oxidase


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oxidase

 [ok´sĭ-dās]
any of a class of enzymes that catalyze the reduction of molecular oxygen independently of hydrogen peroxide.

ox·i·dase

(ok'si-dās),
Classically, one of a group of enzymes, now termed oxidoreductases (EC class 1), that bring about oxidation by the addition of oxygen to a metabolite or by the removal of hydrogen or of one or more electrons. Oxidase is now used for those cases in which O2 acts as an acceptor (of H or of electrons); those removing hydrogen are now termed dehydrogenases. For individual oxidases, see the specific names.

oxidase

(ŏk′sĭ-dās′, -dāz′)
n.
Any of a group of enzymes that catalyze oxidation, especially an enzyme that reacts with molecular oxygen to catalyze the oxidation of a substrate.

ox′i·da′sic adj.

ox·i·dase

(ok'si-dās)
One of a group of enzymes that bring about organic reactions in which O2 acts as an acceptor (of H or of electrons).

oxidase

an enzyme that catalyses a reaction in which oxygen is added to a substance (X) with hydrogen removed and water formed. Thus:

Most oxidases are proteins with metallic groups attached. For example, cytochrome oxidase contains iron and oxidizes cytochrome a in the ELECTRON TRANSPORT SYSTEM of aerobic respiration:

References in periodicals archive ?
Isolates were screened for oxalate oxidase activity by streaking the isolates on solidified basal mineral medium having the composition (g[L.sup.-1):] K[H.sub.2]P[O.sub.4]-3, [Na.sub.2]HPO[.sub.4]-6, NaCl-5, N[H.sub.4]Cl-2, MgS[O.sub.4]7[H.sub.2]O-0.1, Agar-15 and 5-calcium oxalate.
Lastly, we tested for [O.sub.2.sup.*-] and [H.sub.2][O.sub.2] contents in plants, both of which are indicators of NADPH oxidase activity.
Catalase negative, indole positive, Oxidase negative
The preparation of a new type of glucose oxidase electrode using nanoselenium particles and the MCM-41 mesoporous composite was well demonstrated.
The coculture cells or the activated HSCs were cultured for 24, 48, and 72 h; Figure 4(a) showed that the effects of hBM-MSCs reduced the NOX activity in a time-dependent manner, suggesting that the pathways of NADPH oxidase might contribute the effect of hBM-MSCs on HSC activation.
Huttemann, "Tumor necrosis factor a inhibits oxidative phosphorylation through tyrosine phosphorylation at subunit I of cytochrome c oxidase," The Journal of Biological Chemistry, vol.
Moreover, rottlerin inhibits ROS synthesis imposed by various NADPH oxidase isoforms irrespective of directly blocking PKG5 activity (Jagnandan et al., 2007).
* The report provides a snapshot of the global therapeutic landscape for Lysine-Specific Histone Demethylase 1A (Lysine (K)-Specific Demethylase 1 or Flavin-Containing Amine Oxidase Domain-Containing Protein 2 or EC 1.)
Uric acid a breakdown product in ingested and endogenously synthesised purines, DNA and RNA are degraded into purine nucleotides and bases, which are then metabolised, via the action of xanthine oxidase, to xanthine and then uric acid [24].
Polyphenol oxidase, an enzyme found in plants, causes browning in sliced apples, black spots in cut avocados and dark marks on banana peels.