Nitrogenases are enzymes (EC 1.18.6.1EC 1.19.6.1) that are produced by certain bacteria, such as cyanobacteria (blue-green bacteria) and rhizobacteria...
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Nitrogen fixation (section Nitrogenase)
Biological nitrogen fixation or diazotrophy is catalyzed by enzymes called nitrogenases. These enzyme complexes are encoded by the Nif genes (or Nif homologs)...
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Vanadium nitrogenase is a key enzyme for nitrogen fixation found in nitrogen-fixing bacteria, and is used as an alternative to molybdenum nitrogenase when...
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Azotobacter (section Nitrogenase)
that of Mo-Fe nitrogenase. An important role in maturation of Mo-Fe nitrogenase plays the so-called P-cluster. Synthesis of nitrogenase is controlled...
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the air using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis. Nitrogenase is inactivated by oxygen...
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FeMoco (FeMo cofactor) is the primary cofactor of nitrogenase. Nitrogenase is the enzyme that catalyzes the conversion of atmospheric nitrogen molecules...
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Nitrogenase (flavodoxin) (EC 1.19.6.1) is an enzyme with systematic name reduced flavodoxin:dinitrogen oxidoreductase (ATP-hydrolysing). This enzyme catalyses...
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Azotobacter vinelandii (section Nitrogenase)
vitamins in soils. It produces fluorescent pyoverdine pigments. The nitrogenase holoenzyme of A. vinelandii has been characterised by X-ray crystallography...
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require additional metals as enzyme cofactors, such as vanadium in the nitrogenase of the nitrogen-fixing bacteria of the genus Azotobacter, tungsten in...
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living organisms. The primary enzyme encoded by the nif genes is the nitrogenase complex which is in charge of converting atmospheric nitrogen (N2) to...
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is a component in most nitrogenases. Among molybdoenzymes, nitrogenases are unique in lacking the molybdopterin. Nitrogenases catalyze the production...
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coenzyme Q – cytochrome c reductase, succinate – coenzyme Q reductase and nitrogenase. Iron–sulfur clusters are best known for their role in the oxidation-reduction...
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"Nitrogenase". Ergebnisse der Enzymforschung. 3: 23–56. Lineweaver H, Burk D, Deming, W E (1934). "The dissociation constant of nitrogen-nitrogenase in...
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Serena DeBeer (section Nitrogenase)
to identify the central carbon atom in FeMo cofactor of Nitrogenase (see section Nitrogenase). The DeBeer group is actively involved in the development...
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Bioorganometallic enzymes and proteins include the hydrogenases, FeMoco in nitrogenase, and methylcobalamin. These naturally occurring organometallic compounds...
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course must be determined separately. The image at left for catalysis by nitrogenase from Klebsiella pneumoniae illustrates both of these points: the agreement...
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1970s, ferredoxin was demonstrated to contain Fe4S4 clusters and later nitrogenase was shown to contain a distinctive MoFe7S9 active site. The Fe-S clusters...
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an essential element in most organisms. It is most notably present in nitrogenase which is an essential part of nitrogen fixation. Molybdenum is an essential...
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Azospirillum. All diazotrophs contain iron-molybdenum or iron-vanadium nitrogenase systems. Two of the most studied systems are those of Klebsiella pneumoniae...
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constant of nitrogen-nitrogenase in Azobacter". J. Amer. Chem. Soc. 56: 225–230. doi:10.1021/ja01316a071. Burk, D. "Nitrogenase". Ergebnisse der Enzymforschung...
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in the root nodules would reduce the activity of the oxygen-sensitive nitrogenase, which is an enzyme responsible for the fixation of atmospheric nitrogen...
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which serve as electron shuttles in cells. In bacteria, the important nitrogenase enzymes contain an Fe–Mo–S cluster and is a catalyst that performs the...
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breaking the very stable triple bond between the nitrogen atoms. The nitrogenases catalyze the process. One such enzyme occurs in Rhizobium bacteria. There...
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example, diazotrophs have the ability to fix nitrogen gas using the enzyme nitrogenase. This trait, which can be found in bacteria of most metabolic types listed...
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also a nitrogen fixing bacterium, i.e., it can express and regulate nitrogenase, a protein complex that can catalyse the conversion of atmospheric dinitrogen...
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organisms, ammonia is produced from atmospheric nitrogen by enzymes called nitrogenases. The overall process is called nitrogen fixation. Intense effort has...
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pectin-degrading cell wall enzymes. The enzymes needed to reduce nitrogen, nitrogenases, require a substantial input of ATP but at the same time are sensitive...
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required for life. The iron–sulfur clusters are pervasive and include nitrogenase, the enzymes responsible for biological nitrogen fixation. Iron-containing...
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central metal cation, illustrate how N2 might bind to the metal(s) in nitrogenase and the catalyst for the Haber process: these processes involving dinitrogen...
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hydrocarbon substrate): R-H + Br− + H2O2 → R-Br + H2O + OH− A vanadium nitrogenase is used by some nitrogen-fixing micro-organisms, such as Azotobacter...
75 KB (8,503 words) - 18:56, 4 August 2024