Pathways involved in the biosynthesis and catabolism of caffeine in Coffea and Camellia

被引：0

作者：

Crozier, A ^{[1
]}

Baumann, TW ^{[1
]}

Ashihara, H ^{[1
]}

Suzuki, T ^{[1
]}

Waller, GR ^{[1
]}

机构：

[1] Univ Glasgow, Inst Biomed & Life Sci, Div Biochem & Mol Biol, Glasgow G12 8QQ, Lanark, Scotland

来源：

SEVENTEENTH INTERNATIONAL SCIENTIFIC COLLOQUIUM ON COFFEE, NAIROBI, JULY 20-25, 1997 | 1997年

关键词：

D O I：

暂无

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Recent investigations on caffeine biosynthesis pathways in leaves of Coffea arabica and Camellia sinensis, using both in vitro and in vivo test systems, are reviewed with special interest being focused on the proposal that the N-7 methyl acceptor is xanthosine monophosphate rather than xanthosine. In addition, studies on the isolation on the N-methyltransferases involved in caffeine biosynthesis which have succeeded in separating N-7 methyltransferase activity from the N-1- and N-3 methyltransferase activities are discussed. Purine alkaloid catabolism pathways are also discussed in the light of recent evidence demonstrating salvage of 3-methylxanthine and xanthine for the resynthesis of not only theophylline but also caffeine via theobromine. These pathways operate in leaves of tea but not those of coffee.

引用

页码：106 / 113

页数：2