Doc:UGT
From Metabolomics.JP
UDP Glycosyltransferases (UGTs)
Biological function of sugar conjugation
- Increased stability
- Anthocyanins are stabilized by the glycosylation at the 3-OH position.
- Increased water solubility.
- Compartmentalization into vacuole of phytoanticipins, glucosinolates, cyanogenic dhurrin.
- Hormonal regulation
- Cytokinin (CK) riboside is the xylem transport form.
- Inactivation of hormones such as auxin (IAA), abscisic acid (AGA), , brassinosteroid (BR), salicylic acid. (However, jasmonic acid activity is enhanced by conjugation of isoleucine.)
- Antifungal activity and membrane destabilization of oat saponins by C-3 conjugation [1]
- Germination inhibition by piceid (glucoside of resveratrol) of Venturia inaequalis into apples [2]
- Others
Family Description
Family 1 UGT contains so-called plant secondary product glycosyltransferase (PSPG) motif (44 amino acids). The highly conserved HCGWNS residues interact with the uracil moiety of UDP-glucose [5].
| Species | Family 1 UGT | |
|---|---|---|
| Arabidopsis thaliana | 120 (http://www.biobase.dk/P450) | |
| Medicago truncatula | 165 |
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