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Synthesis of guaiacol-alpha-D-glucoside and curcumin-bis-alpha-D-glucoside by an amyloglucosidase from Rhizopus

IR@CSIR-CFTRI

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Relation http://ir.cftri.com/1970/
DOI 10.1007/s10529-005-3691-8
 
Title Synthesis of guaiacol-alpha-D-glucoside and curcumin-bis-alpha-D-glucoside by an amyloglucosidase from Rhizopus
 
Creator Vijayakumar, G. R.
Divakar, S.
 
Subject 10 Food Microorganisms
31 Food Additives
07 Turmeric
11 Food Biochemistry
30 Spices/Condiments
08 Food Chemistry
 
Description Guaiacol (2-methoxyphenol) and curcumin [1E,6E-1,7-di(4-hydroxy-3-methoxy-phenyl)-1,6-heptadiene-3,5-dione] were converted into their corresponding glucosides using glucose and an amyloglucosidase from Rhizopus. Guaiacol-alpha-D-glucoside yields ranged from 3 to 52% with the highest at pH 7.0. Curcumin-bis-alpha-D-glucoside yields ranged from 3 to 48% with the highest at pH 4.0 with 50% (w/w D-glucose) of enzyme. The phenolic hydroxyl group of guaiacol and both phenolic hydroxyl groups of curcumin were glucosylated at the C1 carbon of alpha-D-glucose indicating that the enzymatic reaction is stereospecific. Both guaiacol-alpha-D-glucoside and curcumin-bis-alpha-D-glucosides had antioxidant activities.
 
Date 2005
 
Type Article
NonPeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://ir.cftri.com/1970/1/Biotechnollet271411-1415.pdf
Vijayakumar, G. R. and Divakar, S. (2005) Synthesis of guaiacol-alpha-D-glucoside and curcumin-bis-alpha-D-glucoside by an amyloglucosidase from Rhizopus. Biotechnology Letters, 27. pp. 1411-1415. ISSN 0141-5492