Results 281 to 290 of about 50,424 (297)

Functional domains of assimilatory nitrate reductases and nitrite reductases

Trends in Biochemical Sciences, 1990
Biochemical investigation of nitrate assimilation enzymes spans the past four decades. With the molecular cloning of genes for nitrate reductases and nitrite reductases, exciting new prospects are developing for the study of these enzymes. As large, complex enzymes with multiple redox centers, these two types of reductases should help us gain ...
Wilbur H. Campbell, James R. Kinghorn
openaire   +3 more sources

[23] Ferredoxin-nitrite reductase

1980
Publisher Summary This chapter describes ferredoxin-nitrite reductase. Ferredoxin-nitrite reductase (EC 1.7.7.1) is the second enzyme component of the photosynthetic nitrate-reducing system. It was first identified as a ferredoxin-dependent chloroplast enzyme which catalyzes the 6-electron reduction of nitrite to ammonia.
Jacobo Cárdenas, José M. Vega, M. Losada   +2 more
openaire   +2 more sources

Stoichiometry of nitrite reduction catalyzed by Pseudomonas aeruginosa nitrite-reductase

Biochimie, 1984
The stoichiometry of the reduction of nitrite catalyzed by Pseudomonas aeruginosa nitrite-reductase (cytochrome cd1) has been shown to yield nitrous oxide as the final product. Gas chromatography experiments demonstrated that nitric oxide is also formed as a free intermediate. A sequential formation of NO and N2O is discussed as opposed to the parallel
Yann Henry, Philippe Bessières
openaire   +3 more sources

The induction of nitrite reductase in Neurospora crassa

Biochimica et Biophysica Acta (BBA) - General Subjects, 1972
Abstract Like nitrate reductase, nitrite reductase in Neurospora crassa is induced by either nitrate of nitrite and is repressed by ammonia. None of the enzymatic activities associated with the nitrite reductase, i.e. NADPH-nitrite reductase, reduced benzyl viologen-nitrite reductase or NADPH-hydroxylamine reductase, were derepressible when ...
openaire   +3 more sources

Bidirectional Catalysis by Copper-Containing Nitrite Reductase

Biochemistry, 2004
The copper-containing nitrite reductase from Alcaligenes faecalis S-6 was found to catalyze the oxidation of nitric oxide to nitrite, the reverse of its physiological reaction. Thermodynamic and kinetic constants with the physiological electron donor pseudoazurin were determined for both directions of the catalyzed reaction in the pH range of 6-8.
Wijma, H.J., Canters, G.W., Vries, S. de, Verbeet, M.P.   +3 more
openaire   +4 more sources

DFT Study on Nitrite Reduction Mechanism in Copper-Containing Nitrite Reductase

Biochemistry, 2015
Dissimilatory reduction of nitrite by copper-containing nitrite reductase (CuNiR) is an important step in the geobiochemical nitrogen cycle. The proposed mechanisms for the reduction of nitrite by CuNiRs include intramolecular electron and proton transfers, and these two events are understood to couple.
Juha M. Lintuluoto, Masami Lintuluoto
openaire   +3 more sources

A novel enzyme electrode method for the determination of nitrite based on nitrite reductase

Analytica Chimica Acta, 1975
The enzyme, nitrite reductase, can be extracted and purified from spinach leaves; the freeze-dried preparation is completely stable for at least 4 months if kept in a freezer. The enzyme catalyzes the reduction of nitrite to ammonia in the presence of reduced methyl viologen as electron donor.
Chih-Hen. Kiang, George G. Guilbault, Shia S. Kuan   +2 more
openaire   +3 more sources

Application of nitrite reductase from Alcaligenes faecalis S-6 for nitrite measurement

Biosensors and Bioelectronics, 1998
The enzymatic reaction of nitrite reductase (NIR) from Alcaligenes faecalis S-6 was applied to the measurement of nitrite. NIR was immobilized on the surface of a gold electrode using filter paper and a dialysis membrane, and used as a working electrode in a three-electrode system. Amperometric methods were applied using NIR and the electron mediator 1-
Isao Karube, Makoto Nishiyama, Sueharu Horinouchi, Nobuko Hirota, Satoshi Sasaki, Teruhiko Beppu, Mutsuko Kukimoto, Yoshiko Arikawa   +7 more
openaire   +3 more sources

ChemInform Abstract: INTERCONVERSION OF NITRITE AND AMMONIA: PROGRESS TOWARD A MODEL FOR NITRITE REDUCTASE

Chemischer Informationsdienst, 1982
AbstractMittels cyclischer Voltammetrie in wäßriger gepufferter Lösung bei pH 4.6 wird die Reduktion des koordinierten Nitrosyls im Komplex (I) zu Ammoniak in (II) untersucht.
W. R. Jun. Murphy, Kenneth J. Takeuchi, Thomas J. Meyer   +2 more
openaire   +3 more sources

Is Nitrite Reductase Essential in the Metabolism of Nitrogen in Plants?

1998
Nitrite reductase (NiR) is the second enzyme in the primary assimilation pathway of nitrate to catalyze six-electron reduction of nitrite to ammonia, and thus this enzyme is essential in assimilatory nitrate reduction in plants. We have been studying the assimilation of nitrate and nitrogen dioxide in transgenic Arabidopsis thaliana plants that ...
Takahashi, M., Caboche, Michel, Morikawa, Naoto   +2 more
openaire   +3 more sources