Amaranthin in feather cockscombs is synthesized via glucuronylation at the cyclo-DOPA glucoside step in the betacyanin biosynthetic pathway.

Nobuhiro Sasaki, Yutaka Abe, Katsuhiro Wada, Takatoshi Koda, Yukihiro Goda, Taiji Adachi, Yoshihiro Ozeki

Department of Biotechnology, Faculty of Technology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.

Journal of plant research 2005 Dec

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Uridine 5'-diphosphate (UDP)-glucuronic acid: cyclo-DOPA 5-glucoside glucuronosyltransferase activity was detected in a crude extract prepared from the purple flowers of feather cockscombs. This suggests that the glucuronic acid moiety of amaranthin and its derivatives may be introduced at the cyclo-DOPA glucoside step, but not at the betanidin glucoside step.

Citation

Nobuhiro Sasaki, Yutaka Abe, Katsuhiro Wada, Takatoshi Koda, Yukihiro Goda, Taiji Adachi, Yoshihiro Ozeki. Amaranthin in feather cockscombs is synthesized via glucuronylation at the cyclo-DOPA glucoside step in the betacyanin biosynthetic pathway. Journal of plant research. 2005 Dec;118(6):439-42