Document Detail

Evidence of the presence of 2-O-beta-D-xylopyranosyl-alpha-l-arabinofuranose side chains in barley husk arabinoxylan.
MedLine Citation:
PMID:  17081509     Owner:  NLM     Status:  MEDLINE    
(Glucurono)arabinoxylans were extracted from barley husks and degraded with endo-beta-xylanase or subjected to periodate oxidation. The released oligosaccharide fragments were separated and isolated on Biogel-P2, and their structures were determined by NMR spectroscopy. The oligosaccharides identified consisted of beta-d-(1-->4)-linked xylopyranosyl residues, of which some were substituted at O-3 with alpha-l-arabinofuranosyl groups or at O-2 with 4-O-methylglucuronic acid. In addition to these substituents, a disaccharide side chain, 2-O-beta-d-xylopyranosyl-alpha-l-arabinofuranose, attached at position O-3 of the main chain, was proved to exist in arabinoxylan from barley husks. The compound was fully characterized with NMR, and all (1)H and (13)C NMR signals were assigned. The arabinose to xylose ratio was low (approximately 0.2) and no 2,3-disubstitution existed. No blocks of substituted xylose residues could be observed along the main chain.
Anders Höije; Corine Sandström; Johannes P Roubroeks; Roger Andersson; Suresh Gohil; Paul Gatenholm
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-10-12
Journal Detail:
Title:  Carbohydrate research     Volume:  341     ISSN:  0008-6215     ISO Abbreviation:  Carbohydr. Res.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-11-27     Completed Date:  2007-02-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0043535     Medline TA:  Carbohydr Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  2959-66     Citation Subset:  IM    
Chalmers University of Technology, Department of Chemical and Biological Engineering, Biopolymer Technology, SE-412 96 Göteborg, Sweden.
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MeSH Terms
Carbohydrate Sequence
Hordeum / chemistry*
Molecular Sequence Data
Nuclear Magnetic Resonance, Biomolecular
Oligosaccharides, Branched-Chain / chemistry
Periodic Acid / chemistry
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
Xylans / chemistry*
Reg. No./Substance:
0/Oligosaccharides, Branched-Chain; 0/Xylans; 10450-60-9/Periodic Acid; 7790-28-5/metaperiodate; 9040-27-1/arabinoxylan

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