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N2 Fixation by Streptomyces thermoautotrophicus Involves a Molybdenum-Dinitrogenase and a Manganese-Superoxide Oxidoreductase That Couple N2Reduction to the Oxidation of Superoxide Produced from O2by a Molybdenum-CO Dehydrogenase
Open accessAbstract
N2 fixation by Streptomyces thermoautotrophicus follows the equation N2 + 4-12MgATP + 8H+ + 8e- --> 2NH3 + H2 + 4-12MgADP + 4-12Pi and exhibits features which are not obvious in the diazotrophic bacteria studied so far. The reaction is coupled to the oxidation of carbon monoxide (CO) by a molybdenum-containing CO dehydrogenase that transfers the electrons derived from CO oxidation to O2, thereby producing superoxide anion radicals (O-2). A manganese-containing superoxide oxidoreductase reoxidizes the O-2 anions to O2 and transfers the electrons to a MoFeS-dinitrogenase for the reduction of N2 to ammonium. Among the most striking properties of the S. thermoautotrophicus nitrogenase system are the dependence on O2 and O-2, the complete insensitivity of all components involved toward O2 and H2O2, the inability to reduce ethine or ethene, and a low MgATP requirement. In addition, the subunit structure of the S. thermoautotrophicus nitrogenase components and the polypeptides involved seem to be dissimilar from the known nitrogenases.
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Cites
Superoxide dismutase: Improved assays and an assay applicable to acrylamide gels
Beauchamp, C., & Fridovich, I. (1971) · Analytical Biochemistry · doi:10.1016/0003-2697(71)90370-8 · Cited by 12,892
Structure–function relationships of alternative nitrogenases
Eady, R. R. (1996) · Chemical Reviews · doi:10.1021/cr950057h · Cited by 877
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Proterozoic Ocean Chemistry and Evolution: A Bioinorganic Bridge?
Anbar, A. D., & Knoll, A. H. (2002) · Science · doi:10.1126/science.1069651 · Cited by 1,191
Nitrogen fixation and hydrogen metabolism in cyanobacteria
Bothe, H., Schmitz, O., Yates, M. G., & Newton, W. E. (2010) · Microbiology and Molecular Biology Reviews · doi:10.1128/mmbr.00033-10 · Cited by 416
Nitrogen Fixation in Agriculture, Forestry, Ecology, and the Environment
(2005) · Springer eBooks · doi:10.1007/1-4020-3544-6 · Cited by 282
Primary metabolism and its control in streptomycetes: A most unusual group of bacteria
Hodgson, D. A. (2000) · Advances in Microbial Physiology · doi:10.1016/s0065-2911(00)42003-5 · Cited by 267
How oxygen damages microbes: Oxygen tolerance and obligate anaerobiosis
(2002) · Advances in Microbial Physiology · doi:10.1016/s0065-2911(02)46003-1 · Cited by 259
Metadata
- Authors
- Ribbe, M., Gadkari, D., & Meyer, O.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1997-10
- Volume
- 272
- Issue
- 42
- Pages
- 26627-26633
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W2135938280
- Cited by
- 205
- References
- 2
- FWCI
- 6.56
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- CoChat. (2026). Citation check: N2 Fixation by Streptomyces thermoautotrophicus Involves a Molybdenum-Dinitrogenase and a Manganese-Superoxide Oxidoreductase That Couple N2Reduction to the Oxidation of Superoxide Produced from O2by a Molybdenum-CO Dehydrogenase. https://app.cochat.ai/papers/10.1074/jbc.272.42.26627
- The paper
- Ribbe, M., Gadkari, D., & Meyer, O. (1997). N2 Fixation by Streptomyces thermoautotrophicus Involves a Molybdenum-Dinitrogenase and a Manganese-Superoxide Oxidoreductase That Couple N2Reduction to the Oxidation of Superoxide Produced from O2by a Molybdenum-CO Dehydrogenase. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.272.42.26627
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