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Synthesis of novel fructooligosaccharides by substrate and enzyme engineering

Paper ID Volume ID Publish Year Pages File Format Full-Text
24957 43548 2008 9 PDF Available
Title
Synthesis of novel fructooligosaccharides by substrate and enzyme engineering
Abstract

Fructooligosaccharides (FOSs) and polyfructosides (PSs) have received particular attention due to its beneficial effects as prebiotics. Here we report the synthesis of a new class of fructooligosaccharides by substrate and enzyme engineering. Using an engineered levansucrase enzyme (SacB of Bacillus subtilis), and sucrose analogues (α-Xyl-1,2-β-Fru or α-Gal-1,2-β-Fru), the product profile shifted from the fructan (levan) polymer to a range of new higher oligosaccharides (xylooligofructosides), or polysaccharides (galactopolyfructosides), of varying size. Further the enzyme was tailored by random mutagenesis, for the synthesis of short-chain fructooligosaccharides to yield variant A5 (N242H), which is unable to produce polymers. It shifts its product pattern to short-chain oligosaccharides and hydrolysis and enabled in combination with the sucrose analogue Xyl-Fru for the first time the direct synthesis of a 6-kestose analogue (α-Xyl-1,2-β-Fru-2,6-β-Fru). The different glycopyranosyl-residues (i.e. galactose and xylose) that cap fructooligosaccharides may alter prebiotic and biochemical properties.

Keywords
Kestose analogue; Oligosaccharides; Levansucrase; Enzyme engineering
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 138, Issues 1–2, 6 November 2008, Pages 33–41
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