., Bertozzi, Cara C., Rudenko, Viktoriya, Chan, Denise A., Giaccia, Amato J., Simon, M. Celeste·2007·Molecular and Cellular Biology

Abstract

Prolyl hydroxylation of hypoxible-inducible factor alpha (HIF-alpha) proteins is essential for their recognition by pVHL containing ubiquitin ligase complexes and subsequent degradation in oxygen (O(2))-replete cells. Therefore, HIF prolyl hydroxylase (PHD) enzymatic activity is critical for the regulation of cellular responses to O(2) deprivation (hypoxia). Using a fusion protein containing the human HIF-1alpha O(2)-dependent degradation domain (ODD), we monitored PHD activity both in vivo and in cell-free systems. This novel assay allows the simultaneous detection of both hydroxylated and nonhydroxylated PHD substrates in cells and during in vitro reactions. Importantly, the ODD fusion protein is regulated with kinetics identical to endogenous HIF-1alpha during cellular hypoxia and reoxygenation. Using in vitro assays, we demonstrated that the levels of iron (Fe), ascorbate, and various tricarboxylic acid (TCA) cycle intermediates affect PHD activity. The intracellular levels of these factors also modulate PHD function and HIF-1alpha accumulation in vivo. Furthermore, cells treated with mitochondrial inhibitors, such as rotenone and myxothiazol, provided direct evidence that PHDs remain active in hypoxic cells lacking functional mitochondria. Our results suggest that multiple mitochondrial products, including TCA cycle intermediates and reactive oxygen species, can coordinate PHD activity, HIF stabilization, and cellular responses to O(2) depletion.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1128/mcb.01223-06

Cites

59 of 59 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • EGLN 1-3 activity and HIF-α stability are affected by iron availability and can be inhibited by Krebs cycle intermediates succinate and fumarate.

    “As a result, EGLN 1–3 activity and HIF-α stability are affected by iron availability and can be inhibited by Krebs cycle intermediates, including succinate and fumarate, which compete with 2-oxoglutarate”

    From Hypoxic control of metastasis (2016) · cites this paper as [18]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Pan, Y., Mansfield, K. D., Bertozzi, C. C., Rudenko, V., Chan, D. A., Giaccia, A. J., & Simon, M. C.
Affiliations
  • Howard Hughes Medical Institute (US)
  • University of Pennsylvania (US)
  • Stanford Medicine (US)
Corresponding author
Simon, M. Celeste
Venue
Molecular and Cellular Biology
Published
2007-02-01
Volume
27
Issue
3
Pages
912-925
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2105236768
Cited by
332
References
59
Citations by year
2026: 8 · 2025: 7 · 2024: 16 · 2023: 15 · 2022: 15 · 2021: 11 · 2020: 14 · 2019: 18 · 2018: 16 · 2017: 14 · 2016: 25 · 2015: 19 · 2014: 18 · 2013: 22 · 2012: 19
FWCI
6.53
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • Cancer Research Institute
  • National Institutes of Health (CA104838)
  • National Cancer Institute (P01CA104838, CA104838)
  • Abramson Family Cancer Research Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
Keywords
HIF-1α, oxygen-dependent degradation domain, HIF-1α stabilization, cellular redox status, energy metabolism, iron, vitamin C, tricarboxylic acid cycle intermediates, reactive oxygen species, mitochondrial inhibitors, rotenone, myxothiazol, oxygen deprivation, reoxygenation
MeSH terms
Animals, Carcinoma, Renal Cell, Electron Transport, Electrophoresis, Polyacrylamide Gel, Energy Metabolism, Gene Expression Regulation, Humans, Hydrogen Peroxide, Hydroxylation, Mitochondria, Oxidation-Reduction, Proline, Procollagen-Proline Dioxygenase, Recombinant Fusion Proteins, RNA, Messenger, Thermodynamics, Uncoupling Agents, Cell Hypoxia, Molecular Mimicry, Protein Transport, Mice, Von Hippel-Lindau Tumor Suppressor Protein, Hypoxia-Inducible Factor 1, alpha Subunit

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review