Synthesis of guaiacol-alpha-D-glucoside and curcumin-bis-alpha-D-glucoside by an amyloglucosidase from Rhizopus
IR@CFTRI: CSIR-Central Food Technological Research Institute, Mysore
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http://ir.cftri.com/1970/
DOI 10.1007/s10529-005-3691-8 |
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| Title |
Synthesis of guaiacol-alpha-D-glucoside and curcumin-bis-alpha-D-glucoside by an amyloglucosidase from Rhizopus
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| Creator |
Vijayakumar, G. R.
Divakar, S. |
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| Subject |
10 Food Microorganisms
31 Food Additives 07 Turmeric 11 Food Biochemistry 30 Spices/Condiments 08 Food Chemistry |
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| 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.
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| Date |
2005
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| Type |
Article
NonPeerReviewed |
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| Format |
application/pdf
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| Language |
en
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| Rights |
—
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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 |
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