Cited by 59Erythropoietin and Anemia TreatmentCancer, Hypoxia, and MetabolismHemoglobinopathies and Related Disorders

Erythrocytosis-associated HIF-2α Mutations Demonstrate a Critical Role for Residues C-terminal to the Hydroxylacceptor Proline

Open access
Furlow, Paul W., Percy, Melanie J., Sutherland, Scott, Bierl, Charlene, McMullin, Mary Frances, Master, Stephen R., Lappin, Terence R.J., Lee, Frank S.·2009·Journal of Biological Chemistry

Abstract

A classic physiologic response to hypoxia in humans is the up-regulation of the ERYTHROPOIETIN (EPO) gene, which is the central regulator of red blood cell mass. The EPO gene, in turn, is activated by hypoxia inducible factor (HIF). HIF is a transcription factor consisting of an alpha subunit (HIF-alpha) and a beta subunit (HIF-beta). Under normoxic conditions, prolyl hydroxylase domain protein (PHD, also known as HIF prolyl hydroxylase and egg laying-defective nine protein) site specifically hydroxylates HIF-alpha in a conserved LXXLAP motif (where underlining indicates the hydroxylacceptor proline). This provides a recognition motif for the von Hippel Lindau protein, a component of an E3 ubiquitin ligase complex that targets hydroxylated HIF-alpha for degradation. Under hypoxic conditions, this inherently oxygen-dependent modification is arrested, thereby stabilizing HIF-alpha and allowing it to activate the EPO gene. We previously identified and characterized an erythrocytosis-associated HIF2A mutation, G537W. More recently, we reported two additional erythrocytosis-associated HIF2A mutations, G537R and M535V. Here, we describe the functional characterization of these two mutants as well as a third novel erythrocytosis-associated mutation, P534L. These mutations affect residues C-terminal to the LXXLAP motif. We find that all result in impaired degradation and thus aberrant stabilization of HIF-2alpha. However, each exhibits a distinct profile with respect to their effects on PHD2 binding and von Hippel Lindau interaction. These findings reinforce the importance of HIF-2alpha in human EPO regulation, demonstrate heterogeneity of functional defects arising from these mutations, and point to a critical role for residues C-terminal to the LXXLAP motif in HIF-alpha.

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 · 10.1074/jbc.m808737200

Cites

38 of 38 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

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

Research works printed but not linked: 2

  1. Percy, M. J., Zhao, Q., Flores, A., Harrison, C., Lappin, T. R., Maxwell, P. H., McMullin, M. F., and Lee, F. S. (2006) Proc. Natl. Acad. Sci. U. S. A. 103, 654 -659
  2. Yu, F., White, S. B., Zhao, Q., and Lee, F. S. (2001) Proc. Natl. Acad. Sci.

Cited by

Sorted by citations

Authors
Furlow, P. W., Percy, M. J., Sutherland, S., Bierl, C., McMullin, M. F., Master, S. R., Lappin, T. R. J., & Lee, F. S.
Affiliations
  • University of Pennsylvania (US)
  • Belfast City Hospital (GB)
  • Queen's University Belfast (GB)
Corresponding author
Lee, Frank S.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2009-04
Volume
284
Issue
14
Pages
9050-9058
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2023382136
Cited by
58
References
38
Citations by year
2026: 1 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 7 · 2020: 3 · 2019: 1 · 2018: 2 · 2016: 3 · 2015: 1 · 2014: 8 · 2013: 8 · 2012: 4
FWCI
4.22
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (Queen's University Belfast) (submittedVersion)
Funders
  • University of Pennsylvania
  • National Institutes of Health
  • National Cancer Institute (R01CA090261)
Topics
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Genetics › Hemoglobinopathies and Related Disorders
Keywords
HIF-2α, erythrocytosis, prolyl hydroxylase 2, PHD2, von Hippel-Lindau protein, hypoxia, protein stability
MeSH terms
Endothelial PAS Domain-Containing Protein 1, Amino Acid Sequence, Cell Line, Humans, Hydroxylation, Molecular Sequence Data, Mutation, Polycythemia, Proline, Procollagen-Proline Dioxygenase, Protein Binding, Sequence Alignment, Basic Helix-Loop-Helix Proteins, Basic Helix-Loop-Helix Transcription Factors, Von Hippel-Lindau Tumor Suppressor Protein, Biocatalysis

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