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Maesaquinone: A novel inhibitor of plant mitochondrial respiratory enzymes that react with ubiquinone
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posted on 2023-06-08, 06:01 authored by Charles Affourtit, David G Whitehouse, Anthony MooreThe effect of maesaquinone, 2-(14-nonadecenyl)-3,6-dihydroxy-5-methyl-1,4-benzoquinone, on plant mitochondrial respiration has been investigated, In mitochondria isolated from thermogenic Arum maculatum spadices, this compound inhibits both cytochrome and alternative pathway activities, Kinetic analyses reveal that this inhibition is the result of potent effects of maesaquinone on the alternative oxidase (ID50 < 0.3 mu M) and complex III (ID50 < 5 mu M). Succinate dehydrogenase and external NADH dehydrogenase are also inhibited, albeit to a lesser extent (similar to 30% at 1 mu M). These data suggest that maesaquinone specifically affects the interaction of the respective enzymes with ubiquinone
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Publication status
- Published
Journal
IUBMB LifeISSN
1521-6543Publisher
Wiley-BlackwellExternal DOI
Issue
6Volume
49Page range
533-537Department affiliated with
- Biochemistry Publications
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- No
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- Yes
Legacy Posted Date
2012-02-06Usage metrics
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