Some properties of the amine oxidase in Vicia faba seedlings

概要

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Growth of the Vicia faba seedling is accompanied by a rapid 15-day increase in amine oxidase activity of the apical parts. Cotyledons and roots were found to be devoid of activity. The partially purified enzyme from leaves readily oxidized putrescine, cadaverine, agmatine and spermidine, while dopamine (3-hydroxytyramine) and L- and D-lysine were oxidized more slowly. The Km values were 1.9×10^<-5> M for cadaverine, 3.7×10^<-5> M for putrescine, 7.8×10^<-4> M for spermidine, and 5.9×10^<-3> M for dopamine. Carbonyl reagents and copper-binding agents were effective inhibitors of Vicia faba amine oxidase. The diethyldithiocarbamate-treated enzyme could be reactivated specifically by cupric copper.
日本植物生理学会の論文