Cited by 472Enzyme Structure and FunctionMetal-Catalyzed Oxygenation MechanismsProtein Structure and Dynamics

The structure of human mitochondrial manganese superoxide dismutase reveals a novel tetrameric interface of two 4-helix bundles

Borgstahl, Gloria E.O., Parge, Hans E., Hickey, Michael J., Beyer, Wayne F., Hallewell, Robert A., Tainer, John A.·1992·Cell

Abstract

The 2.2 A resolution crystal structure of recombinant human manganese superoxide dismutase, a homotetrameric enzyme that protects mitochondria against oxygen-mediated free radical damage, has been determined. Within each subunit, both the N-terminal helical hairpin and C-terminal alpha/beta domains contribute ligands to the catalytic manganese site. Two identical 4-helix bundles, symmetrically assembled from the N-terminal helical hairpins, form novel tetrameric interfaces that stabilize the active sites. Structurally altered polymorphic variants with reduced activity, such as tetrameric interface mutant Ile-58 to Thr, may produce not only an early selective advantage, through enhanced cytotoxicity of tumor necrosis factor for virus-infected cells, but also detrimental effects from increased mitochondrial oxidative damage, contributing to degenerative conditions, including diabetes, aging, and Parkinson's and Alzheimer's diseases.

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Crossref · 10.1016/0092-8674(92)90270-m

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89 of 89 references verified0 citation errors · 0 not checkable

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  • The active sites and structures of three MnSODs (human, Escherichia coli, and Deinococcus radiodurans) have been studied in detail.

    “The active sites and structures of three MnSODs (human, Escherichia coli, and Deinococcus radiodurans) have been studied in detail [80,81,82].”

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Authors
Borgstahl, G. E. O., Parge, H. E., Hickey, M. J., Beyer, W. F., Hallewell, R. A., & Tainer, J. A.
Affiliations
  • Scripps Research Institute (US)
  • Duke University (US)
Venue
Cell
Publisher
Elsevier BV
Published
1992-10
Volume
71
Issue
1
Pages
107-118
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2093212227
Cited by
472
References
89
Citations by year
2026: 9 · 2025: 10 · 2024: 18 · 2023: 13 · 2022: 11 · 2021: 17 · 2020: 9 · 2019: 15 · 2018: 21 · 2017: 19 · 2016: 15 · 2015: 12 · 2014: 26 · 2013: 17 · 2012: 16
FWCI
5.64
Type
journal article
Language
en
Open access
closed
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (GM-39345, R01GM039345)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
manganese superoxide dismutase, four-helix bundle, homotetramer, crystal structure, alpha/beta domain, polymorphic variants, mitochondrial oxidative damage, Parkinson's disease, Alzheimer's disease, diabetes mellitus, aging
MeSH terms
Amino Acid Sequence, Humans, Mitochondria, Models, Molecular, Molecular Sequence Data, Protein Conformation, Recombinant Proteins, Superoxide Dismutase, X-Ray Diffraction, Gene Library, Protein Structure, Secondary, Protein Structure, Tertiary

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