Cited by 143Nitric Oxide and Endothelin EffectsHemoglobin structure and functionMetal-Catalyzed Oxygenation Mechanisms

Endothelial nitric oxide synthase reduces nitrite anions to NO under anoxia

Gautier, Clément, van Faassen, Ernst, Mikula, Ivan, Martasek, Pavel, Slama-Schwok, Anny·2006·Biochemical and Biophysical Research Communications

Abstract

In this work, we demonstrate that endothelial nitric oxide synthase is capable of anoxic reduction of nitrite anions to nitric oxide at physiological pH by absorption and EPR spectroscopy and electrochemical measurements. The nitrite reduction is achieved at the oxygenase domain of the protein and proceeds even in the absence of the tetrahydrobiopterin cofactor. The nitrite pathway increases by sixfold the NO production with respect to the regular arginine pathway under hypoxia, which is largely blocked. Therefore, basal levels of NO release could be sustained by anoxic nitrite reduction. The reaction suggests a new pathway for fast NO delivery under hypoxia, precisely when the vasodilating properties of nitric oxide are most needed.

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Crossref · 10.1016/j.bbrc.2006.01.031

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31 of 31 references verified0 citation errors · 0 not checkable

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  • Endothelial NOS has been shown to be capable of reducing nitrite to NO.

    “Endothelial NOS has also been shown to be capable of reducing nitrite to NO [81–83].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [81]

  • Nitrite reduction by eNOS is most effective in the presence of calcium/calmodulin, tetrahydrobiopterin, and arginine, and is suggested to involve an additional active site besides the heme.

    “Nitrite reduction is most effective in the presence of calcium/calmodulin, tetrahydrobiopterin, and arginine, and is suggested to involve an additional active site besides the heme [81].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [81]

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Authors
Gautier, C., van Faassen, E., Mikula, I., Martasek, P., & Slama-Schwok, A.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Charles University (CZ)
Venue
Biochemical and Biophysical Research Communications
Publisher
Elsevier BV
Published
2006-03
Volume
341
Issue
3
Pages
816-821
ISSN
0006-291X (ISSN-L)
OpenAlex
W2116948662
Cited by
143
References
32
Citations by year
2025: 1 · 2024: 2 · 2023: 3 · 2022: 2 · 2021: 6 · 2020: 2 · 2019: 4 · 2018: 14 · 2017: 5 · 2016: 5 · 2015: 10 · 2014: 5 · 2013: 14 · 2012: 9
FWCI
8.40
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical and Biophysical Research Communications (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
Keywords
endothelial nitric oxide synthase, nitrite reduction, nitric oxide production, anoxia, hypoxia, oxygenase domain, tetrahydrobiopterin, vasodilation
MeSH terms
Anaerobiosis, Anions, NADP, Nitric Oxide, Nitrites, Oxidation-Reduction, Oxygen, Oxygenases, Spectrum Analysis, Cell Hypoxia, Nitric Oxide Synthase Type III

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