Cited by 94Redox biology and oxidative stressMetal-Catalyzed Oxygenation MechanismsNitric Oxide and Endothelin Effects

Peroxynitrite Mediates Active Site Tyrosine Nitration in Manganese Superoxide Dismutase. Evidence of a Role for the Carbonate Radical Anion

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Surmeli, N. Basak, Litterman, Nadia K., Miller, Anne-Frances, Groves, John T.·2010·Journal of the American Chemical Society

Abstract

Protein tyrosine nitration has been observed in a variety of human diseases associated with oxidative stress, such as inflammatory, neurodegenerative, and cardiovascular conditions. However, the pathways leading to nitration of tyrosine residues are still unclear. Recent studies have shown that peroxynitrite (PN), produced by the reaction of superoxide and nitric oxide, can lead to protein nitration and inactivation. Tyrosine nitration may also be mediated by nitrogen dioxide produced by the oxidation of nitrite by peroxidases. Manganese superoxide dismutase (MnSOD), which plays a critical role in cellular defense against oxidative stress by decomposing superoxide within mitochondria, is nitrated and inactivated under pathological conditions. In this study, MnSOD is shown to catalyze PN-mediated self-nitration. Direct, spectroscopic observation of the kinetics of PN decay and nitrotyrosine formation (k(cat) = 9.3 × 10(2) M(-1) s(-1)) indicates that the mechanism involves redox cycling between Mn(2+) and Mn(3+), similar to that observed with superoxide. Distinctive patterns of tyrosine nitration within MnSOD by various reagents were revealed and quantified by MS/MS analysis of MnSOD trypsin digest peptides. These analyses showed that three of the seven tyrosine residues of MnSOD (Tyr34, Tyr9, and Tyr11) were the most susceptible to nitration and that the relative amounts of nitration of these residues varied widely depending upon the nature of the nitrating agent. Notably, nitration mediated by PN, in both the presence and absence of CO2, resulted in nitration of the active site tyrosine, Tyr34, while nitration by freely diffusing nitrogen dioxide led to surface nitration at Tyr9 and Tyr11. Flux analysis of the nitration of Tyr34 by PN-CO2 showed that the nitration rate coincided with the kinetics of the reaction of PN with CO2. These kinetics and the 20-fold increase in the efficiency of tyrosine nitration in the presence of CO2 suggest a specific role for the carbonate radical anion (•CO3(-)) in MnSOD nitration by PN. We also observed that the nitration of Tyr34 caused inactivation of the enzyme, while nitration of Tyr9 and Tyr11 did not interfere with the superoxide dismutase activity. The loss of MnSOD activity upon Tyr34 nitration implies that the responsible reagent in vivo is peroxynitrite, acting either directly or through the action of •CO3(-).

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  • eNOS has been shown to enter the mitochondrion of pulmonary smooth muscle cells upon stimulation with asymmetric dimethyl arginine or endothelin-1.

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  1. [3]Ferrer-Sueta G Radi R ACS Chem Biol 2009 4 161 177 19267456
  2. [18]Zielonka J Sikora A Joseph J Kalyanaraman B J Biol Chem 2010 285 LE16 LE16 PMC2863194 20194496
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Authors
Surmeli, N. B., Litterman, N. K., Miller, A.-F., & Groves, J. T.
Affiliations
  • Department of Chemistry, Princeton University, Princeton New Jersey 08544, United States, and Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
  • University of Kentucky (US)
Corresponding author
Groves, John T.
Venue
Journal of the American Chemical Society
Published
2010-11-16
Volume
132
Issue
48
Pages
17174-17185
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2041443867
Cited by
94
References
97
Citations by year
2026: 4 · 2025: 3 · 2024: 6 · 2022: 5 · 2021: 2 · 2020: 4 · 2019: 7 · 2018: 9 · 2017: 4 · 2016: 6 · 2015: 5 · 2014: 7 · 2013: 15 · 2012: 9
FWCI
4.04
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of General Medical Sciences (R37GM036298)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
ASE, manganese superoxide dismutase, peroxynitrite, tyrosine nitration, nitrotyrosine, carbonate radical anion, active site tyrosine, enzyme inactivation, redox cycling, nitric oxide, superoxide, oxidative stress, nitration kinetics, nitrite oxidation, peroxidase
MeSH terms
Azides, Carbon Dioxide, Carbonates, Escherichia coli, Free Radicals, Models, Molecular, Nitro Compounds, Superoxide Dismutase, Tyrosine, Catalytic Domain, Peroxynitrous Acid, Biocatalysis

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