Document Detail

Effect of glucuronosylation on anthocyanin color stability.
MedLine Citation:
PMID:  19281238     Owner:  NLM     Status:  MEDLINE    
The effect of glucuronosylation on the color stability of anthocyanins was investigated using glucuronosylated anthocyanins isolated from the flower petals of the red daisy (Bellis perennis) or obtained by enzymatic in vitro synthesis using heterologously expressed red daisy glucuronosyltransferase BpUGT94B1. Color stability toward light and heat stress was assessed by monitoring CIELAB color coordinates and stability at pH 7.0 by A(550). Cyanidin-3-O-2''-O-glucuronosylglucoside showed improved color stability in response to light compared to both cyanidin 3-O-glucoside and cyanidin 3-O-2''-O-diglucoside. A similar increase in color stability was not observed following heat treatment. Glucuronosylation did not increase the stability of anthocyanins at pH 7.0 as determined by A(550). To test for a possible effect of glucuronosylation on the color stability of anthocyanins in plant extracts used for food coloration, an elderberry (Sambucus nigra) extract was glucuronosylated in vitro. Glucuronosylation of approximately 50% of total anthocyanins proceeded fast and resulted in increased color stability in response to both heat and light. The data show that glucuronosylation may be used to stabilize industrially used extracts of natural colorants.
Sarah Anne Osmani; Esben Halkjaer Hansen; Céline Malien-Aubert; Carl-Erik Olsen; Søren Bak; Birger Lindberg Møller
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  57     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-16     Completed Date:  2009-07-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3149-55     Citation Subset:  IM    
Department of Plant Biology and Biotechnology, University of Copenhagen, Copenhagen, Denmark.
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MeSH Terms
Anthocyanins / chemistry*,  metabolism*
Asteraceae / chemistry,  enzymology
Drug Stability
Flowers / chemistry,  enzymology
Food Coloring Agents / chemistry
Glucuronosyltransferase / genetics,  metabolism*
Hot Temperature
Recombinant Proteins / metabolism
Sambucus / chemistry
Reg. No./Substance:
0/Anthocyanins; 0/Food Coloring Agents; 0/Recombinant Proteins; EC

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