| EC |
2.4.1.185 |
| Accepted name: |
flavanone 7-O-β-glucosyltransferase |
| Reaction: |
UDP-glucose + a flavanone = UDP + a flavanone 7-O-β-D-glucoside |
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For diagram of the biosynthesis of naringenin derivatives, click here |
| Other name(s): |
uridine diphosphoglucose-flavanone 7-O-glucosyltransferase; naringenin 7-O-glucosyltransferase; hesperetin 7-O-glucosyl-transferase |
| Systematic name: |
UDP-glucose:flavanone 7-O-β-D-glucosyltransferase |
| Comments: |
Naringenin and hesperetin can act as acceptors. No action on flavones or flavonols. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 125752-73-0 |
| References: |
| 1. |
McIntosh, C.A., Latchinian, L. and Mansell, R.L. Flavanone-specific 7-O-glucosyltransferase activity in Citrus paradisi seedlings: purification and characterization. Arch. Biochem. Biophys. 282 (1990) 50–57. [DOI] [PMID: 2171434] |
| 2. |
McIntosh, C.A. and Mansell, R.L. Biosynthesis of naringin in Citrus paradisi - UDP-glucosyl-transferase activity in grapefruit seedlings. Phytochemistry 29 (1990) 1533–1538. |
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| [EC 2.4.1.185 created 1992] |
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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 |
3.2.1.168 |
| Accepted name: |
hesperidin 6-O-α-L-rhamnosyl-β-D-glucosidase |
| Reaction: |
hesperidin + H2O = hesperetin + rutinose |
| Glossary: |
hesperetin = 5,7,3′-trihydroxy-4′-methoxyflavanone
hesperidin = hesperetin 7-(6-O-α-L-rhamnopyranosyl-β-D-glucopyranoside)
rutinose = 6-O-α-L-rhamnopyranosyl-D-glucose |
| Other name(s): |
AnRut; rutinosidase |
| Systematic name: |
hesperetin 7-(6-O-α-L-rhamnopyranosyl-β-D-glucopyranoside) 6-O-α-rhamnopyranosyl-β-glucohydrolase |
| Comments: |
The enzyme exhibits high specificity towards 7-O-linked flavonoid β-rutinosides. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc |
| References: |
| 1. |
Mazzaferro, L., Piñuel, L., Minig, M. and Breccia, J.D. Extracellular monoenzyme deglycosylation system of 7-O-linked flavonoid β-rutinosides and its disaccharide transglycosylation activity from Stilbella fimetaria. Arch. Microbiol. 192 (2010) 383–393. [DOI] [PMID: 20358178] |
| 2. |
Mazzaferro, L., Piñuel, L., Minig, M. and Breccia, J.D. Erratum to: Extracellular monoenzyme deglycosylation system of 7-O-linked flavonoid β-rutinosides and its disaccharide transglycosylation activity from Stilbella fimetaria. Arch. Microbiol. 193 (2011) 461. |
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| [EC 3.2.1.168 created 2011] |
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