Cited by 214Hemoglobin structure and functionNitric Oxide and Endothelin EffectsMitochondrial Function and Pathology

Nitrite reductase activity of cytochrome c

Open access
Basu, Swati, Azarova, Natalia A., Font, Michael D., King, S. Bruce, Hogg, Neil, Gladwin, Mark T., Shiva, Sruti, Kim-Shapiro, Daniel B.·2008·Journal of Biological Chemistry

Abstract

Small increases in physiological nitrite concentrations have now been shown to mediate a number of biological responses, including hypoxic vasodilation, cytoprotection after ischemia/reperfusion, and regulation of gene and protein expression. Thus, while nitrite was until recently believed to be biologically inert, it is now recognized as a potentially important hypoxic signaling molecule and therapeutic agent. Nitrite mediates signaling through its reduction to nitric oxide, via reactions with several heme-containing proteins. In this report, we show for the first time that the mitochondrial electron carrier cytochrome c can also effectively reduce nitrite to NO. This nitrite reductase activity is highly regulated as it is dependent on pentacoordination of the heme iron in the protein and occurs under anoxic and acidic conditions. Further, we demonstrate that in the presence of nitrite, pentacoordinate cytochrome c generates bioavailable NO that is able to inhibit mitochondrial respiration. These data suggest an additional role for cytochrome c as a nitrite reductase that may play an important role in regulating mitochondrial function and contributing to hypoxic, redox, and apoptotic signaling within the cell.

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Crossref · 10.1074/jbc.m806934200

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  • We subsequently demonstrated that cytochrome-c gained ability to reduce nitrite in the presence of anionic phospholipids.

    “We subsequently demonstrated that cytochrome-c gained ability to reduce nitrite in the presence of anionic phospholipids [73].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [73]

  • Under conditions where pentacoordination is favored, cytochrome-c mediated NO production from nitrite could reach 14 nM/s.

    “Under conditions where pentacoordination is favored, we previously calculated that cytochrome-c mediated NO production from nitrite could reach 14 nM/s [73].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [73]

  • The nitrite reductase activity of neuroglobin or cytochrome c is negligible when the heme is hexacoordinated.

    “the nitrite reductase activity of neuroglobin [63, 64, 70, 76] or cytochrome c [47] is negligible when the heme is hexacoordinated.”
  • Exogenous administration of nitrite correlates with increased levels of S-nitrosothiols in red blood cells and other tissues both in vivo and in vitro.

    “exogenous administration of nitrite correlates with increased levels of S-nitrosothiols in red blood cells and other tissues both in vivo and in vitro [25, 43, 46-53].”
  • A potential mechanism by which nitrite could induce cGMP-independent effects is S-nitrosation of cysteine residues, a potential nitrite-induced post-translational modification that can alter protein function.

    “A potential mechanism by which nitrite could induce cGMP-independent effects is S-nitrosation of cysteine residues, which is being increasingly recognized as a potential nitrite-induced post-translational modification that can alter protein function[17, 43, 46, 47, 51, 96].”

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Research works printed but not linked: 9

  1. Castello, P. R., Woo, D. K., Ball, K., Wojcik, J., Liu, L., and Poyton, R. O. (2008) Proc. Natl. Acad. Sci. 105, 8203-8208
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Authors
Basu, S., Azarova, N. A., Font, M. D., King, S. B., Hogg, N., Gladwin, M. T., Shiva, S., & Kim-Shapiro, D. B.
Affiliations
  • Wake Forest University (US)
  • Medical College of Wisconsin (US)
  • University of Pittsburgh (US)
Corresponding author
Shiva, Sruti
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2008-11
Volume
283
Issue
47
Pages
32590-32597
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2078178926
Cited by
214
References
61
Citations by year
2026: 5 · 2025: 15 · 2024: 6 · 2023: 8 · 2022: 6 · 2021: 8 · 2020: 16 · 2019: 6 · 2018: 17 · 2017: 10 · 2016: 14 · 2015: 16 · 2014: 11 · 2013: 14 · 2012: 13
FWCI
7.00
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (HL058091)
  • National Heart, Lung, and Blood Institute (HL058091, K02HL078706, R37HL058091, HL078706)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
cytochrome c, nitrite reductase activity, nitric oxide, hypoxia signaling, mitochondrial respiration inhibition, mitochondrial function, redox signaling, apoptosis
MeSH terms
Animals, Hypoxia, Cattle, Hydrogen-Ion Concentration, Kinetics, Mitochondria, Nitric Oxide, Nitrite Reductases, Oxygen, Oxygen Consumption, Phosphatidylcholines, Spectrophotometry, Signal Transduction, Apoptosis, Cytochromes c

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