UDP-glucosyl-transferase

There is now convincing evidence that glycogen is synthesized by the concurrent action of two transglucosylases these are glycogen-UDP-glucosyl transferase " and a branching enzyme. Phosphorylase, which... 

Treatment of racemic mandelonitrile with UDP-glucosyl transferase from the fruits and leaves of black cherry, Prums serotina, produces only (/ )-prunasin (19). These preparations did not convert prunasin to the diglycoside amygdalin (20) (Dewick, 1984). 

Whether it is transported unmodified into the endosperm, or resynthesized there from its component monosaccharides, sucrose is the starting point for starch formation. It is converted to fructose and uridine diphosphoglucose (UDPG) by sucrose synthetase (sucrose-UDP glucosyl transferase) ... 

Figure 6.1 Major branch pathways of flavonoid biosynthesis in Arabidopsis. Branch pathways, enzymes, and end products present in other plants but not Arabidopsis are shown in light gray. Abbreviations cinnamate-4-hydroxylase (C4H), chalcone isomerase (CHI), chalcone synthase (CHS), 4-coumarate CoA-ligase (4CL), dihydroflavonol 4-reductase (DFR), flavanone 3-hydroxylase (F3H), flavonoid 3 or 3 5 hydroxylase (F3 H, F3 5 H), leucoanthocyanidin dioxygenase (LDOX), leucoanthocyanidin reductase (LCR), O-methyltransferase (OMT), phenylalanine ammonia-lyase (PAL), rhamnosyl transferase (RT), and UDP flavonoid glucosyl transferase (UFGT).

Also referred to as UDP-glucose-/3-D-glucan glucosyl-transferase and UDP-glucose-cellulose glucosyltransfer-... 

The properties of bilirubin UDP-glucosyl- and bilirubin UDP-xylosyl-transferase from rat liver closely parallel each other with regard to activation by digitonin and dependence on pH and bivalent metal ions. Considerable fractions of the enzyme activities (especially of the glucosyl-transferase) functioned independently of added bivalent cation (F3). The observations are compatible with identical enzyme locations, at least for the metal ion-stimulated activities. 

Fig. 1. Simplified diagram of the phenylpropanoid and flavonoid biosynthetic pathways. Enzymes that catalyze the reactions are placed on the left-hand side, and transcription factors on the right-hand side of the arrows. Both transcription factors for which their control over the enzymatic steps has been genetically proven, as well as transcription factors that have been shown to interact with promoters of the structural genes, are shown. PAL Phenylalanine ammonia lyase C4H cinnamate 4-hydroxylase 4CL 4-coumaroyl-coenzyme A ligase CHS chalcone synthase CHI chalcone-flavanone isomerase F3H flavanone 3(3-hydroxylase DFR dihydroflavonol 4-reductase AS anthocyanin synthase UFGT UDP glucose-flavonol glucosyl transferase RT anthocyanin rhamnosyl transferase...

Wurtele, E.S., Thayer, S.S. and Corm, E.E. (1982) Subcellular localization of a UDP-glucose aldehyde cyanohydrin (i-glucosyl transferase in epidermal plastids of Sorghum leaf blades. Plant Physiol, 10,1732-7. 

Gross, G.G. (1983) Partial purification and properties of UDP-glucose vanillate 1-0-glucosyl transferase from oak leaves. Phytochemistry, 22,2179-82. 

Wang, S.X. and Ellis, B.E. (1998) Enzymology of UDP-glucose sinapic acid glucosyl-transferase from Brassica napus. Phytochemistry, 49, 307-18. 

Kreis, W., May, U. and Reinhard, E. (1986) UDP glucose digitoxin 16 -0-glucosyl-transferase from suspension-cultured Digitalis lanata cells. Plant Cell Rep., 5, 442-5. 

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