Cited by 301Redox biology and oxidative stressMetal-Catalyzed Oxygenation MechanismsMetalloenzymes and iron-sulfur proteins

Mechanism of superoxide and hydrogen peroxide formation by fumarate reductase, succinate dehydrogenase, and aspartate oxidase

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Messner, Kevin R., Imlay, James A.·2002·Journal of Biological Chemistry

Abstract

Oxidative stress is created in aerobic organisms when molecular oxygen chemically oxidizes redox enzymes, forming superoxide (O2*-) and hydrogen peroxide (H2O2). Prior work identified several flavoenzymes from Escherichia coli that tend to autoxidize. Of these, fumarate reductase (Frd) is notable both for its high turnover number and for its production of substantial O2*- in addition to H2O2. We have sought to identify characteristics of Frd that predispose it to this behavior. The ability of excess succinate to block autoxidation and the inhibitory effect of lowering the flavin potential indicate that all detectable autoxidation occurs from its FAD site, rather than from iron-sulfur clusters or bound quinones. The flavin adenine dinucleotide (FAD) moiety of Frd is unusually solvent-exposed, as evidenced by its ability to bind sulfite, and this may make it more likely to react adventitiously with O2*-. The autoxidizing species is apparently fully reduced flavin rather than flavosemiquinone, since treatments that more fully reduce the enzyme do not slow its turnover number. They do, however, switch the major product from O2*- to H2O2. A similar effect is achieved by lowering the potential of the proximal [2Fe-2S] cluster. These data suggest that Frd releases O2*- into bulk solution if this cluster is available to sequester the semiquinone electron; otherwise, that electron is rapidly transferred to the nascent superoxide, and H2O2 is the product that leaves the active site. This model is supported by the behavior of "aspartate oxidase" (aspartate:fumarate oxidoreductase), an Frd homologue that lacks Fe-S clusters. Its dihydroflavin also reacts avidly with oxygen, and H2O2 is the predominant product. In contrast, succinate dehydrogenase, with high potential clusters, generates O2*- exclusively. The identities of enzyme autoxidation products are significant because O2*- and H2O2 damage cells in different ways.

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  1. McCord, J. M., Keele, B. B., Jr., and Fridovich, I. (1971) Proc. Natl. Acad. Sci.
  2. Liochev, S. I., and Fridovich, I. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 5892-5896
  3. Keyer, K., and Imlay, J. A. (1996) Proc. Natl. Acad. Sci. U. S. A. 93, 13635-13640
  4. Ackrell, B. A. C., Johnson, M. K., Gunsalus, R. P., and Cecchini, G. (1992) in Chemistry and Biochemistry of Flavoproteins (Muller, F., ed) Vol. 3, pp. 229 -297, CRC Press, Inc., Boca Raton, FL 21.
  5. Silvius, J. R., and McElhaney, R. N. (1980) Proc. Natl. Acad. Sci. U. S. A. 77, 1255-1259
  6. Werth, M. T., Cecchini, G., Manodori, A., Ackrell, B. A. C., Schroder, I., Gunsalus, R. P., and Johnson, M. K. (1990) Proc. Natl. Acad. Sci. U. S. A. 87, 8965-8969

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Authors
Messner, K. R., & Imlay, J. A.
Affiliations
University of Illinois Urbana-Champaign (US)
Corresponding author
Imlay, James A.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-11
Volume
277
Issue
45
Pages
42563-42571
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2044412059
Cited by
301
References
57
Citations by year
2026: 9 · 2025: 4 · 2024: 12 · 2023: 11 · 2022: 15 · 2021: 14 · 2020: 18 · 2019: 13 · 2018: 17 · 2017: 14 · 2016: 8 · 2015: 12 · 2014: 16 · 2013: 21 · 2012: 18
FWCI
3.36
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (GM49640)
  • National Institute of General Medical Sciences (R01GM049640, GM 49640, T32 GM07283-20, T32GM007283)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Metalloenzymes and iron-sulfur proteins
Keywords
fumarate reductase, succinate dehydrogenase, superoxide production, hydrogen peroxide production, FAD, flavin semiquinone, [2Fe-2S] cluster, oxidative stress, Escherichia coli
MeSH terms
Amino Acid Oxidoreductases, Cell Line, Cell Membrane, Escherichia coli, Flavin-Adenine Dinucleotide, Hydrogen Peroxide, Iron-Sulfur Proteins, Kinetics, Oxidation-Reduction, Solvents, Succinate Dehydrogenase, Superoxides, D-Aspartate Oxidase

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