Reaction: UDP-α-D-xylose + an anthocyanidin 3-O-β-D-glucoside = UDP + an anthocyanidin 3-O-β-D-sambubioside
For diagram of reaction click here.
Glossary: anthocyanidin 3-O-β-D-sambubioside = anthocyanidin 3-O-(β-D-xylosyl-(1→2)-β-D-glucoside)
Other name(s): uridine 5'-diphosphate-xylose:anthocyanidin 3-O-glucose-xylosyltransferase; UGT79B1
Systematic name: UDP-α-D-xylose:anthocyanidin-3-O-β-D-glucoside 2'''-O-xylosyltransferase
Comments: Isolated from the plants Matthiola incana (stock)  and Arabidopsis thaliana (mouse-eared cress) . The enzyme has similar activity with the 3-glucosides of pelargonidin, cyanidin, delphinidin, quercetin and kaempferol as well as with cyanidin 3-O-rhamnosyl-(1→6)-glucoside and cyanidin 3-O-(6-acylglucoside). There is no activity with other UDP-sugars or with cyanidin 3,5-diglucoside.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:
1. Teusch, M. Uridine 5'-diphosphate-xylose:anthocyanidin 3-O-glucose-xylosyltransferase from petals of Matthiola incana R.Br. Planta 169 (1986) 559-563.
2. Yonekura-Sakakibara, K., Fukushima, A., Nakabayashi, R., Hanada, K., Matsuda, F., Sugawara, S., Inoue, E., Kuromori, T., Ito, T., Shinozaki, K., Wangwattana, B., Yamazaki, M. and Saito, K. Two glycosyltransferases involved in anthocyanin modification delineated by transcriptome independent component analysis in Arabidopsis thaliana. Plant J. 69 (2012) 154-167. [PMID: 21899608]