Cited by 89Nitric Oxide and Endothelin EffectsMitochondrial Function and PathologyAmino Acid Enzymes and Metabolism

Reduction of N ω-hydroxy-L-arginine by the mitochondrial amidoxime reducing component (mARC)

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Kotthaus, Jürke, Wahl, Bettina, Havemeyer, Antje, Kotthaus, Joscha, Schade, Dennis, Garbe-Schönberg, Dieter, Mendel, Ralf, Bittner, Florian +1 more·2011·Biochemical Journal

Abstract

NOSs (nitric oxide synthases) catalyse the oxidation of L-arginine to L-citrulline and nitric oxide via the intermediate NOHA (Nω-hydroxy-L-arginine). This intermediate is rapidly converted further, but to a small extent can also be liberated from the active site of NOSs and act as a transportable precursor of nitric oxide or potent physiological inhibitor of arginases. Thus its formation is of enormous importance for the nitric-oxide-generating system. It has also been shown that NOHA is reduced by microsomes and mitochondria to L-arginine. In the present study, we show for the first time that both human isoforms of the newly identified mARC (mitochondrial amidoxime reducing component) enhance the rate of reduction of NOHA, in the presence of NADH cytochrome b5 reductase and cytochrome b5, by more than 500-fold. Consequently, these results provide the first hints that mARC might be involved in mitochondrial NOHA reduction and could be of physiological significance in affecting endogenous nitric oxide levels. Possibly, this reduction represents another regulative mechanism in the complex regulation of nitric oxide biosynthesis, considering a mitochondrial NOS has been identified. Moreover, this reduction is not restricted to NOHA since the analogous arginase inhibitor NHAM (Nω-hydroxy-Nδ-methyl-L-arginine) is also reduced by this system.

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  1. 21 Clement, B. (1998) Oxidation and reduction of nitrogen via CYP450: Importance of the reduction of genotoxic N-hydroxylated functional groups. In Drug metabolism: Towards the next millenium (Gooderham, N. J., ed.). pp. 59-71, IOS Press, Amsterdam

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Authors
Kotthaus, J., Wahl, B., Havemeyer, A., Kotthaus, J., Schade, D., Garbe-Schönberg, D., Mendel, R., Bittner, F., & Clement, B.
Affiliations
  • Christian-Albrechts-Universität zu Kiel (DE)
  • Technische Universität Braunschweig (DE)
  • ICPMS Laboratory Institute of Geosciences, Christian-Albrechts-University of Kiel, Ludewig-Meyn-Str. 10, D-24118 Kiel, Germany
Corresponding author
  • Havemeyer, Antje
  • Kotthaus, Joscha
  • Schade, Dennis
  • Clement, Bernd
Venue
Biochemical Journal
Published
2010-12-22
Volume
433
Issue
2
Pages
383-391
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W1989353969
Cited by
88
References
47
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 5 · 2022: 5 · 2021: 2 · 2020: 7 · 2019: 5 · 2018: 7 · 2017: 2 · 2016: 3 · 2015: 4 · 2014: 12 · 2013: 10 · 2012: 8
FWCI
6.28
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • Trinity's Access to Research Output (TARA) (Trinity College Dublin) (submittedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
Keywords
nitric oxide synthase, nitric oxide production, NADH-cytochrome b5 reductase, cytochrome b5, arginase inhibition
MeSH terms
Animals, Arginine, Benzamidines, Humans, Oxidation-Reduction, Oxidoreductases, Swine, Mitochondrial Proteins, Hep G2 Cells

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