| uridine 5'-monophosphate synthase | <chemical> Consists of orotate phosphoribosyltransferase EC 2.4.2.10 and orotidylate decarboxylase EC 4.1.1.23 Chemical name: synthase, uridylate Synonym: ump synthase, uridine 5'-phosphate synthase, uridylate synthase (26 Jun 1999) |
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| uridine 5'-triphosphate | <biochemistry> Uridine esterified with triphosphoric acid at its 5'-position; the immediate precursor of uridylic acid residues in RNA. (05 Mar 2000) |
| uridine diphosphate | <chemical> Uridine 5'-(trihydrogen diphosphate). A uracil nucleotide containing two phosphate groups esterified to the sugar moiety. Synonym: uridine pyrophosphate; urpp. Chemical name: Uridine 5'-(trihydrogen diphosphate) (12 Dec 1998) |
| uridine diphosphate galactose | <chemical> A nucleoside diphosphate sugar which can be epimerised into udpglucose for entry into the mainstream of carbohydrate metabolism. Serves as a source of galactose in the synthesis of lipopolysaccharides, cerebrosides, and lactose. Chemical name: Uridine 5'-(trihydrogen diphosphate), P'-alpha-D-galactopyranosyl ester (12 Dec 1998) |
| uridine diphosphate glucose | <chemical> A key intermediate in carbohydrate metabolism. Serves as a precursor of glycogen, can be metabolised into udpgalactose and udpglucuronic acid which can then be incorporated into polysaccharides as galactose and glucuronic acid. Also serves as a precursor of sucrose lipopolysaccharides, and glycosphingolipids. Chemical name: Uridine 5'-(trihydrogen diphosphate), P'-alpha-D-glucopyranosyl ester (12 Dec 1998) |
| uridine diphosphate glucose dehydrogenase | <enzyme> An enzyme that catalyses the oxidation of udpglucose to udpglucuronate in the presence of NAD+. Chemical name: UDPglucose:NAD+ 6-oxidoreductase Registry number: EC 1.1.1.22 (12 Dec 1998) |
| uridine diphosphate glucuronic acid | <chemical> A nucleoside diphosphate sugar which serves as a source of glucuronic acid for polysaccharide biosynthesis. It may also be epimerised to udp iduronic acid, which donates iduronic acid to polysaccharides. In animals, udp glucuronic acid is used for formation of many glucosiduronides with various aglycones. Chemical name: alpha-D-Glucopyranuronic acid, 1-P'-ester with uridine 5'-(trihydrogen diphosphate) (12 Dec 1998) |
| uridine diphosphate kinase | <enzyme> Aspect of EC 2.7.4.6 Registry number: EC 2.7.4.- Synonym: udp kinase (26 Jun 1999) |
| uridine diphosphate n-acetylgalactosamine | <chemical> A nucleoside diphosphate sugar which serves as a source of n-acetylgalactosamine for glycoproteins, sulfatides and cerebrosides. Chemical name: Uridine 5'-(trihydrogen diphosphate), P'-(2-(acetylamino)-2-deoxy-alpha-D-galactopyranosyl) ester (12 Dec 1998) |
| uridine diphosphate n-acetylglucosamine | <chemical> Serves as the biological precursor of insect chitin, of muramic acid in bacterial cell walls, and of sialic acids in mammalian glycoproteins. Chemical name: Uridine 5'-(trihydrogen diphosphate), P'-(2-(acetylamino)-2-deoxy-alpha-D-glucopyranosyl) ester (12 Dec 1998) |
| uridine diphosphate n-acetylmuramic acid | A nucleoside diphosphate sugar which is formed from udp-n-acetylglucosamine and phosphoenolpyruvate. It serves as the building block upon which peptidoglycan is formed. (12 Dec 1998) |
| uridine diphosphate xylose | <chemical> The decarboxylation product of udpglucuronic acid, which is used for formation of the xylosides of seryl hydroxyl groups in mucoprotein synthesis. Also forms plant xylans. Chemical name: Uridine 5'-(trihydrogen diphosphate), P'-alpha-D-xylopyranosyl ester (12 Dec 1998) |
| uridine diphosphogalactose | A pyrophosphate group links the 5'-position of uridine and the 1 position of d-galactose. (05 Mar 2000) |
| uridine diphosphoglucose | A pyrophosphate group links the 5'-position of uridine and the 1-position of d-glucose; an intermediate in glycogen biosynthesis. Synonym: UDPglucose. Acronym: UDPG (05 Mar 2000) |
| uridine diphosphoglucose 4-epimerase | <enzyme> A necessary enzyme in the metabolism of galactose. It reversibly catalyses the conversion of udpglucose to udpgalactose. NAD+ is an essential component for enzymatic activity. Chemical name: UDPglucose 4-epimerase Registry number: EC 5.1.3.2 (12 Dec 1998) |