| | 1 | Author
| Jan Van Brederode, Ria Kamps-Heinsbroek | Requires cookie* | | | Title
| Methylation of 3',4' Di-O H C-Glycosyl- flavones in Silene  | | | | Abstract
| In green parts of Silene plants of the genotype g lR two methylated flavonoids were found: isoscoparin and isosco-parin 2"-0-rhamnoside. An enzyme has been demonstrated to catalyze the transfer of the methyl moiety of S-adenosyl methionine to iso-orientin and iso-orientin 2"-0-rhamnosi-de. Maximal activity takes place at pH 8.0 -8 .2 . Of the me tal ions Mn2+, Mg2+, Ca2+, Co2+, Zn2+ and Hg2+, only Co2+ stimulated the reaction at conc. > 2 m M . For the methyla tion o f isoorientin the K m values were 4 x 10-6 M for S-ade-nosyl methionine and 0.32 x 10~3 m for iso-orientin. When isoorientin 2"-0-rhamnoside was used as substrate the K m values were 5 x 10"6 m for S-adenosylmethionine and 7 x 10-6 M for iso-orientin 2"-0-rhamnoside. | | | |
Reference
| Z. Naturforsch. 36c, 486 (1981); received February 20 1981 | | | |
Published
| 1981 | | | |
Keywords
| Silene, Caryophyllaceae, Methylation, Biosynthesis, Iso-scoparin | | | |
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| default:Reihe_C/36/ZNC-1981-36c-0486_n.pdf | | | | Identifier
| ZNC-1981-36c-0486_n | | | | Volume
| 36 | |
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