Cited by 112Pharmacogenetics and Drug MetabolismEnzyme Structure and FunctionMetal-Catalyzed Oxygenation Mechanisms

Structure and function of mammalian aldehyde oxidases

Terao, Mineko, Romão, Maria João, Leimkühler, Silke, Bolis, Marco, Fratelli, Maddalena, Coelho, Catarina, Santos-Silva, Teresa, Garattini, Enrico·2016·Archives of Toxicology

Abstract

Mammalian aldehyde oxidases (AOXs; EC1.2.3.1) are a group of conserved proteins belonging to the family of molybdo-flavoenzymes along with the structurally related xanthine dehydrogenase enzyme. AOXs are characterized by broad substrate specificity, oxidizing not only aromatic and aliphatic aldehydes into the corresponding carboxylic acids, but also hydroxylating a series of heteroaromatic rings. The number of AOX isoenzymes expressed in different vertebrate species is variable. The two extremes are represented by humans, which express a single enzyme (AOX1) in many organs and mice or rats which are characterized by tissue-specific expression of four isoforms (AOX1, AOX2, AOX3, and AOX4). In vertebrates each AOX isoenzyme is the product of a distinct gene consisting of 35 highly conserved exons. The extant species-specific complement of AOX isoenzymes is the result of a complex evolutionary process consisting of a first phase characterized by a series of asynchronous gene duplications and a second phase where the pseudogenization and gene deletion events prevail. In the last few years remarkable advances in the elucidation of the structural characteristics and the catalytic mechanisms of mammalian AOXs have been made thanks to the successful crystallization of human AOX1 and mouse AOX3. Much less is known about the physiological function and physiological substrates of human AOX1 and other mammalian AOX isoenzymes, although the importance of these proteins in xenobiotic metabolism is fairly well established and their relevance in drug development is increasing. This review article provides an overview and a discussion of the current knowledge on mammalian AOX.

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Crossref · 10.1007/s00204-016-1683-1

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Authors
Terao, M., Romão, M. J., Leimkühler, S., Bolis, M., Fratelli, M., Coelho, C., Santos-Silva, T., & Garattini, E.
Affiliations
  • Mario Negri Institute for Pharmacological Research (IT)
  • Universidade Nova de Lisboa (PT)
  • University of Potsdam (DE)
Corresponding author
Garattini, Enrico
Venue
Archives of Toxicology
Published
2016-02-26
Volume
90
Issue
4
Pages
753-780
ISSN
  • 0340-5761 (ISSN-L)
  • 1432-0738
OpenAlex
W2289764719
Cited by
112
References
151
Citations by year
2026: 3 · 2025: 9 · 2024: 12 · 2023: 7 · 2022: 7 · 2021: 19 · 2020: 11 · 2019: 13 · 2018: 15 · 2017: 12 · 2016: 4
FWCI
2.59
Type
journal article
Language
en
Open access
closed
Locations
  • Archives of Toxicology (publishedVersion)
  • PubMed (publishedVersion)
  • DORA PSI (Paul Scherrer Institute) (submittedVersion)
  • publish.UP (University of Potsdam) (submittedVersion)
Topics
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
Keywords
aldehyde oxidase, AOX1, AOX2, xanthine dehydrogenase, enzyme structure, catalytic mechanism, gene duplication, pseudogenization, gene deletion, xenobiotic metabolism, drug development, aldehyde oxidation
MeSH terms
Aldehyde Oxidoreductases, Animals, Catalysis, Escherichia coli, Humans, Mammals, Inactivation, Metabolic, Xenobiotics, Crystallography, X-Ray, Evolution, Molecular, Polymorphism, Single Nucleotide, Aldehyde Oxidase

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