Results 251 to 260 of about 91,152 (296)

The nitrate reductase of Chlorella pyrenoidosa

Biochimica et Biophysica Acta (BBA) - Enzymology, 1971
Abstract 1. 1. A nitrate reductase (NADH:nitrate oxidoreductase, EC 1.6.6.1), which catalyzes the reduction of nitrate to nitrite by NADH, has been found to be present in fresh extracts of nitrate-grown Chlorella pyrenoidosa in the form of a precursor of low activity.
B, Vennesland, C, Jetschmann
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The Prokaryotic Nitrate Reductases

2007
This chapter reviews the structural organization and bioenergetics of the four prokaryotic NO3 reductases and the eukaryotic enzyme and explores the possible mechanisms of NO3 transport. The membrane-bound NO3- reductase with the active site facing the cytoplasm is usually a three-subunit enzyme composed of NarGHI.
Richardson, David J., Van Spanning, Rob J.M., Ferguson, Stuart J.   +2 more
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Properties of a nitrate reductase of Chlorella

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1972
Abstract 1. An NADH-nitrate oxidoreductase (EC 1.6.6.1) of Chlorella has the unusual property of existing in cell-free extracts mainly in the form of an inactive precursor which can be activated by a variety of procedures. This enzyme is associated with a cytochrome of the b type. 2. The inhibitors, azide, cyanate, thiocyanate and nitrite, react
L P, Solomonson, B, Vennesland
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Nitrate reductases inEscherichia coli

Antonie van Leeuwenhoek, 1994
Escherichia coli expresses two different membrane-bound respiratory nitrate reductases, nitrate reductase A (NRA) and nitrate reductase Z (NRZ). In this review, we compare the genetic control, biochemical properties and regulation of these two closely related enzyme systems.
V, Bonnefoy, J A, Demoss
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Histochemical localization of nitrate reductase

Histochemistry, 1981
NADH-dependent nitrate reductase (E.C. 1.6.6.1) was ultrastructurally localized in norflurazon-treated and control soybean cotyledons [Glycine max (L.) Merr.] by a method based upon the increase in osmiophilia due to the formation of an azo dye. The reaction product was observed in small vesicles throughout the cytoplasm.
K C, Vaughn, S O, Duke
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Reductive activation of nitrate reductases

Dalton Transactions, 2005
Protein film voltammetry of Paracoccus pantotrophus respiratory nitrate reductase (NarGH) and Synechococcus elongatus assimilatory nitrate reductase (NarB) shows that reductive activation of these enzymes may be required before steady state catalysis is observed.
Field, Sarah J., Thornton, Nicholas P., Anderson, Lee J., Gates, Andrew J., Reilly, Ann, Jepson, Brian J. N., Richardson, David J., George, Simon J., Cheesman, Myles R., Butt, Julea N.   +9 more
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Activation of nitrate reductase by oxidation

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1972
Abstract The activation of the inactive form of the nitrate reductase (NADH: nitrate oxidoreductase, EC 1.6.6.1) present in cell-free extracts of Chlorella vulgaris Beijerinck requires an oxidizing agent. Ferricyanide causes conversion of the proenzyme to active enzyme within a few minutes, even at 0°C. Molecular oxygen causes a slow activation which
K, Jetschmann, L P, Solomonson, B, Vennesland   +2 more
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[Induced activity of nitrate reductase by nitrate and cloning of nitrate reductase gene].

Sheng wu gong cheng xue bao = Chinese journal of biotechnology, 2010
Excessive nitrate accumulated in plants affects vegetable quality severely and excessive nitrate ingestion would do harm to human health. Assimilatory NADH: nitrate reductase (NR, EC 1.6.6.1), a complex Mo-pterin-, cytochrome b(557)- and FAD-containing protein, catalyzes the regulated and rate-limiting step in the utilization of inorganic nitrogen by ...
Li-Qun, Wang, Yong, Wang, Ying, Dong, Wen-Bing, Wang   +3 more
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Bacterial dimethyl sulphoxide reductases and nitrate reductases

Biochemical Society Transactions, 1991
interactions which can be done when more structural information is available, but they do provide order of magnitude estimates of interaction strengths. Evidently, considerable rearrangement of charge driven by reduction significantly raises the effective dielectric. It seems likely that centres S-2 and FR-2 are apparently low-potential clusters merely
McEwan, Alastair G., Benson, Neil, Bonnett, Tracey C., Hanlon, Steven P., Ferguson, Stuart J., Richardson, David J., Jackson, J. Baz   +6 more
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The bacterial nitrate reductases: EPR studies on nitrate reductase A from Micrococcus denitrificans

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1972
EPR studies on nitrate reductase indicate at 80 °K a signal at g=1.985 and g=2.045 attributable to Mo(V). At 15 °K a signal is observed at g=2.016 due to Fe(III) in an unknown symmetry. The reaction of nitrate reductase with nitrate, nitrite or azide results in changes of the Mo(V) signal.
P, Forget, D V, Dervartanian
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