C-Glucosylflavonoid biosynthesis from 2-hydroxynaringenin by Desmodium uncinatum (Jacq.) (Fabaceae)
摘要:
[2',3',5',6'-H-2(4)]-2-Hydroxynaringenin is synthesised and incubated with commercially available UDP-glucose and the crude protein extract from Desmoduim uncinatum leaves. The organic extract produces isotopically labelled [2',3',5',6'-H-2(4)]-vitexin and [2',3',5',6'-H-2(4)]-isovitexin. Repeating the experiment with denatured protein or replacing the 2-hydroxynaringenin with [2',3',5',6'-H-2(4)]-apigenin or [2',3',5',6'-H-2(4)]- naringenin results in no observable incorporation. 2-Hydroxynaringenin is therefore the substrate for C-glucosylflavonoid biosynthesis in D. uncinatum. (C) 2009 Elsevier Ltd. All rights reserved.
The biosynthesis of allelopathic di-C-glycosylflavones from the roots of Desmodium incanum (G. Mey.) DC
作者:Bing Hao、John C. Caulfield、Mary L. Hamilton、John A. Pickett、Charles A. O. Midega、Zeyaur R. Khan、Junru R. Wang、Antony M. Hooper
DOI:10.1039/c5ob01926e
日期:——
Biosynthesis of allelopathic di-C-glycosylflavones in the plant D. incanum, occurs by UDP-glucosylation of a natural or analogue 2-hydroxyflavonoid substrate, followed by a second glycosylation with UDP-Glu, UDP-Ara, or UDP-Gal.