| uridine diphosphoglucuronic acid | Uridine diphosphoglucose in which the 6 CH2OH of the glucose has been oxidised to COOH (has become a glucuronyl residue); participates in the formation of conjugates of bilirubin or drugs such as aspirin. Acronym: UDPGA (05 Mar 2000) |
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| uridine diphosphoxylose | <biochemistry> Monosaccharide pentose that is found in xylans, very abundant components of hemicelluloses. (18 Nov 1997) |
| uridine kinase | <enzyme> An enzyme that catalyses the phosphorylation of uridine and cytidine to uridine 5'-phosphate and cytidine 5'-phosphate, respectively. ATP, dutp, dGTP, and datp are effective phosphate donors. Chemical name: ATP:uridine 5'-phosphotransferase Registry number: EC 2.7.1.48 (12 Dec 1998) |
| uridine monophosphate | <chemical> 5'-uridylic acid. A uracil nucleotide containing one phosphate group esterified to the sugar moiety in the 2', 3' or 5' position. Chemical name: 5'-Uridylic acid (12 Dec 1998) |
| uridine monophosphate kinase | <enzyme> Catalyses the phosphorylation of ump to udp; an aspect of EC 2.7.4.4 Registry number: EC 2.7.4.- Synonym: ump kinase, uridine-5-monophosphate kinase, uridylate kinase (26 Jun 1999) |
| uridine nucleosidase | <chemical> Chemical name: nucleosidase, uridine Synonym: uridine ribohydrolase (26 Jun 1999) |
| uridine phosphorylase | <enzyme> An enzyme that catalyses the transfer of ribose from uridine to orthophosphate, forming uracil and ribose 1-phosphate. Chemical name: Uridine:orthophosphate alpha-D-ribosyltransferase Registry number: EC 2.4.2.3 (12 Dec 1998) |
| uridine-specific acid nuclease | <enzyme> Chicken liver enzyme hydrolyzes poly(u) and e. Coli RNA Registry number: EC 3.1.- (26 Jun 1999) |
| uridine triphosphatase | <enzyme> Rn in chemline for deoxyuridine triphosphatase: EC 3.6.1.23 Registry number: EC 3.6.1.- Synonym: utpase (26 Jun 1999) |
| uridine triphosphate | A molecule which consists of the nitrogenous base uracil linked to the sugar ribose and which has a chain of three phosphate groups attached to the ribose in a linear fashion. UTP is required during transcription since it is a direct precursor of RNA. (09 Oct 1997) |
| acetoacetyl-coenzyme A | Intermediate in the oxidation of fatty acids and in the formation of ketone bodies; also formed from two molecules of acetyl-CoA; major role is condensation with acetyl-CoA to form the important beta-hydroxy-beta-methylglutaryl-CoA. Synonym: acetoacetyl-coenzyme A. (05 Mar 2000) |
| acetyl-coenzyme A | <enzyme> Condensation product of coenzyme A and acetic acid, symbolised as CoAS~COCH3; intermediate in transfer of two-carbon fragment, notably in its entrance into the tricarboxylic acid cycle and in fatty acid synthesis. This coenzyme plays a huge role in intermediary metabolism, in which cells synthesise, break down or use nutrient molecules for energy production, growth, etc. Acetyl-coenzyme A synthase is found in bacteria and plants and catalyses the reaction in which acetate enters metabolic pathways and forms acetyl-coenzyme A. Synonym: acetyl-coenzyme A, active acetate. (05 Mar 2000) |
| acetyl-coenzyme A-deacetylvindoline 4-O-acetyltransferase | <enzyme> Catalyses the final step in vindoline biosynthesis in catharanthus roseus Registry number: EC 2.3.1.107 Synonym: acadv-acetyltransferase, acetylcoenzyme a-deacetylvindoline-17-o-acetyltransferase (26 Jun 1999) |
| acetyl-coenzyme A-salutaridinol-7-O-acetyltransferase | <enzyme> Catalyses the transfer of acetyl from acetyl coenzyme a to the 7-oh group of salutaridinol which yields salutaridinol-7-o-acetate, an intermediate in morphine biosynthesis; from papaver somniferum plant cell cultures Registry number: EC 2.3.1.- Synonym: acetyl CoA-salutaridinol-7-o-acetyltransferase, salutaridinol-7-o-acetyltransferase (26 Jun 1999) |
| acyl-coenzyme A | RCH2COSCoA or RCH2CO~SCoA;condensation product of a carboxylic acid and coenzyme A, and metabolic intermediate of importance, notably in the oxidation and synthesis of fat. Synonym: acyl-coenzyme A. (05 Mar 2000) |