Partial purification and characterization of dihydrobenzophenanthridine oxidase from Eschscholtzia californica cell suspension cultures
作者:H. M. Schumacher、M. H. Zenk
DOI:10.1007/bf00272975
日期:1988.1
The observation that upon elicitationcell suspension cultures of Eschscholtzia california showed a decrease of dihydromacarpine with a concomittant increase of macarpine led to the discovery of a novel enzyme which catalyzes the oxidation of dihydrobenzophenanthridines in the presence of oxygen. The enzyme was enriched approx. 70-fold. It has a pH-optimum of 7.0, an isoelectric point at pH 8.8, molecular
对 Eschscholtzia california 的细胞悬浮培养物的诱导显示出二氢马卡品减少而马卡品增加的观察结果导致发现了一种新的酶,该酶在氧气存在下催化二氢苯并菲啶的氧化。酶被富集约。70 倍。它的最佳 pH 值为 7.0,等电点为 pH 8.8,分子量为 56 kD,并显示出高度的底物特异性。该酶显然催化了 A 环和 D 环中含有亚甲基二氧取代基的苯并菲啶生物碱形成的最后一步。
Purification and characterization of dihydrobenzophenanthridine oxidase from elicited Sanguinaria canadensis cell cultures
作者:Hirohumi Arakawa、W.Gregg Clark、Mikulas Psenak、Carmine J. Coscia
DOI:10.1016/0003-9861(92)90236-p
日期:1992.11
treatment of Papaveracea cells with fungal elicitors, the biosynthesis of benzo[c]phenanthridine alkaloids is induced. Dihydrobenzophenanthridineoxidase, which catalyzes a later step in the biogenesis of these alkaloids, is one of the enzymes whose activity is elevated in the process. Here we report the 211-fold purification of the oxidasefromelicitedSanguinariacanadensis by a combination of ammonium