MetaCyc Enzyme: UDP-glucuronic acid: cyclo-DOPA 5-glucoside glucuronosyltransferase
Inferred from experiment

Species: Celosia cristata

The enzyme activity of UDP-glucuronic acid: cyclo-DOPA 5-glucoside glucuronosyltransferase has been detected in crude extracts from purple petals of feather cockscombs ( Celosia cristata). The enzyme added glucuronic acid to 5-O-glucosylated cyclo-Dopa forming the corresponding glucuronosyl derivative. It has been demonstrated that the glucuronosyltransferase did not accept betanidin glucoside indicating that the glucuronic acid moity of amaranthin is introduced at the cyclo-Dopa glucoside step, i.e. before the condensation with betalamic acid takes place [Sasaki05].

Gene-Reaction Schematic

Gene-Reaction Schematic

Created 03-Jan-2007 by Foerster H, TAIR

Enzymatic reaction of: UDP-glucuronic acid: cyclo-DOPA 5-glucoside glucuronosyltransferase

Inferred from experiment

EC Number: 2.4.1.-

cyclo-dopa 5-O-glucoside + UDP-α-D-glucuronate → cyclo-dopa glucuronylglucoside + UDP + H+

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the direction in which it was curated.

The reaction is favored in the direction shown.

In Pathways: superpathway of betalain biosynthesis, amaranthin biosynthesis

Citations: [Sasaki05]


Sasaki05: Sasaki N, Abe Y, Wada K, Koda T, Goda Y, Adachi T, Ozeki Y (2005). "Amaranthin in feather cockscombs is synthesized via glucuronylation at the cyclo-DOPA glucoside step in the betacyanin biosynthetic pathway." J Plant Res 118(6);439-42. PMID: 16247652

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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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