Laricitrin is an
''O''-methylated flavonol, a type of flavonoid. It is found in
red grape (absent in white grape)
and in ''
Vaccinium uliginosum
''Vaccinium uliginosum'' (bog bilberry, bog blueberry, northern bilberry or western blueberry) is a Eurasian and North American flowering plant in the genus ''Vaccinium'' within the heath family.
Distribution
''Vaccinium uliginosum'' is native ...
'' (bog billberries). It is one of the
phenolic compounds present in wine.
Metabolism
Laricitrin is formed from
myricetin
Myricetin is a member of the flavonoid class of polyphenolic compounds, with antioxidant properties. Common dietary sources include vegetables (including tomatoes), fruits (including oranges), nuts, berries, tea, and red wine. Myricetin is struc ...
by the action of the enzyme
myricetin O-methyltransferase
In enzymology, a myricetin O-methyltransferase () is an enzyme that catalyzes the chemical reaction
:2 S-adenosyl-L-methionine + myricetin \rightleftharpoons 2 S-adenosyl-L-homocysteine + syringetin
Thus, the two substrates of this enzyme are S ...
. It is further methylated by
laricitrin 5'-O-methyltransferase into
syringetin.
Glycosides
*
Laricitrin 3-O-galactoside, found in grape
[
* Laricitrin 3-glucoside found in '']Larix sibirica
''Larix sibirica'', the Siberian larch or Russian larch, is a frost-hardy tree native to western Russia, from close to the Finnish border east to the Yenisei valley in central Siberia, where it hybridises with the Dahurian larch ''L. gmelinii' ...
''
* Laricitrin 3,5’-di-O-β-glucopyranoside, found in '' Medicago littoralis''Flavonoids isolated from ''Medicago littoralis'' Rhode (Fabaceae): their ecological and chemosystematic significance
References
{{flavonol
O-methylated flavonols
Resorcinols
Catechols