Results 341 to 350 of about 558,186 (382)

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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A method for the determination of nitrate reductase

Journal of Biochemical and Biophysical Methods, 1981
A procedure for the assay of nitrate reductase based on Szekely's diaminodiphenylsulphone method of nitrate determination (Szekely, E. (1967) Talanta 14, 941-950) is described. The method is simple and sensitive, allowing determination of 1 microgram of nitrate in a volume of 1 ml or less.
Roy M. Daniel, M.P. Curran
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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
Larry P. Solomonson, Klaus Jetschmann, Birgit Vennesland   +2 more
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INDEPENDENT EFFECTS OF PHYTOCHROME AND NITRATE ON NITRATE REDUCTASE AND NITRITE REDUCTASE ACTIVITIES IN MAIZE [PDF]

Photochemistry and Photobiology, 1984
Abstract— Involvement of phytochrome in the regulation of nitrate reductase (NR) and nitrite reductase (NIR) activities in excised, etiolated leaves of Zea mays (L.) variety ‘Ganga‐5’ is demonstrated using low energy and high irradiance responses of phytochrome action.
Arun Sharma, Sudhir K. Sopory
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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.
Daniel V. DerVartanian, P. Forget
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NITRATE REDUCTASE STRUCTURE, FUNCTION AND REGULATION: Bridging the Gap between Biochemistry and Physiology.

Annual Review of Plant Physiology and Plant Molecular Biology, 1999
Nitrate reductase (NR; EC 1.6.6.1-3) catalyzes NAD(P)H reduction of nitrate to nitrite. NR serves plants, algae, and fungi as a central point for integration of metabolism by governing flux of reduced nitrogen by several regulatory mechanisms.
W. Campbell
semanticscholar   +1 more source

Evolution of the soluble nitrate reductase: defining the monomeric periplasmic nitrate reductase subgroup

Biochemical Society Transactions, 2006
Bacterial nitrate reductases can be classified into at least three groups according to their localization and function, namely membrane-bound (NAR) or periplasmic (NAP) respiratory and cytoplasmic assimilatory (NAS) enzymes. Monomeric NASs are the simplest of the soluble nitrate reductases, although heterodimeric NASs exist, and a common structural ...
Jepson, B. J. N., Marietou, A., Mohan, S., Cole, J. A., Butler, C. S., Richardson, D. J.   +5 more
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Molecular evolution of nitrate reductase genes

Journal of Molecular Evolution, 1996
To understand the evolutionary mechanisms and relationships of nitrate reductases (NRs), the nucleotide sequences encoding 19 nitrate reductase (NR) genes from 16 species of fungi, algae, and higher plants were analyzed. The NR genes examined show substantial sequence similarity, particularly within functional domains, and large variations in GC ...
Jizhong Zhou, Andris Kleinhofs
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RNA silencing in the model mycorrhizal fungus Laccaria bicolor: gene knock-down of nitrate reductase results in inhibition of symbiosis with Populus.

Environmental Microbiology, 2009
Mycorrhizal symbioses are a rule in nature and may have been crucial in plant and fungal evolution. Ectomycorrhizas are mutualistic interactions between tree roots and soil fungi typical of temperate and boreal forests.
M. Kemppainen, S. Duplessis, F. Martin, A. Pardo   +3 more
semanticscholar   +1 more source