Petunidin

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Petunidin
Petunidin.svg
Identifiers
CAS number 1429-30-7 N
PubChem 441774
ChemSpider 390371 YesY
ChEBI CHEBI:75318 N
Jmol-3D images Image 1
Properties
Molecular formula C16H13O7+ (Cl-)
Molar mass 317.27 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Petunidin (Pt) is an O-methylated anthocyanidin. It is a natural organic compound and a particular type of anthocyanidin. It is a dark-red or purple water-soluble pigment found in many redberries including chokeberries (Aronia sp), Saskatoon berries (Amelanchier alnifolia) or different species of grape (for instance Vitis vinifera, or muscadine, Vitis rotundifolia), and also part of the pigments responsible for the petal colors in many flowers. This pigment gives the Indigo Rose tomatoes the majority of their deep purple color when the fruits are exposed to sunlight.[1] The name of the molecule itself is derived from the word Petunia.

Biosynthesis[edit]

Petunidin could form in the exocarp of fruits from delphinidin, with an anthocyanin flavonoid O-methyltransferase (Catechol-O-methyl transferase) catalyzing the B-ring methylation and S-Adenosyl-L-methyl-3H methionine being the methyl group donor.

Glycosides[edit]

Glycoside forms of petunidin are present in grape.[2] These include :

The bark of Commiphora angolensis contains petunidin-3-rhamnoglucoside.[3]

Uses[edit]

Petunidin is referred as E165f, E163 and following numbers corresponding to anthocyanins in the food coloring E number list.

See also[edit]

References[edit]

  1. ^ http://horticulture.oregonstate.edu/purple_tomato_faq
  2. ^ http://www.food-info.net/uk/colour/anthocyanin.htm
  3. ^ Chemical study of bark from Commiphora angolensis Engl. Cardoso Do Vale, J., Bol Escola Farm Univ Coimbra Edicao Cient, 1962, volume 3, page 128 (abstract)