Cited by 224Hemoglobin structure and functionNitric Oxide and Endothelin EffectsMetal-Catalyzed Oxygenation Mechanisms

Catalytic generation of N2O3 by the concerted nitrite reductase and anhydrase activity of hemoglobin

Basu, Swati, Grubina, Rozalina, Huang, Jinming, Conradie, Jeanet, Huang, Zhi, Jeffers, Anne, Jiang, Alice, He, Xiaojun +9 more·2007·Nature Chemical Biology

Abstract

Nitrite reacts with deoxyhemoglobin to form nitric oxide (NO) and methemoglobin. Though this reaction is experimentally associated with NO generation and vasodilation, kinetic analysis suggests that NO should not be able to escape inactivation in the erythrocyte. We have discovered that products of the nitrite-hemoglobin reaction generate dinitrogen trioxide (N2O3) via a novel reaction of NO and nitrite-bound methemoglobin. The oxygen-bound form of nitrite-methemoglobin shows a degree of ferrous nitrogen dioxide (Fe(II)-NO2*) character, so it may rapidly react with NO to form N2O3. N2O3 partitions in lipid, homolyzes to NO and readily nitrosates thiols, all of which are common pathways for NO escape from the erythrocyte. These results reveal a fundamental heme globin- and nitrite-catalyzed chemical reaction pathway to N2O3, NO and S-nitrosothiol that could form the basis of in vivo nitrite-dependent signaling. Because the reaction redox-cycles (that is, regenerates ferrous heme) and the nitrite-methemoglobin intermediate is not observable by electron paramagnetic resonance spectroscopy, this reaction has been 'invisible' to experimentalists over the last 100 years.

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Crossref · 10.1038/nchembio.2007.46

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  • Altered RBC structure and signalling may restrict the export of NO to vascular tissues, thereby reducing vasodilatory responses despite adequate nitrite levels.

    “Altered RBC structure and signalling may also restrict the export of NO to vascular tissues, thereby reducing vasodilatory responses despite adequate nitrite levels [56,128,263].”
  • The formation of N2O3 in the red blood cell via an anhydrase reaction involving Hb, NO, and nitrite constitutes a possible pathway to preserve NO bioactivity.

    “As discussed previously in section IIB2, the formation of N2O3 in the red blood cell via an anhydrase reaction involving Hb, NO, and nitrite (69) constitutes a possible pathway to preserve NO bioactivity (367).”
  • Several proposed mechanisms explain how nitrite-derived bioactivity can be exported from the red blood cell, generally involving either a compartment model with submembrane localization or formation of another nitrogen oxide such as a nitrosothiol or N2O3.

    “Several proposed mechanisms have been constructed to explain how nitrite-derived bioactivity can be exported from the red blood cell and these generally involve either a compartment model with submembrane localization of the reaction allowing for inefficient free NO escape, or the formation of another nitrogen oxide such as a nitrosothiol or N2O3 that can get out of the red blood cell and carry NO”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [47]

  • Another possibility is that nitrite binds to MetHb which subsequently reacts with NO to make N2O3.

    “Another possibility is that nitrite binds to MetHb which subsequently reacts with NO to make N2O3 [47].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [47]

  • Formation of N2O3 from nitrite would facilitate export of NO activity from the red blood cell and evidence for the formation of this species has been reported.

    “Formation of N2O3 from nitrite would facilitate export of NO activity from the red blood cell and evidence for the formation of this species has been reported [45–47, 99].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [47]

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Authors
Basu, S., Grubina, R., Huang, J., Conradie, J., Huang, Z., Jeffers, A., Jiang, A., He, X., Azarov, I., Seibert, R., Mehta, A., Patel, R., King, S. B., Hogg, N., Ghosh, A., Gladwin, M. T., & Kim-Shapiro, D. B.
Affiliations
  • Wake Forest University (US)
  • National Institutes of Health (US)
  • University of the Free State (ZA)
  • Virginia Tech - Wake Forest University School of Biomedical Engineering & Sciences (US)
  • University of Alabama (US)
  • Medical College of Wisconsin (US)
  • UiT The Arctic University of Norway (NO)
Corresponding author
Gladwin, Mark T
Venue
Nature Chemical Biology
Published
2007-11-04
Volume
3
Issue
12
Pages
785-794
ISSN
  • 1552-4450 (ISSN-L)
  • 1552-4469
OpenAlex
W1969488383
Cited by
224
References
50
Citations by year
2026: 4 · 2025: 3 · 2024: 5 · 2023: 5 · 2022: 3 · 2021: 10 · 2020: 4 · 2019: 3 · 2018: 9 · 2017: 9 · 2016: 9 · 2015: 10 · 2014: 18 · 2013: 18 · 2012: 19
FWCI
9.92
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Chemical Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL-62198, K02HL078706, R37HL058091, HL58091, R01HL062198)
  • National Institute of General Medical Sciences (GM55792)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
Keywords
dinitrogen trioxide, nitrite, hemoglobin, methemoglobin, nitric oxide, nitrite reductase, S-nitrosothiols, erythrocytes
MeSH terms
Catalysis, Electron Spin Resonance Spectroscopy, Hemoglobins, Iron, Models, Molecular, Molecular Conformation, Nitrite Reductases, Nitrites, Nitrogen Oxides, Oxidation-Reduction, Oxygen

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