oxidase

(redirected from Oxidases)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Oxidases: Dehydrogenases, Oxygenases, Peroxidases

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

/ox·i·dase/ (ok´sĭ-dās) any enzyme of the class of oxidoreductases in which molecular oxygen is the hydrogen acceptor.

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.

oxidase

[ok′sidās]
Etymology: Gk, oxys, sharp
an enzyme that induces biological oxidation by activating the oxygen in molecules containing the element, such as hydrogen peroxide.

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:

oxidase

any of a class of enzymes that catalyze the reduction of molecular oxygen independently of hydrogen peroxide.

oxidase test
used to identify bacteria that contain cytochrome c oxidase.
References in periodicals archive ?
All these small soluble molecules were able to approach very nearly the catalytic sites of the oxidases (Figure 8).
Furthermore, active oxygen produced from gp91phox NADPH oxidase was considered to be the first rate-determining step, according to the finding that the newborn weight remained similar to the control mice when [gp91phox.
Because of the production of L-glutamate oxidase enzyme from Hypocrea jecorina has not been observed in the literature until now this study is original.
Then, to discover the possible contribution of IMP to ROS generation, and to clear the effects of IMP on membrane components of NADPH oxidase, we also measured renal cortical mRNA expressions of p22phox, p47phox, p67phox, gp91phox and proteins of p47phox, gp91phox.
Glucose oxidase (from Aspergillus niger), galactose oxidase (from Dactylium dendroides), [beta]-galactosidase (from Aspergillus oryzae), D-glucose, D-galactose, and D-lactose were obtained from SigmaAldrich.
The results were expressed in mg of phenols g-1 fresh mass; C) Polyphenol Oxidase Enzyme (PPO): determined according to the methodologies of Siriphanich and Kader (1985) and Flukey and Jen (1978).
In this step, measurement of enzyme activity was done with commercial Cholesterol oxidase purchased from Sigma.
The vascular NADPH oxidase contributes to endothelial dysfunction and high blood pressure in the spontaneously hypertensive rat by enhancing superoxide production (5).
Amine oxidase: structure and function of copper-containing amine oxidases.
They determined that the SPPs contained allergenic proteins and possessed NADH or NAD(P)H oxidase activity.
We're still trying to understand what the alternative oxidase really is," says Lee McIntosh, who studies alternative oxidation and heat-producing proteins at Michigan State University's Plant Research Laboatory in East Lansing.
He was formerly an assistant professor at Osaka University, where he worked on the chemistry of coenzyme PQQ and cofactor TTQ as well as model compounds of galactose oxidase.