Mitochondria as Generators and Targets of Nitric Oxide

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Mitochondrial biochemistry is complex, expanding from oxidative phosphorylation, lipid catabolism and haem biosynthesis, to apoptosis, calcium homeostasis, and production of reactive oxygen and nitrogen species, including nitric oxide (NO). This molecule is produced by a mitochondrial nitric-oxide synthase (mtNOS). The rates of consumption and production determine the steady-state concentration of NO at subcellular levels, leading to the regulation of several mitochondrial events. Temporospatial processes tightly regulate the production of NO in mitochondria to maximize target effects and minimize deleterious reactions. Temporal regulatory mechanisms of mtNOS include activation by calcium and transcriptional/translational regulation. Calciumactivated mtNOS inhibits mitochondrial respiration. This regulation antagonizes the effects of calcium on matrix calcium-dependent dehydrogenases, preventing the formation of anoxic foci. Temporal regulation of NO production by intracellular calcium signalling requires the understanding of the heterogeneous intracellular calcium response and calcium distribution. NO production in mitochondria is spatially regulated by subcellular localization of mtNOS (e.g. acylation and protein-protein interactions), in addition to transcriptional regulation. Given the short half-life of NO in biological systems, organelle localization of mtNOS is crucial for NO to function as a signal molecule. These temporospatial processes are biologically important to allow NO to act as an effective signal molecule to regulate mitochondrial events.

Original languageEnglish (US)
Title of host publicationMitochondrial Biology: New Perspectives
Publisherwiley
Pages92-100
Number of pages9
ISBN (Electronic)9780470725207
ISBN (Print)9780470066577
DOIs
StatePublished - May 20 2008

Fingerprint

Mitochondria
Nitric Oxide
Nitric Oxide Synthase
Calcium
Molecules
Reactive Nitrogen Species
Acylation
Biochemistry
Calcium Signaling
Biosynthesis
Oxidative Phosphorylation
Biological systems
Heme
Organelles
Transcriptional Activation
Half-Life
Reactive Oxygen Species
Oxidoreductases
Respiration
Proteins

Keywords

  • Calcium
  • Cytochrome c oxidase
  • Mitochondria
  • Nitric-oxide synthase
  • Oxygen gradient
  • Reactive oxygen and nitrogen species

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Giulivi, C. R. (2008). Mitochondria as Generators and Targets of Nitric Oxide. In Mitochondrial Biology: New Perspectives (pp. 92-100). wiley. https://doi.org/10.1002/9780470725207.ch7

Mitochondria as Generators and Targets of Nitric Oxide. / Giulivi, Cecilia R.

Mitochondrial Biology: New Perspectives. wiley, 2008. p. 92-100.

Research output: Chapter in Book/Report/Conference proceedingChapter

Giulivi, CR 2008, Mitochondria as Generators and Targets of Nitric Oxide. in Mitochondrial Biology: New Perspectives. wiley, pp. 92-100. https://doi.org/10.1002/9780470725207.ch7
Giulivi CR. Mitochondria as Generators and Targets of Nitric Oxide. In Mitochondrial Biology: New Perspectives. wiley. 2008. p. 92-100 https://doi.org/10.1002/9780470725207.ch7
Giulivi, Cecilia R. / Mitochondria as Generators and Targets of Nitric Oxide. Mitochondrial Biology: New Perspectives. wiley, 2008. pp. 92-100
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