nitrogenasen.
/nʌɪˈtrɒdʒᵻneɪz/, U.S. /ˈnaɪtrədʒəˌneɪz/, /naɪˈtrɑdʒəˌneɪz/, /ˈnaɪtrədʒəˌneɪs/, /naɪˈtrɑdʒəˌneɪs/ Biochemistry.
Any of a class of complex enzymes (typically containing iron and molybdenum atoms) which bring about the conversion of molecular nitrogen into ammonium ions, as the first step in biological nitrogen fixation.
ΚΠ
1934 D. Burk in Ergebnisse der Enzymforschung 3 24 Nitrogenase is the specific enzyme within the azotase system that combines directly with N2 with characteristic affinity.
1950 Federation Proc. (Federation Amer. Soc. Exper. Biol.) 9 548/1 The remarkable effect of molecular nitrogen appears to require activation of nitrogenase which in some way results in simultaneous activation of the dehydrogenases which are thereby enabled to compete successfully with the hydrogenase systems.
1988 BioFactors 1 111/1 Since their isolation in the 1960s, all the purified nitrogenases were shown to be comprised of a molybdoprotein (a MoFe protein encoded by the nifD and nifK genes) and an iron-containing protein (the Fe protein encoded by the nifD gene).
This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).
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