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J Agric Food Chem. 2002 Apr 10;50(8):2429-31.

Enzymatic synthesis of [3'-O-methyl-(3)H]malvidin-3-glucoside from petunidin-3-glucoside.

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Department of Viticulture and Enology, University of California, Davis, California 95616-8749, USA.

Erratum in

  • J Agric Food Chem 2002 Jun 19;50(13):3886.


Malvidin-3-glucoside has been labeled by enzymatic synthesis in a single-step experiment. Catechol-O-methyl transferase catalyzed the B-ring methylation of petunidin-3-glucoside, and S-Adenosyl-L-[methyl-(3)H] methionine was the methyl donor. Solid phase extraction and preparative high-performance liquid chromatography were necessary to separate [3'-O-methyl-(3)H]malvidin-3-glucoside from an isomer and the starting material. The specific activity was 2.2 Ci mmol(-1), and the yield of incorporation was 1.1%. A possible application of the labeled material is the study of anthocyanin reactions in complex mixtures such as red wine where products are difficult to isolate and analyze.

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