| uracil oxidase | An oxidoreductase catalyzing oxidation of uracil to barbituric acid; also oxidises thymine. Synonym: uracil oxidase. (05 Mar 2000) |
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| uracil | <biochemistry> The pyrimidine base from which uridine is derived. (18 Nov 1997) |
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| uracil-6-carboxylic acid | Intermediate in the de novo synthesis of pyrimidines. Linked glycosidically to ribose 5' phosphate, orotate forms the pyrimidine nucleotide orotidylate, that on decarboxylation at position 5 of the pyrimidine ring yields the major nucleotide uridylate (uridine 5' phosphate). (18 Nov 1997) |
| uracil dehydrogenase | An oxidoreductase catalyzing oxidation of uracil to barbituric acid; also oxidises thymine. Synonym: uracil oxidase. (05 Mar 2000) |
| uracil-DNA glycosidase | <enzyme> Catalyses hydrolysis of n-glycosidic bond of damaged nucleotide residues to give free uracil and partly depyrimidinated DNA of unaltered chain length; does not cleave phosphodiester bonds; a DNA repair enzyme Registry number: EC 3.2.2.- Synonym: ura-DNA glycosidase, uracil-DNA glycosylase, uracil n-glycosidase, ura-DNA glycosylase, uracil n-glycosylase (26 Jun 1999) |
| uracil mustard | <chemical> Nitrogen mustard derivative of uracil. It is a alkylating antineoplastic agent that is used in lymphatic malignancies, and causes mainly gastrointestinal and bone marrow damage. Pharmacological action: antineoplastic agent, alkylating. Chemical name: 2,4(1H,3H)-Pyrimidinedione, 5-(bis(2-chloroethyl)amino)- (12 Dec 1998) |
| uracil permease | <chemical> Mediates uptake of uracil in eucaryotic organisms; does not transport other natural pyrimidines such as cytosine, thymine or uridine Chemical name: permease, uracil Synonym: n 137 (26 Jun 1999) |
| uracil phosphoribosyltransferase | See: phosphoribosyltransferase. (05 Mar 2000) |
| acetaldehyde oxidase | <enzyme> Acetaldehyde is converted to acetate Registry number: EC 1.2.- (26 Jun 1999) |
| acyl-CoA oxidase | <enzyme> Catalyses stoichiometric conversion of palmitoyl-CoA and o2 into 2-hexadecenoyl-CoA and h2o2; oxidises acyl-CoA's with carbon chain lengths of 4 to 20; most active toward lauroyl-CoA, but not acetyl- or succinyl-CoA Registry number: EC 1.3.3.6 Synonym: fatty acyl CoA oxidase, fatty acyl-coenzyme a oxidase, fatty acid acyl-CoA oxidase, acox, pox1 gene product (26 Jun 1999) |
| adrenaline oxidase | amine oxidase (flavin-containing) |
| aldehyde oxidase | <enzyme> Broad substrate specificity Registry number: EC 1.2.3.1 Synonym: n1-methylnicotinamide oxidase I, n-nitrosoreductase (26 Jun 1999) |
| alternative oxidase | <enzyme> The terminal oxidase in alternative pathway respiration, as seen in plants like sauromatum guttatum (voodoo lily); amino acid sequence for tobacco alternative oxidase (aox1) in first source Registry number: EC 1.- Synonym: aox1 gene product, aox2 gene product, aox3 gene product (26 Jun 1999) |
| alternative oxidase pathway | Pathway of mitochondrial electron transport in higher plants, particularly in fruits and seeds, that does not involve cytochrome oxidase and thus is resistant to cyanide. (18 Nov 1997) |
| amine oxidase | <enzyme> A group of enzymes including those oxidizing primary monoamines, diamines, and histamine. They are copper proteins, and, as their action depends on a carbonyl group, they are sensitive to inhibition by saemicarbazide. Chemical name: Amine:oxygen oxidoreductase (deaminating)(copper-containing) Registry number: EC 1.4.3.6 (12 Dec 1998) |
| amine oxidase (copper-containing) | An oxidoreductase containing copper, and perhaps pyridoxal phosphate, and carrying out the same reaction as amine oxidase (flavin-containing). Synonym: amine oxidase (pyridoxal-containing), diamine oxidase, diamino oxyhydrase, histaminase. (05 Mar 2000) |