nitrite reductase


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nitrite reductase

an ENZYME that catalyses the conversion of nitrite to ammonium hydroxide.
References in periodicals archive ?
Complete nitrate removal was found at high Mn(II)/Fe(II) molar ratios, 30 [degrees]C, pH 7.0, and an electron donor/electron acceptor molar ratio of 3.00.Furthermore, In addition to the above, the findings showed that nitrate could be converted to nitrite and further be degraded to N2 by nitrite reductase (nirS).
The results showed that microorganisms 1, 3, 4, and 5 had nitrate reduction pathway because they had the enzymes nitrate reductase [1] and nitrite reductase [23].
Design and evaluation of primers targeting genes encoding NO-forming nitrite reductase: implications for ecological inference of denitrifying communities.
Morphological and Biochemical characterization of selected bacterial strains Properties MCPB1 MCPB2 MCPB3 MCPB4 Gram reaction + - + + Cell shape Thin rods Rods Thick rods Rods Colony color Cream Cream Dull white Cream Motility Non motile Non motile Non motile Non motile Catalase Test - - + + Oxidase Test - - - - Nitrate Reductase + + + + Nitrite Reductase - - - - Utilization of +/+ +/+ +/+ +/+ Glucose A/G Lactose A/G +/+ +/+ +/+ +/+ Sucrose A/G No acid/gas production.
The activation of [O.sub.2] for the monooxygenase reaction could also be achieved by nitric oxide (NO), the reaction product of nitrite reductase (NIR), which would result in [N.sub.2] gas production [2].
The absorbed nitrate is firstly reduced to nitrite by nitrate reductase (NR) and then reduced to ammonium by nitrite reductase (NiR).
The first step involved in acquiring N is the uptake system which is mediated by transporters (Orsel et al., 2002) followed by its reduction to NH + that constitutes first step of amino acid biosynthesis by enzymes nitrate reductase (NR) and nitrite reductase (NIR), respectively (Meyer and Stitt, 2001).
Effect of Escherichia coli wild type or its derivative with high nitrite reductase activity on in vitro ruminal methanogenesis and nitrate/nitrite reduction.
In shoot cells nitrate is reduced to nitrite by the enzyme nitrate reductase meanwhile the enzyme nitrite reductase converts some nitrate molecules into ammonium.
In addition, (1) whether a representative xenobiotic, phenol, was used as a carbon source, (2) an analysis of the bacterium's phylogenetic identity, and (3) the identity of the crucial gene necessary for denitrification (nitrite reductase) were conducted.
Nitrite Reductase. NiR catalyzes the reduction of nitrite to ammonium in the second step of the nitrate assimilation pathway.
Additionally, a recent body of work suggests that the deoxygenated form of Hb (deoxyHb) may actually serve to promote NO signaling by acting as a nitrite reductase, producing NO from nitrite as a precursor [17].