oxidase


oxidase
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. O. 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.
- direct o. originally, an o. catalyzing the transfer of O2 directly to other bodies; now termed oxygenase.
- indirect o. originally, an o. that acts by reducing a peroxide; now termed peroxidase.
- terminal o. the last protein in the electron transport, respiratory chain. In mammals this is cytochrome c o..

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ox·i·dase 'äk-sə-.dās, -.dāz n any of various enzymes that catalyze oxidations esp one able to react directly with molecular oxygen

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n.

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ox·i·dase (okґsĭ-dās) a term used in the recommended names of some oxidoreductases to denote those in which molecular oxygen is the hydrogen acceptor.

Medical dictionary. 2011.

Look at other dictionaries:

  • oxídase — |cs| s. f. Diástase que ativa o oxigênio e o fixa ao hidrogênio ou a outros corpos.   ‣ Etimologia: óxido + ase …   Dicionário da Língua Portuguesa

  • oxidase — [äk′si dās΄, äk′sidāz΄] n. [ OXID(IZE) + ASE] any oxidoreductase enzyme that acts as a catalyst in oxidation reactions in which oxygen is the electron acceptor …   English World dictionary

  • Oxidase — An oxidase is any enzyme that catalyzes an oxidation reduction reaction involving molecular oxygen (O2) as the electron acceptor. In these reactions, oxygen is reduced to water (H2O) or hydrogen peroxide (H2O2). The oxidases are a subclass of the …   Wikipedia

  • Oxidase — Oxidoreduktasen sind Enzyme der ersten Enzymklasse laut der systematischen Nomenklatur der Enzymkommission der International Union of Biochemistry (IUB) und katalysieren Redoxreaktionen. Der systematische Name ist Donor:Acceptor Oxidoreduktases.… …   Deutsch Wikipedia

  • oxidase — noun Etymology: International Scientific Vocabulary Date: 1896 any of various enzymes that catalyze oxidations; especially one able to react directly with molecular oxygen • oxidasic adjective …   New Collegiate Dictionary

  • oxidase — oxidasic /ok si day sik, zik/, adj. /ok si days , dayz /, n. Biochem. any of a class of oxidoreductases that catalyze the oxidation of a substrate by molecular oxygen with the formation, in most cases, of hydrogen peroxide. [1895 1900; OXIDE +… …   Universalium

  • oxidase — noun Any of many enzymes which catalyze oxidation reactions, especially ones using molecular oxygen …   Wiktionary

  • Oxidase — Oxi|da|se 〈f. 19; Biochem.〉 oxidierend wirkendes Enzym; oV Oxydase * * * O|xi|da|se [↑ Oxidation u. ↑ ase], die; , n: zur Gruppe der ↑ Oxidoreduktasen gehörende Enzyme, die org. Substrate mit Hilfe von mol. Sauerstoff haupts. unter Bildung von… …   Universal-Lexikon

  • Oxidase — O|xi|da|se 〈f.; Gen.: , Pl.: n; Biochemie〉 oxidierend wirkendes Enzym …   Lexikalische Deutsches Wörterbuch

  • Oxidase — Oxi|da|se, auch Oxydase die; , n <zu ↑...ase> Sauerstoff übertragendes Enzym (Biochem., Chem.) …   Das große Fremdwörterbuch


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