nitrogenase


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ni·tro·ge·nase

(nī'trō-jĕ-nās),
Formerly a general term used to describe enzyme systems that catalyze the reduction of molecular nitrogen to ammonia in nitrogen-fixing bacteria; now specifically applied to enzymes that carry out this reaction with reduced ferredoxin and ATP; typically nitrogenase consists of two components, the first of which reduces N2 whereas the second transfers electrons.

nitrogenase

(nī-trŏj′ə-nās′, -nāz′, nī′trə-jə-)
n.
An enzyme of nitrogen-fixing bacteria that catalyzes the conversion of nitrogen to ammonia.

ni·tro·ge·nase

(nī-troj'ĕ-nās)
A term for enzyme systems that catalyze the reduction of molecular nitrogen to ammonia in nitrogen-fixing bacteria with reduced ferredoxin and ATP.

nitrogenase

(nī′trō-jĕn-ās) [ nitrogen + -ase, enzyme]
An enzyme that catalyzes the reduction of nitrogen to ammonia.
References in periodicals archive ?
It is the process in which N2 is reduced to ammonium (NH4+) by nitrogenase enzyme.
102,103) Growth and reproduction of diazotrophic cyanobacteria require large amounts of the micronutrients such as iron and molybdenum because the nitrogenase contains up to 36 iron and 2 molybdenum atoms in a single enzyme to facilitate electron transfer reactions.
Arnone JA, Kohls SJ, Baker DD (1994) Nitrate effects on nodulation and nitrogenase activity of actinorhizal Casuarina studied in split-root systems.
Roper MM (1983) Field measurements of nitrogenase activity in soils amended with wheat straw.
To make sense of what he was seeing, Wang reviewed other studies and discovered that the unusual spectra closely resembled those seen with another enzyme, nitrogenase, which also has a metal-sulfur core and also acts as a reductase.
Molybdenum is important in the nutrition of legumes, as it is essential for the activity of the enzyme nitrogenase (Singh et al.
1988 An influence of plant growth substances on growth and nitrogenase activity from Azospirillum brasilense, p 141-149 In W Klingmuller (ed ), Azospirillum IV Berlin: Springer-Verlag
INTERACTION OF MOLYBDENUM(VI)-CITRIC ACID IN AQUEOUS SOLUTIONS TO MIMIC THE NITROGENASE COFACTOR.
The overall reaction that involves the nitrogenase bacterial enzyme is
The genes would have to be expressed in an environment amenable to nitrogen fixation where the enzyme, nitrogenase, could be protected from oxygen and where the enzyme system could tap into the sources of reductant and energy from the plant.
Molybdenum (Mo) is necessary for the enzymes that reduce nitrate in plants and for the enzyme nitrogenase which is the key enzyme in biological nitrogen fixation (2).
14) This subtype shares sequence homologies with enterobacterial antigens such as Klebsiella pneumoniae nitrogenase.