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Feruloyl esterase-catalysed synthesis of glycerol sinapate using ionic liquids mixtures

Paper ID Volume ID Publish Year Pages File Format Full-Text
24767 43535 2009 6 PDF Available
Title
Feruloyl esterase-catalysed synthesis of glycerol sinapate using ionic liquids mixtures
Abstract

The ability of a feruloyl esterase (AnFaeA), either in free or immobilised (cross-linked enzyme aggregates) form, to catalyse the esterification of glycerol, a major by-product of the biodiesel industry, with sinapic acid was studied in four hexafluorophosphate anion-containing ionic liquids: ([Bmim][PF6], [Omim][PF6], [C2OHmim][PF6] and [C5O2mim][PF6]). Such ionic liquids are considered ‘green’ reaction systems. The synthetic reaction was optimised in [C2OHmim][PF6] and the highest conversion yield was 72.5 ± 2.1%, while, at the same reaction conditions in [C5O2mim] [PF6], a similar conversion yield was obtained (76.7 ± 1.5%). AnFaeA was active in its free and immobilised form, with the latter retaining a part of its synthetic activity after 5 consecutive 24 h-period reaction cycles. Sinapic acid was esterified to one of the primary hydroxyl groups of glycerol and retained, after esterification, 63.1 ± 0.3% and 89.5 ± 1.1% of its antioxidant activity against low-density lipoprotein oxidation, when added at concentrations of 10 and 60 μM, respectively, in the assay mixture.

Keywords
FAE, feruloyl esterase; HCA, hydroxycinnamic acid; MHCA, methyl ester of hydroxycinnamic acid; FA, ferulic acid; SA, sinapic acid; pCA, p-coumaric acid; CA, caffeic acid; MSA, methyl sinapic acid; CLEAs, cross-linked enzyme aggregates; LDL, low-density li
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Feruloyl esterase-catalysed synthesis of glycerol sinapate using ionic liquids mixtures
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 139, Issue 1, 1 January 2009, Pages 124–129
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us