Structure of a new arabinoxylan from the bark of Cinnamomum iners

J. Pape Gowda, Channe Gowda, Yernool V. Anjaneyalu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Two polysaccharide fractions, water-soluble (24%) composed of d-xylose and l-arabinose, and alkali-soluble (15%) composed of l-arabinose, d-xylose, and d-glucose, have been isolated from the delignified bark of Cinnamomum zeylanicum. The water-soluble fraction gave an arabinoxylan (60%) composed of l-arabinose and d-xylose in the molar ratio 1.45: 1.00. Methylation analysis, together with the isolation of the oligosaccharides 3-O-α-d-xylopyranosyl-l-arabinose, 4-O-β-d-xylopyranosyl-d-xylose, O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose, and O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose after partial hydrolysis with acid, suggested that the polysaccharide contained a backbone of (1 →4)-linked β-d-xylosyl residues each of which was substituted both at O-2 and O-3 with l-arabinofuranosyl and 3-O-α-d-xylopyranosyl-l-arabinofuranosyl groups. Very mild hydrolysis with acid gave a degraded polysaccharide, containing 10% of l-arabinose and 90% of d-xylose, which was essentially a (1→)-linked β-d-xylan carrying a limited number of branches at O-2 and O-3. These results together with those from periodate-oxidation and Smith-degradation studies support the proposed structure.

Original languageEnglish (US)
Pages (from-to)241-248
Number of pages8
JournalCarbohydrate Research
Volume87
Issue number2
DOIs
StatePublished - Dec 15 1980

Fingerprint

Cinnamomum
Xylose
Arabinose
Polysaccharides
Hydrolysis
Cinnamomum zeylanicum
Xylans
Acids
Water
Alkalies
Methylation
Oligosaccharides
arabinoxylan
Glucose
Degradation
Oxidation

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

Cite this

Pape Gowda, J. ; Gowda, Channe ; Anjaneyalu, Yernool V. / Structure of a new arabinoxylan from the bark of Cinnamomum iners. In: Carbohydrate Research. 1980 ; Vol. 87, No. 2. pp. 241-248.
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title = "Structure of a new arabinoxylan from the bark of Cinnamomum iners",
abstract = "Two polysaccharide fractions, water-soluble (24{\%}) composed of d-xylose and l-arabinose, and alkali-soluble (15{\%}) composed of l-arabinose, d-xylose, and d-glucose, have been isolated from the delignified bark of Cinnamomum zeylanicum. The water-soluble fraction gave an arabinoxylan (60{\%}) composed of l-arabinose and d-xylose in the molar ratio 1.45: 1.00. Methylation analysis, together with the isolation of the oligosaccharides 3-O-α-d-xylopyranosyl-l-arabinose, 4-O-β-d-xylopyranosyl-d-xylose, O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose, and O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose after partial hydrolysis with acid, suggested that the polysaccharide contained a backbone of (1 →4)-linked β-d-xylosyl residues each of which was substituted both at O-2 and O-3 with l-arabinofuranosyl and 3-O-α-d-xylopyranosyl-l-arabinofuranosyl groups. Very mild hydrolysis with acid gave a degraded polysaccharide, containing 10{\%} of l-arabinose and 90{\%} of d-xylose, which was essentially a (1→)-linked β-d-xylan carrying a limited number of branches at O-2 and O-3. These results together with those from periodate-oxidation and Smith-degradation studies support the proposed structure.",
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Structure of a new arabinoxylan from the bark of Cinnamomum iners. / Pape Gowda, J.; Gowda, Channe; Anjaneyalu, Yernool V.

In: Carbohydrate Research, Vol. 87, No. 2, 15.12.1980, p. 241-248.

Research output: Contribution to journalArticle

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N2 - Two polysaccharide fractions, water-soluble (24%) composed of d-xylose and l-arabinose, and alkali-soluble (15%) composed of l-arabinose, d-xylose, and d-glucose, have been isolated from the delignified bark of Cinnamomum zeylanicum. The water-soluble fraction gave an arabinoxylan (60%) composed of l-arabinose and d-xylose in the molar ratio 1.45: 1.00. Methylation analysis, together with the isolation of the oligosaccharides 3-O-α-d-xylopyranosyl-l-arabinose, 4-O-β-d-xylopyranosyl-d-xylose, O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose, and O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose after partial hydrolysis with acid, suggested that the polysaccharide contained a backbone of (1 →4)-linked β-d-xylosyl residues each of which was substituted both at O-2 and O-3 with l-arabinofuranosyl and 3-O-α-d-xylopyranosyl-l-arabinofuranosyl groups. Very mild hydrolysis with acid gave a degraded polysaccharide, containing 10% of l-arabinose and 90% of d-xylose, which was essentially a (1→)-linked β-d-xylan carrying a limited number of branches at O-2 and O-3. These results together with those from periodate-oxidation and Smith-degradation studies support the proposed structure.

AB - Two polysaccharide fractions, water-soluble (24%) composed of d-xylose and l-arabinose, and alkali-soluble (15%) composed of l-arabinose, d-xylose, and d-glucose, have been isolated from the delignified bark of Cinnamomum zeylanicum. The water-soluble fraction gave an arabinoxylan (60%) composed of l-arabinose and d-xylose in the molar ratio 1.45: 1.00. Methylation analysis, together with the isolation of the oligosaccharides 3-O-α-d-xylopyranosyl-l-arabinose, 4-O-β-d-xylopyranosyl-d-xylose, O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose, and O-β-d-xylopyranosyl-(1→4)-O-β-d-xylopyranosyl-(1→4)-d-xylose after partial hydrolysis with acid, suggested that the polysaccharide contained a backbone of (1 →4)-linked β-d-xylosyl residues each of which was substituted both at O-2 and O-3 with l-arabinofuranosyl and 3-O-α-d-xylopyranosyl-l-arabinofuranosyl groups. Very mild hydrolysis with acid gave a degraded polysaccharide, containing 10% of l-arabinose and 90% of d-xylose, which was essentially a (1→)-linked β-d-xylan carrying a limited number of branches at O-2 and O-3. These results together with those from periodate-oxidation and Smith-degradation studies support the proposed structure.

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