Cited by 122Redox biology and oxidative stressSelenium in Biological SystemsOrganoselenium and organotellurium chemistry

The Oxidation of Selenocysteine Is Involved in the Inactivation of Glutathione Peroxidase by Nitric Oxide Donor

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Asahi, Michio, Fujii, Junichi, Takao, Toshifumi, Kuzuya, Tsunehiko, Hori, Masatsugu, Shimonishi, Yasutsugu, Taniguchi, Naoyuki·1997·Journal of Biological Chemistry

Abstract

Glutathione peroxidase (GPx) was inactivated by S-nitroso-N-acetyl-D, L-penicillamine (SNAP), a nitric oxide donor (Asahi, M., Fujii, J., Suzuki, K., Seo, H. G., Kuzuya, T., Hori, M., Tada, M., Fujii, S., and Taniguchi, N. (1995) J. Biol. Chem. 270, 21035-21039). The structural basis of the inactivation was studied. We also show that 3-morpholinosydnonimine N-ethylcarbamide, a peroxynitrite precursor, as well as synthetic peroxynitrite also inactivated bovine GPx. The degree of incorporation of a sulfhydryl reagent, n-octyldithionitrobenzoic acid, into GPx decreased after pretreatment with SNAP as evidenced by mass spectrometry. To identify the modification site of this enzyme by SNAP, both SNAP-pretreated and untreated GPxs were reacted with n-octyldithionitrobenzoic acid and digested with lysylendopeptidase, and the resulting peptides were subjected to mass spectrometry. This technique identified a bridge between two peptides, one of which contains Sec45 at the catalytic center and Cys74, and the other contains Cys91. Although there are two possible combinations, selenocysteine 45 (Sec45) and Cys91 or Cys74 and Cys91, the tertiary structure of GPx indicates that a cross-link between Sec45 and Cys91 is more feasible. This is consistent with the experimental evidence that SNAP specifically inactivates GPx, in which Sec45 forms the catalytic center. Thus, we conclude that SNAP mainly oxidized Sec45 to form a selenenyl sulfide (Se-S) with a free thiol, leading to the inactivation of the enzyme. These data suggest that nitric oxide and its derivatives directly inactivate GPx in a specific manner via the production of a selenenyl sulfide, resulting in an increase in intracellular peroxides that are responsible for cellular damage.

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  • The redox-active selenocysteine site may also be a target for other free radical-mediated reactions, forming Se-NO in the presence of nitric oxide.

    “The redox-active Sec site may also be a target for other free radical-mediated reactions, forming Se-NO in the presence of NO· (19, 20).”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [20]

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Research works printed but not linked: 3

  1. Stamler, J. S., Jaraki, O., Osborne, J., Simon, D. I., Keaney, J., Vita, J., Singel, D., Valeri, C. R., and Loscalzo, J. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 7674 -7677
  2. Stamler, J. S., Simon, D. I., Osborne, J. A., Mullins, M. E., Jaraki, O., Michel, T., Singel, D., and Loscalzo, J. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 444 -448
  3. Beckman, J. S., Beckman, T. W., Chen, J., Marshall, P. A., and Freeman B. A. (1990) Proc. Natl. Acad. Sci. U. S. A. 87, 1620 -1624

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Authors
Asahi, M., Fujii, J., Takao, T., Kuzuya, T., Hori, M., Shimonishi, Y., & Taniguchi, N.
Affiliations
  • The University of Osaka (JP)
  • Institute for Protein Research, The University of Osaka (JP)
Corresponding author
Taniguchi, Naoyuki
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1997-08
Volume
272
Issue
31
Pages
19152-19157
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1966593481
Cited by
122
References
48
Citations by year
2026: 3 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 1 · 2020: 2 · 2019: 4 · 2018: 2 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 3 · 2013: 5 · 2012: 4
FWCI
3.20
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Mochida Memorial Foundation for Medical and Pharmaceutical Research
  • Japan Foundation for Aging and Health
  • Institute for Protein Research, Osaka University
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Organoselenium and organotellurium chemistry
Keywords
glutathione peroxidase, nitric oxide donors, enzyme inactivation, peroxynitrite, sulfhydryl modification, catalytic site
MeSH terms
Amino Acid Sequence, Glutathione Peroxidase, Molecular Sequence Data, Molsidomine, Nitrates, Nitric Oxide, Nitroprusside, Oxidation-Reduction, Apoptosis, Selenocysteine

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