| EC |
2.4.1.159 |
| Accepted name: |
flavonol-3-O-glucoside L-rhamnosyltransferase |
| Reaction: |
UDP-β-L-rhamnose + a flavonol 3-O-β-D-glucoside = UDP + a flavonol 3-O-[α-L-rhamnosyl-(1→6)-β-D-glucoside] |
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For diagram of quercetin 3-O-Glycoside derivatives biosynthesis, click here |
| Glossary: |
UDP-β-L-rhamnose = UDP-6-deoxy-β-L-mannose |
| Other name(s): |
uridine diphosphorhamnose-flavonol 3-O-glucoside rhamnosyltransferase; UDP-rhamnose:flavonol 3-O-glucoside rhamnosyltransferase; UDP-L-rhamnose:flavonol-3-O-D-glucoside 6′′-O-L-rhamnosyltransferase |
| Systematic name: |
UDP-β-L-rhamnose:flavonol-3-O-β-D-glucoside 6′′-O-L-rhamnosyltransferase (configuration-inverting) |
| Comments: |
A configuration-inverting rhamnosyltransferase that converts flavonol 3-O-glucosides to 3-O-rutinosides. Also acts, more slowly, on rutin, quercetin 3-O-galactoside and flavonol 3-O-rhamnosides. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 83380-89-6 |
| References: |
| 1. |
Kleinehollenhorst, G., Behrens, H., Pegels, G., Srunk, N. and Wiermann, R. Formation of flavonol 3-O-diglycosides and flavonol 3-O-triglycosides by enzyme extracts from anthers of Tulipa cv apeldoorn - characterization and activity of 3 different O-glycosyltransferases during anther development. Z. Natursforsch. C: Biosci. 37 (1982) 587–599. |
| 2. |
Jones, P., Messner, B., Nakajima, J., Schaffner, A.R. and Saito, K. UGT73C6 and UGT78D1, glycosyltransferases involved in flavonol glycoside biosynthesis in Arabidopsis thaliana. J. Biol. Chem. 278 (2003) 43910–43918. [DOI] [PMID: 12900416] |
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| [EC 2.4.1.159 created 1986, modified 2015] |
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| EC |
2.4.1.236 |
| Accepted name: |
flavanone 7-O-glucoside 2′′-O-β-L-rhamnosyltransferase |
| Reaction: |
UDP-β-L-rhamnose + a flavanone 7-O-β-D-glucoside = UDP + a flavanone 7-O-[α-L-rhamnosyl-(1→2)-β-D-glucoside] |
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For diagram of apigenin derivatives biosynthesis, click here, for diagram of luteolin derivatives biosynthesis, click here and for diagram of naringenin derivatives biosynthesis, click here |
| Glossary: |
UDP-β-L-rhamnose = UDP-6-deoxy-β-L-mannose |
| Other name(s): |
UDP-rhamnose:flavanone-7-O-glucoside-2′′-O-rhamnosyltransferase; 1→2 UDP-rhamnosyltransferase; UDP-L-rhamnose:flavanone-7-O-glucoside 2′′-O-β-L-rhamnosyltransferase |
| Systematic name: |
UDP-β-L-rhamnose:flavanone-7-O-glucoside 2′′-O-α-L-rhamnosyltransferase |
| Comments: |
Acts on the 7-O-glucoside of naringenin and hesperetin, also the flavone 7-O-glucosides of luteolin and apigenin. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 125752-89-8 |
| References: |
| 1. |
Bar-Peled, M., Lewinsohn, E., Fluhr, R. and Gressel, J. UDP-rhamnose:flavanone-7-O-glucoside-2′′-O-rhamnosyltransferase. Purification and characterization of an enzyme catalyzing the production of bitter compounds in citrus. J. Biol. Chem. 266 (1991) 20953–20959. [PMID: 1939145] |
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| [EC 2.4.1.236 created 2004] |
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| EC |
2.4.1.273 |
| Accepted name: |
soyasaponin III rhamnosyltransferase |
| Reaction: |
UDP-β-L-rhamnose + soyasaponin III = UDP + soyasaponin I |
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For diagram of soyasapogenol biosynthesis, click here |
| Glossary: |
UDP-β-L-rhamnose = UDP-6-deoxy-β-L-mannose |
| Other name(s): |
UGT91H4; GmSGT3 (gene name); UDP-rhamnose:soyasaponin III rhamnosyltransferase |
| Systematic name: |
UDP-β-L-rhamnose:soyasaponin III rhamnosyltransferase |
| Comments: |
Part of the biosynthetic pathway for soyasaponins. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc |
| References: |
| 1. |
Shibuya, M., Nishimura, K., Yasuyama, N. and Ebizuka, Y. Identification and characterization of glycosyltransferases involved in the biosynthesis of soyasaponin I in Glycine max. FEBS Lett. 584 (2010) 2258–2264. [DOI] [PMID: 20350545] |
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| [EC 2.4.1.273 created 2011] |
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| EC |
2.4.1.351 |
| Accepted name: |
rhamnogalacturonan I rhamnosyltransferase |
| Reaction: |
UDP-β-L-rhamnose + α-D-galacturonosyl-[(1→2)-α-L-rhamnosyl-(1→4)-α-D-galacturonosyl]n = UDP + [(1→2)-α-L-rhamnosyl-(1→4)-α-D-galacturonosyl]n+1 |
| Other name(s): |
RRT; RG I rhamnosyltransferase |
| Systematic name: |
UDP-β-L-rhamnose:rhamnogalacturonan I 4-rhamnosyltransferase (configuration-inverting) |
| Comments: |
The enzyme, characterized from Vigna angularis (azuki beans), participates in the biosynthesis of rhamnogalacturonan type I. It does not require any metal ions, and prefers substrates with a degree of polymerization larger than 7. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc |
| References: |
| 1. |
Uehara, Y., Tamura, S., Maki, Y., Yagyu, K., Mizoguchi, T., Tamiaki, H., Imai, T., Ishii, T., Ohashi, T., Fujiyama, K. and Ishimizu, T. Biochemical characterization of rhamnosyltransferase involved in biosynthesis of pectic rhamnogalacturonan I in plant cell wall. Biochem. Biophys. Res. Commun. 486 (2017) 130–136. [DOI] [PMID: 28283389] |
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| [EC 2.4.1.351 created 2018] |
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