Partial purification and properties of S-adenosyl-l-methionine: (S)-tetrahydroprotoberberinecis-N-methyltransferase from suspension-cultured cells of Eschscholtzia and Corydalis
作者:Martina Rueffer、Gitta Zumstein、Meinhart H. Zenk
DOI:10.1016/0031-9422(90)85321-6
日期:——
been found in different species of isoquinoline alkaloid-producing plant cell cultures which specifically N -methylates certain ( S )-tetrahydroprotoberberine alkaloids such as ( S )-canadine and ( S )-stylopine at the expense of S -adenosyl- l -methionine (SAM). It was partially purified (90-fold from Eschscholtzia californica cell suspension cultures and characterized. The enzyme has a pH optimum of
摘要 在不同种类的产生异喹啉生物碱的植物细胞培养物中发现了一种酶,该酶特异性地 N-甲基化某些 (S)-四氢原小檗碱生物碱,例如 (S)-canadine 和 (S)-stylopine,以牺牲 S-腺苷- l-甲硫氨酸(SAM)。它被部分纯化(来自 Eschscholtzia californica 细胞悬浮培养物的 90 倍并进行了表征。该酶的最适 pH 值为 8.9,最适温度为 40°,M r 约为 78 000 ± 10%。 )-canadine 被确定为 6.4,μM, (S)-stylopine 3.1 μM 和 SAM 12,μM。该酶被 S-腺苷-l-高半胱氨酸(SAH,K i 为 24 μM)抑制。