Amaranthin in feather cockscombs is synthesized via glucuronylation at the cyclo-DOPA glucoside step in the betacyanin biosynthetic pathway.
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.
Sasaki
Nobuhiro
N
Department of Biotechnology, Faculty of Technology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.
Abe
Yutaka
Y
Wada
Katsuhiro
K
Koda
Takatoshi
T
Goda
Yukihiro
Y
Adachi
Taiji
T
Ozeki
Yoshihiro
Y
D050859:Betacyanins / Q000378:metabolism*; D034762:Celosia / Q000201:enzymology / Q000378:metabolism*; D004295:Dihydroxyphenylalanine / Q000378:metabolism*; D005960:Glucosides / Q000378:metabolism; D020723:Glucuronic Acid / Q000378:metabolism*; D014453:Glucuronosyltransferase / Q000302:isolation & purification / Q000378:metabolism*
D050859:Betacyanins; D005960:Glucosides; C494225:cyclo-dopa; C494261:amaranthin betacyanin; D004295:Dihydroxyphenylalanine; D020723:Glucuronic Acid; D014453:Glucuronosyltransferase