Further studies on the structure of polysaccharides from the lichen Flavoparmelia caperata (L.) Hale

Tadahiro Takeda, Noriko Shimizu, Sachiko Watanabe, Yoshikuni Edagawa, Yoshihisa Ito, Takao Narui, Shoji Shibata

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A water-soluble polysaccharide called PC-2 was previously isolated from Flavoparmelia caperata (L.) Hale and assigned to α(1-3)(1-4)glucan. However, PC-2 separated into three components, PC-2A, PC-2B, and PC-2C (a single peak in HPLC, respectively) on further purification. Methylation analysis and 1H- and 13C-NMR spectroscopic studies suggested that PC-2A is composed of repeating units of [α-D-Glc1-3]3, : [α-D-Glc1-4]2, while PC-2B and PC-2C are partly branched galactoglucomannans consisting of (1-3)- and (1-4)-linked α-D- glucopyranosyl units as the main chain. In addition we confirmed that the polysaccharide fraction PB-2 from the lichen of the same genus, Flavoparmelia baltimorensis (Gyelnik & Foriss) Hale, is identical to PC-2 based on the chemical and spectroscopic data.

Original languageEnglish
Pages (from-to)1436-1438
Number of pages3
JournalChemical and Pharmaceutical Bulletin
Volume51
Issue number12
DOIs
Publication statusPublished - 2003 Dec 1
Externally publishedYes

Keywords

  • Flavoparmelia baltimorensis
  • Flavoparmelia caperata
  • α(1-3)(1-4)glucan (3 : 2)

ASJC Scopus subject areas

  • Chemistry(all)
  • Drug Discovery

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