Phytochemistry p. 2713 - 2718 (1992)
Update date:2022-08-16
Topics:
De-Eknamkul, Wanchai
Tanahashi, Takao
Zenk, Meinhart H.
Two new enzymes involved in benzophenanthridine alkaloid biosynthesis, dihydrosanguinarine-10-hydroxylase and 10-hydroxydihydrosanguinarine-10-O-methyltransferase, have been found in cell-free extracts derived from Eschscholtzia californica cell suspension culturees.The hydroxylase is a microsome-associated, cytochrome P-450-dependent monooxygenase which acts specifically at C-10 of dihydrosanguinarine.The methyltransferase, enriched 60-fold and partially characterized, methylates only the hydroxyl moiety at C-10 to form dihydrochelirubine.Both enzymes were found to be highly substrate specific.Key Word Index: Eschscholtzia californica; Papaveraceae; benzophenanthridine alkaloids; dihydroanguinarine-10-hydroxylase; 10-hydroxydihydrosanguinarine-10-O-methyltransferase.
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