Laricitrin
Encyclopedia
Laricitrin is a O-methylated flavonol, a type of flavonoid. It is found in red grape (absent in white grape) and in Vaccinium uliginosum
(bog billberries). It is one of the phenolic compounds present in wine
.
by the action of the enzyme myricetin O-methyltransferase
. It is further methylated by laricitrin 5'-O-methyltransferase into syringetin
.
Vaccinium uliginosum
Vaccinium uliginosum is a flowering plant in the genus Vaccinium.-Distribution:Vaccinium uliginosum is native to cool temperate regions of the Northern Hemisphere, at low altitudes in the Arctic, and at high altitudes south to the Pyrenees, the Alps, and the Caucasus in Europe, the mountains of...
(bog billberries). It is one of the phenolic compounds present in wine
Phenolic compounds in wine
The phenolic compounds - natural phenol and polyphenols - in wine include a large group of several hundred chemical compounds that affect the taste, color and mouthfeel of wine. These compounds include phenolic acids, stilbenes, flavonols, dihydroflavonols, anthocyanins, flavanol monomers and...
.
Metabolism
Laricitrin is formed from myricetinMyricetin
Myricetin is a naturally occurring flavonol, a flavonoid found in many grapes, berries, fruits, vegetables, herbs, as well as other plants. Walnuts are a rich dietary source. Trace amounts can be found as glycosides. It is one of the phenolic compounds present in red wine.Myricetin has antioxidant...
by the action of the enzyme myricetin O-methyltransferase
Myricetin O-methyltransferase
In enzymology, a myricetin O-methyltransferase is an enzyme that catalyzes the chemical reactionThus, the two substrates of this enzyme are S-adenosyl methionine and myricetin, whereas its two products are S-adenosylhomocysteine and syringetin....
. It is further methylated by laricitrin 5'-O-methyltransferase into syringetin
Syringetin
Syringetin is a O-methylated flavonol, a type of flavonoid. It is found in red grape , in Lysimachia congestiflora and in Vaccinium uliginosum...
.
Glycosides
- Laricitrin 3-O-galactoside, found in grape
- Laricitrin 3-glucoside found in Larix sibirica
- Laricitrin 3,5’-di-O-β-glucopyranoside, found in Medicago littoralisMedicago littoralisMedicago littoralis is a plant species of the genus Medicago. It is found primarily in the Mediterranean basin. It forms a symbiotic relationship with the bacterium Sinorhizobium meliloti, which is capable of nitrogen fixation. Common names include coastal medick and strand medick.- External links :*...