Cited by 25Mitochondrial Function and PathologyPhysiological and biochemical adaptationsRedox biology and oxidative stress

What physiological role(s) does the alternative oxidase perform in animals?

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Jacobs, Howard T., Ballard, J. William O.·2022·Biochimica et Biophysica Acta (BBA) - Bioenergetics

Abstract

Although the alternative oxidase, AOX, was known to be widespread in the animal kingdom by 2004, its exact physiological role in animals remains poorly understood. Here we present what evidence has accumulated thus far, indicating that it may play a role in enabling animals to resist various kinds of stress, including toxins, abnormal oxygen or nutrient levels, protein unfolding, dessication and pathogen attack. Much of our knowledge comes from studies in model organisms, where any benefits from exogenously expressed AOX may be masked by its unregulated expression, which may itself be stressful. The further question arises as to why AOX has been lost from some major crown groups, namely vertebrates, insects and cephalopods, if it plays important roles favouring the survival of other animals. We conclude by presenting some speculative ideas addressing this question, and an outline of how it might be approached experimentally.

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Crossref · 10.1016/j.bbabio.2022.148556

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Authors
Jacobs, H. T., & Ballard, J. W. O.
Affiliations
  • Tampere University (FI)
  • The University of Melbourne (AU)
Corresponding author
Jacobs, Howard T.
Venue
Biochimica et Biophysica Acta (BBA) - Bioenergetics
Publisher
Elsevier BV
Published
2022-08
Volume
1863
Issue
6
Pages
148556
ISSN
0005-2728 (ISSN-L)
OpenAlex
W4221035006
Cited by
25
References
80
Citations by year
2026: 3 · 2025: 5 · 2024: 7 · 2023: 6 · 2022: 4
FWCI
1.80
Type
journal article
Language
en
Open access
Locations
  • Biochimica et Biophysica Acta (BBA) - Bioenergetics (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • Tampere University Institutional Repository (Tampere University) (submittedVersion, cc-by)
  • La Trobe University (cc-by)
Funders
  • Academy of Finland (283157, 272376, 324730)
  • European Research Council (232738)
  • Australian Research Council (190102555, 160102575)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
alternative oxidase, physiological role, stress tolerance, oxidative stress, protein unfolding, desiccation, pathogen resistance, toxin resistance, mitochondrial respiration, model organisms
MeSH terms
Alternative Oxidase, Animals, Ciona intestinalis, Oxidoreductases, Plant Proteins, Mitochondrial Proteins

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