MetaCyc Enzyme: flavanone 7-O-glucoside 2''-O-β-L-rhamnosyltransferase

Species: Citrus maxima

The rhamnosyltransferase from young pummelo leaves catalyzed the transfer of rhamnose from UDP-rhamnose to the C-2 hydroxyl group of glucose of Flavonoid-7-O-glucosides. The enzyme could not use 5-O-glucosides or aglycones as substrates.

Molecular Weight of Polypeptide: 52.0 kD (experimental) [BarPeled91 ]

Gene-Reaction Schematic: ?

Gene-Reaction Schematic

Created 14-Aug-2008 by Karthikeyan AS , TAIR

Enzymatic reaction of: flavanone 7-O-glucoside 2''-O-β-L-rhamnosyltransferase

Synonyms: UDP-rhamnose:flavanone-7-O-glucoside-2''-O-rhamnosyltransferase

apigenin 7-O-β-D-glucoside + UDP-β-L-rhamnose <=> apigenin 7-O-neohesperidoside + UDP + H+

The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.

The reaction is favored in the direction shown.

In Pathways: apigenin glycosides biosynthesis

Kinetic Parameters:

Km (μM)


BarPeled91: Bar-Peled M, Lewinsohn E, Fluhr R, Gressel J (1991). "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(31);20953-9. PMID: 1939145

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Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
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