| dihydrouracil oxidase | <enzyme> Oxygen dependent; no cofactor required, forms uracil irreversibly; enzyme from rhodosporidium toruloides Registry number: EC 1.3.3.- (26 Jun 1999) |
|---|---|
| diphenol oxidase | <enzyme> An enzyme of the oxidoreductase class that catalyses the reaction between catechol and oxygen to yield benzoquinone and water. It is a complex of copper-containing proteins that acts also on a variety of substituted catechols. Chemical name: 1,2-Benzenediol:oxygen oxidoreductase Registry number: EC 1.10.3.1 (12 Dec 1998) |
| dopa oxidase | Provisional name given the enzyme(s) catalyzing the formation of melanins from dopa; it now appears that the copper-containing monophenol monooxygenases and/or catechol oxidases are responsible for the oxidation of l-tyrosine to dopa and dopa quinone. (05 Mar 2000) |
| duroquinol oxidase | <enzyme> Consists of fixn, fixo, and fixp proteins in bradyrhizobium, in which fixo and fixp are c-type cytochromes; does not contain cytochromes, probably a flavoprotein; a proto-haem containing oxidase expressed by the cyoabc locus in paracoccus denitrificans Registry number: EC 1.- Synonym: aroid alternative oxidase, quinol oxidase, trypanosoma alternative oxidase, cyanide-resistant alternative oxidase, cytochrome bb3, cytochrome bb(3) (26 Jun 1999) |
| indole-3-ethanol oxidase | <enzyme> Involved in conversion of indole-3-ethanol to indole-3-acetic acid; isolated from seeds of the bean phaseolus vulgaris; not stimulated by nadp or fad; do not confuse with nad- or nadp-dependent indole-3-ethanol oxidases Registry number: EC 1.1.- Synonym: tryptophol oxidase (26 Jun 1999) |
| indoleacetic acid oxidase | <enzyme> Found in tomatoes Registry number: EC 1.11.- Synonym: iaa oxidase (26 Jun 1999) |
| indophenol oxidase | <enzyme> Also oxidises tetrazolium salts in the presence of phenazine methosulfate; this is not EC 1.9.3.1 Registry number: EC 1.- (26 Jun 1999) |
| octopine oxidase | <enzyme> Catalyses oxidative cleavage of octopine into l-arginine and pyruvate; no required cofactors; activity requires ooxa and ooxb gene products; isolated from agrobacterium tumefaciens Registry number: EC 1.5.99.- (26 Jun 1999) |
| 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. 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. Direct oxidase, originally, an oxidase catalyzing the transfer of O2 directly to other bodies; now termed oxygenase. Indirect oxidase, originally, an oxidase that acts by reducing a peroxide; now termed peroxidase. Terminal oxidase, the last protein in the electron transport, respiratory chain. In mammals this is cytochrome c oxidase. (05 Mar 2000) |
| oxidase test | A colon test for the presence of intracellular cytochrome oxidase based on the reaction with p-phenylenediamine; aids in the identification of Neisseria species and Pseudomonadaceae. (05 Mar 2000) |
| oxyhemoglobin oxidase | <enzyme> Oxyhemoglobin (ferrous) is oxidised by methemoglobin (ferric) Registry number: EC 1.16.- Synonym: haemoglobin oxidase (26 Jun 1999) |
| tetrahydroprotoberberine oxidase | <enzyme> From berberis wilsoniae; catalyses in the presence of oxygen the removal of four hydrogen atoms from the c ring of tetrahydroprotoberberines with production of 4 mol of h2o2 and h2o Registry number: EC 1.3.3.- Synonym: thpb oxidase, tetrahydroberberine oxidase (26 Jun 1999) |
| theophylline oxidase | <enzyme> Catalyses the oxidation of theophylline to 1,3-dimethyluric acid in the presence of ferricytochrome c Registry number: EC 1.5.99.- (26 Jun 1999) |
| thiamin oxidase | <enzyme> Converts thiamine to thiamine acetic acid Registry number: EC 1.1.3.23 Synonym: thiamine dehydrogenase, thiamin dehydrogenase (26 Jun 1999) |
| enacyloxin oxidase | <enzyme> A quinoprotein oxidase which converts the antibiotic enacyloxin iva to enacyloxin IIa by oxidation of the 15' oh to =o Registry number: EC 1.1.99.- Synonym: enx oxidase (26 Jun 1999) |