Vinylcatechin Dimers Are Much Better Copigments for Anthocyanins than Catechin Dimer Procyanidin B3

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Luis Cruz (Author) Other; Natercia F Bras (Author) Other; Natercia Teixeira (Author) Other; Nuno Mateus (Author) FCUP; Maria Joao Ramos (Author) FCUP; Olivier Dangles (Author) Other; Victor De Freitas (Author) FCUP

Journal

Title: Journal of Agricultural and Food Chemistry

Vol. 58

Pages: 3159-3166

ISSN: 0021-8561

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 20 Citations

Scopus - 26 Citations

Scientific classification

FOS: Agrarian Sciences > Other Agrarian Sciences

Other information

Authenticus ID: P-003-8B1

DOI: 10.1021/jf9037419

Abstract (EN): The binding constants (K) for the interaction of three copigments (CP), two epimeric vinylcatechin dimers (CP1 and CP2), and catechin dimer B3 (CP3) with two pigments, malvidin-3-glucoside (oenin) and malvidin-3,5-diglucoside (malvin), were determined. The K values clearly show that both vinylcatechin dimers have much higher affinity for oenin and malvin than dimer B3: K(CP2) > K(CP1) >> K(CP3). Quantum mechanics and molecular dynamics calculations were also performed to interpret the binding data and specify the relative arrangement of the pigment and copigment molecules within the complexes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8