Results 271 to 280 of about 347,780 (327)

A dissimilatory nitrite reductase in Paracoccus halodenitrificans

Archives of Microbiology, 1984
Paracoccus halodenitrificans produced a membrane-associated nitrite reductase. Spectrophotometric analysis showed it to be associated with a cd-cytochrome and located on the inner side of the cytoplasmic membrane. When supplied with nitrite, membrane preparations produced nitrous oxide and nitric oxide in different ratios depending on the electron ...
M A, Grant, L I, Hochstein
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[44] Nitrite reductase

1971
Publisher Summary This chapter discusses the determination of nitrite reductase. The usual assay involves sodium dithionite as reductant and either ferredoxin or its artificial substitute, methyl viologen, as the electron carrier. Enzymatic activity can be best followed by measuring colorimetrically the rate of disappearance of nitrite.
Manuel Losada, Antonio Paneque
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Structure of cytochrome c nitrite reductase

Nature, 1999
The enzyme cytochrome c nitrite reductase catalyses the six-electron reduction of nitrite to ammonia as one of the key steps in the biological nitrogen cycle, where it participates in the anaerobic energy metabolism of dissimilatory nitrate ammonification.
Einsle, Oliver, Messerschmidt, Albrecht, Stach, Petra, Bourenkov, Gleb P., Bartunik, Hans D., Huber, Robert, Kroneck, Peter M. H.   +6 more
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A spectrophotometric assay for dissimilatory nitrite reductases

Analytical Biochemistry, 1988
A spectrophotometric assay for dissimilatory nitrite reductases has been developed utilizing mammalian cytochrome c (equine heart) as reductant and spectrophotometric agent. The copper-containing nitrite reductase from Achromobacter cycloclastes has been shown to have apparent Km's for reduced cytochrome c and nitrite of 86 +/- 5 and 5.63 +/- 0.03 ...
C L, Hulse, J M, Tiedje, B A, Averill
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Inheritance of Nitrite Reductase

1981
Although nitrite reductase (NiR) resides primarily in the chloroplast (Dalling et al., 1972; Lips et al., 1972; Miflin, 1974; Ritenour et al., 1967; Washitani et al., 1977) it has not been determined whether this enzyme is coded for by chloroplast DNA or by nuclear DNA.
S. Heath-Pagliuso, R. C. Huffaker
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Octaheme nitrite reductases: Structure and properties

Biochemistry (Moscow), 2012
Octaheme oxidoreductases are widespread among various bacterial taxa involved in the biogeochemical nitrogen cycle. The evolution of octaheme oxidoreductases of the nitrogen cycle from the evolutionarily more ancient pentaheme nitrite reductases was accompanied by changes in function from reduction of nitrogen oxides to their oxidation under changing ...
T V, Tikhonova, A A, Trofimov, V O, Popov   +2 more
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A nitrite reductase from Neurospora crassa

Biochimica et Biophysica Acta, 1960
Abstract Nitrite reductase has been purified, over 50-fold from ordinary felts of Neurospora crassa, macroconidial wild type Em 5297a. The enzyme is a DPNH-dependent flavoprotein containing FAD, Fe and Cu and -SH groups. Copper may act by coupling the flavin component of the enzyme to nitrite since an external supply of Cu1+ reduced NO2 non ...
D J, NICHOLAS, A, MEDINA, O T, JONES
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The anoxic plant mitochondrion as a nitrite: NO reductase

Mitochondrion, 2011
Under the conditions of oxygen deprivation, accumulating nitrite can be reduced in the mitochondrial electron transport chain forming free radical nitric oxide (NO). By reducing nitrite to NO, plant mitochondria preserve the capacity to oxidize external NADH and NADPH and retain a limited power for ATP synthesis complementing glycolytic ATP production.
Kapuganti J, Gupta, Abir U, Igamberdiev
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Ferredoxin-nitrite reductase from spinach

Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation, 1966
Summary 1. Nitrite reductase from a crude homogenate of spinach leaves has been purified about 500-fold and freed from NADP-reductase (EC 1.6.99.4) and nitrate reductase (EC 1.6.6.2). The enzyme, which does not seem to be a flavoprotein, catalyzes the reduction of nitrite to ammonia with a variety of enzyme systems as electron donors and requires
J M, Ramírez, F F, Del Campo, A, Paneque, M, Losada   +3 more
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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 ...
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