Cited by 937Metal-Catalyzed Oxygenation MechanismsEnzyme Structure and FunctionBiochemical Acid Research Studies

Fe(II)/α-Ketoglutarate-Dependent Hydroxylases and Related Enzymes

Hausinger, Robert P.·2004·Critical Reviews in Biochemistry and Molecular Biology

Abstract

FeII/alpha-ketoglutarate (alphaKG)-dependent hydroxylases catalyze an amazing diversity of reactions that result in protein side-chain modifications, repair of alkylated DNA/RNA, biosynthesis of antibiotics and plant products, metabolism related to lipids, and biodegradation of a variety of compounds. These enzymes possess a beta-strand "jellyroll" structural fold that contains three metal-binding ligands found in a His1-X-Asp/Glu-Xn-His2 motif. The cosubstrate, alphaKG, chelates FeII using its C-2 keto group (binding opposite the Asp/Glu residue) and C-1 carboxylate (coordinating opposite either His1 or His2). Oxidative decomposition of alphaKG forms CO2 plus succinate and leads to the generation of an FeIV-oxo or other activated oxygen species that hydroxylate the primary substrate. The reactive oxygen species displays alternate reactivity in related enzymes that catalyze desaturations, ring expansions, or ring closures. Other enzymes resemble the FeII/alphaKG-dependent hydroxylases in terms of protein structure or chemical mechanism but do not utilize alphaKG as a substrate. This review describes the reactions catalyzed by this superfamily of enzymes, highlights key active site features revealed by structural studies, and summarizes results from spectroscopic and other approaches that provide insights into the chemical mechanisms.

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Crossref · 10.1080/10409230490440541

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  • Additional αKGDDs might play a role in how ascorbate fights cancer.

    “Given that more than forty αKGDDs exist112, it is possible that other αKGDDs could contribute to the anticancer mechanisms of ascorbate.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [112]

  • More than forty αKGDDs exist.

    “Given that more than forty αKGDDs exist112, it is possible that other αKGDDs could contribute to the anticancer mechanisms of ascorbate.”

    From Targeting cancer vulnerabilities with high-dose vitamin C (2019) · cites this paper as [112]

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Authors
Hausinger, R. P.
Affiliations
Michigan State University (US)
Corresponding author
Hausinger, Robert P.
Venue
Critical Reviews in Biochemistry and Molecular Biology
Published
2004-01
Volume
39
Issue
1
Pages
21-68
ISSN
  • 0045-6411 (ISSN-L)
  • 1040-9238
  • 1549-7798
OpenAlex
W2128586767
Cited by
937
References
335
Citations by year
2026: 37 · 2025: 27 · 2024: 42 · 2023: 34 · 2022: 41 · 2021: 56 · 2020: 45 · 2019: 44 · 2018: 43 · 2017: 44 · 2016: 44 · 2015: 67 · 2014: 60 · 2013: 48 · 2012: 48
FWCI
25.19
Type
journal article
Language
en
Open access
closed
Locations
  • Critical Reviews in Biochemistry and Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of General Medical Sciences (GM063584, R01GM063584)
Topics
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Biochemical Acid Research Studies
Keywords
alpha-ketoglutarate, reactive oxygen species, DNA repair, alkylated DNA, antibiotic biosynthesis, lipid metabolism, biodegradation, desaturation, ring expansion, cyclization, active site structure, enzyme mechanism
MeSH terms
Ferrous Compounds, Mixed Function Oxygenases, Ketoglutaric Acids, Protein Conformation, Molecular Structure

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