Cited by 80Metal-Catalyzed Oxygenation MechanismsCancer, Hypoxia, and MetabolismBiochemical Acid Research Studies

Non-enzymatic chemistry enables 2-hydroxyglutarate-mediated activation of 2-oxoglutarate oxygenases

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Tarhonskaya, Hanna, Rydzik, Anna M., Leung, Ivanhoe K. H., Loik, Nikita D., Chan, Mun Chiang, Kawamura, Akane, McCullagh, James S. O., Claridge, Timothy D. W. +2 more·2014·Nature Communications

Abstract

Accumulation of (R)-2-hydroxyglutarate in cells results from mutations to isocitrate dehydrogenase that correlate with cancer. A recent study reports that (R)-, but not (S)-2-hydroxyglutarate, acts as a co-substrate for the hypoxia-inducible factor prolyl hydroxylases via enzyme-catalysed oxidation to 2-oxoglutarate. Here we investigate the mechanism of 2-hydroxyglutarate-enabled activation of 2-oxoglutarate oxygenases, including prolyl hydroxylase domain 2, the most important human prolyl hydroxylase isoform. We observe that 2-hydroxyglutarate-enabled catalysis by prolyl hydroxylase domain 2 is not enantiomer-specific and is stimulated by ferrous/ferric ion and reducing agents including L-ascorbate. The results reveal that 2-hydroxyglutarate is oxidized to 2-oxoglutarate non-enzymatically, likely via iron-mediated Fenton-chemistry, at levels supporting in vitro catalysis by 2-oxoglutarate oxygenases. Succinic semialdehyde and succinate are also identified as products of 2-hydroxyglutarate oxidation. Overall, the results rationalize the reported effects of 2-hydroxyglutarate on catalysis by prolyl hydroxylases in vitro and suggest that non-enzymatic 2-hydroxyglutarate oxidation may be of biological interest.

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  • High levels of succinate or 2-HG inhibit α-KGDDs, including PHDs, TET DNA demethylases, and JMJDs.

    “High levels of succinate or 2-HG inhibit α-KGDDs. These include the PHDs, the TET DNA demethylases, and the JMJDs154-156”

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Authors
Tarhonskaya, H., Rydzik, A. M., Leung, I. K. H., Loik, N. D., Chan, M. C., Kawamura, A., McCullagh, J. S. O., Claridge, T. D. W., Flashman, E., & Schofield, C. J.
Affiliations
University of Oxford (GB)
Corresponding author
  • Flashman, Emily
  • Schofield, Christopher J.
Venue
Nature Communications
Published
2014-03-05
Volume
5
Issue
1
Pages
3423-3423
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2074128267
Cited by
80
References
59
Citations by year
2026: 2 · 2025: 4 · 2024: 6 · 2023: 5 · 2022: 9 · 2021: 6 · 2020: 5 · 2019: 5 · 2018: 10 · 2017: 8 · 2016: 9 · 2015: 6 · 2014: 5
FWCI
3.98
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion)
  • Newcastle University ePrints (Newcastle Univesity) (cc-by)
Funders
  • Wellcome Trust
  • Cancer Research UK (18245)
  • British Heart Foundation (PG/12/33/29546)
  • University of Oxford
  • Directorate for Biological Sciences
  • Biotechnology and Biological Sciences Research Council
Topics
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Biochemical Acid Research Studies
Keywords
2-hydroxyglutarate, prolyl hydroxylase domain 2, non-enzymatic oxidation, Fenton chemistry, iron-mediated oxidation, IDH mutation, succinic semialdehyde, succinic acid, L-ascorbate, cancer metabolism, enantiomer specificity
MeSH terms
Alcohol Oxidoreductases, Ascorbic Acid, gamma-Aminobutyric Acid, Glutarates, Oxygenases, Succinic Acid

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