Structural characterization of a 2-O-acetylglucomannan from Dendrobium officinale stem

Yun Fen Hua, Ming Zhang, Cheng Xin Fu, Zhang Hui Chen, Yuk Sing Gilbert Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

112 Citations (Scopus)

Abstract

A heteropolysaccharide obtained from an aqueous extract of dried stem of Dendrobium officinale Kimura and Migo by anion-exchange chromatography and gel-permeation chromatography, was investigated by chemical techniques and NMR spectroscopy, and is demonstrated to be a 2-O-acetylglucomannan, composed of mannose, glucose, and arabinose in 40.2:8.4:1 molar ratios. It has a backbone of (1→4)-linked β-D-mannopyranosyl residues and β-D-glucopyranosyl residues, with branches at O-6 consisting of terminal and (1→3)-linked Manp, (1→3)-linked Glcp, and a small proportion of arabinofuranosyl residues at the terminal position. The acetyl groups are substituted at O-2 of (1→4)-linked Manp and Glcp. The main repeating unit of the polysaccharides is reported.
Original languageEnglish
Pages (from-to)2219-2224
Number of pages6
JournalCarbohydrate Research
Volume339
Issue number13
DOIs
Publication statusPublished - 13 Sep 2004

Keywords

  • Dendrobium officinale Kimura and Migo
  • Glucomannan
  • Polysaccharide
  • Structure

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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