Fd acts simultaneously as a bottleneck and as a hub which distributes high-energy electrons to a multitude of enzymes, which include nitrite reductase, sulphite reductase, fatty acid desaturase, glutamine-2-oxoglutarate amino transferase (GOGAT), redox complexes such as cytochrome b 6 /f for cyclic electron transport (CET) and thioredoxins 2 . (nature.com)
Nitrate3
An enzyme that catalyzes the oxidation of nitrite to nitrate. (lookformedical.com)
A ferredoxin that serves as the physiological electron donor to the nitrate and nitrite reductases in this assimilatory process has been characterized. (uea.ac.uk)
Ammonia4
The systematic name of this enzyme class is ammonia:ferredoxin oxidoreductase. (wikipedia.org)
Summary The recently discovered comammox process encompasses both nitrification steps, the aerobic oxidation of ammonia and nitrite, in a single organism. (osti.gov)
GSH, ASC and APX work in the so-called ASC-GSH cycle together with other enzymes, which include glutathione reductase (GR), dehydroascorbate reductase (DHAR) and monodehydroascorbate reductase (MDAR) [ 2 , 3 ]. (biomedcentral.com)
As part of one scientific family, he deals mainly with the area of Nitrogen assimilation, narrowing it down to issues related to the Nitrite reductase, and often Urea cycle, Arginase and Ferredoxin. (research.com)
Pyruvate1
The pulse of acetogenesis appears to have been collectively catalyzed by a number of different organisms and metabolisms, most prominently pyruvate:ferredoxin oxidoreductase. (frontiersin.org)
Protein5
In the last steps of this process transfer of energy-conserving electrons beyond photosystem I (PSI) is performed by a small iron-sulphur protein ferredoxin (Fd). (nature.com)
The electron paramagnetic resonance spectrum of the reduced form of the protein displayed a rhombic signal, with gx=1.91, gy=1.98, gz=2.07, that shows considerable similarity to plant and algal [2Fe-2S] ferredoxins. (uea.ac.uk)
Significantly, the Haloferax mediterranei ferredoxin was shown to be a highly thermostable protein. (uea.ac.uk)
Furthermore, structural analysis of Mm HCP C67Y and characterization of several Mm HCP variants with a Cys67 mutation reveal the significance of Cys67 in protein structure, metallocluster binding and hydroxylamine reductase activity. (nature.com)
Enzymes1
A group of enzymes that oxidize diverse nitrogenous substances to yield nitrite. (lookformedical.com)
Oxidation2
An enzyme found primarily in BACTERIA and FUNGI that catalyzes the oxidation of ammonium hydroxide to nitrite. (lookformedical.com)
Genomic comparison revealed high conservation of key metabolic features in sublineage II Nitrospira , including respiratory complexes I-V and the machineries for nitrite oxidation and carbon fixation via the reductive tricarboxylic acid cycle. (osti.gov)
Subunits1
Nitrogenase enzyme is a complex of two subunits: Dinitrogenase reductase and dinitrogenase. (biokaryon.com)
Enzyme that catalyzes1
In enzymology, a ferredoxin-nitrite reductase (EC 1.7.7.1) is an enzyme that catalyzes the chemical reaction NH3 + 2 H2O + 6 oxidized ferredoxin ⇌ {\displaystyle \rightleftharpoons } nitrite + 6 reduced ferredoxin + 7 H+ The 3 substrates of this enzyme are NH3, H2O, and oxidized ferredoxin, whereas its 3 products are nitrite, reduced ferredoxin, and H+. (wikipedia.org)
NADPH2
In photosynthesizing tissues, it uses ferredoxin that is reduced by PSI and in the root it uses a form of ferredoxin (FdIII) that has a less negative midpoint potential and can be reduced easily by NADPH. (wikipedia.org)
The dominant pathway in chloroplasts is, however, the one that produces NADPH, by the activity of ferredoxin NADP + oxidoreductase (FNR). (nature.com)
Electrons1
It participates in sulfate respiration coupled with phosphorylation by transferring electrons from the enzyme dehydrogenase to ferredoxin. (expasy.org)
Genes1
Lotus Japonicus como Modelo para la Identificaci n de Nuevos Genes Implicados en la Respuesta a Estr s Abi tico y Productividad en Leguminosas. (us.es)
Biological1
This review aims to describe the structural characteristics of superoxide reductases (SORs) and mechanistic aspects of biological superoxide anion reduction. (unl.pt)
Found1
The ferredoxin was found to contain approximately two atoms of iron and two atoms of sulphur, indicative of the binding of a [2Fe-2S] cluster. (uea.ac.uk)
The systematic name of this enzyme class is ammonia:ferredoxin oxidoreductase. (wikipedia.org)
In photosynthesis, final electron transfer from ferredoxin to NADP + is accomplished by the flavo enzyme ferredoxin:NADP + oxidoreductase (FNR). (nature.com)
The dominant pathway in chloroplasts is, however, the one that produces NADPH, by the activity of ferredoxin NADP + oxidoreductase (FNR). (nature.com)
The species Cu(II)(TRIL23H)32+ in aqueous solution can be reduced to Cu(I)(TRIL23H)3+ using ascorbate, and reoxidized by nitrite with production of nitric oxide. (ward-lab.ch)
Peptide1
At pH 5.8, with an excess of both the reductant (ascorbate) and the substrate (nitrite), the copper peptide Cu(II)(TRIL23H)32+ acts as a catalyst for the reduction of nitrite with at least five turnovers and no loss of catalytic efficiency after 3.7 h. (ward-lab.ch)
Electron2
Fd acts simultaneously as a bottleneck and as a hub which distributes high-energy electrons to a multitude of enzymes, which include nitrite reductase, sulphite reductase, fatty acid desaturase, glutamine-2-oxoglutarate amino transferase (GOGAT), redox complexes such as cytochrome b 6 /f for cyclic electron transport (CET) and thioredoxins 2 . (nature.com)
In particular, comprehensive descriptions of the biotin-containing decarboxylases and NAD:ferredoxin oxidoreductases are provided in this review, and the mechanisms of the recently discovered electron bifurcation are examined in detail. (frontiersin.org)
Bacteria2
is also generated during the nitrite respiration in several bacteria, including E. coli , by the activity of nitrite reductase [ 21 ]. (sciendo.com)
studied the aerobic respiration carried out by the facultative anaerobe Shewanella oneidensis MR-1, showing that in this species the aa 3 -type cytochrome c oxidase, which is the primary oxygen reductase in aerobiosis in many bacteria, does not appear to contribute to aerobic growth in Shewanella . (frontiersin.org)
Activity2
The possible physiological role of the nitrite reductase activity is discussed. (microbiologyresearch.org)
In this paper, we describe the spectroscopic characterization and catalytic activity of a de novo designed metallopeptide Cu(I/II)(TRIL23H)3+/2+, where Cu(I/II) is embeded in α-helical coiled coils, as a model for the CuT2 center of copper nitrite reductase. (ward-lab.ch)