A polysaccharide (PS), isolated from the hot aqueous extract of the mushroom, Termitomyces eurhizus, is found to contain, D-glucose, D-galactose, D-mannose and D-galacturonic acid in a mole ratio of about 0.9:0.9:1.0:0.9. From the periodate oxidation and methylation analysis of the PS, the linkages among the constituent sugar residues are identified as, D-Galp (1,6 linked), D-Manp (1,2,3 linked), D-Glcp (1,3 linked) and D-galacturonic acid. The anomeric configuration of the constituent sugar residues are determined by the chromium trioxide oxidation studies of the acetylated polysaccharide. It is concluded that galactose and mannose have the β-configuration while glucose and galacturonic acid have the α-configuration. Based on the above observations, the structure of the repeating unit of the polysaccharide was assigned as structure.

polysaccharide, galacturonic acid, galactose, Galactomannan, Termitomyces eurhizus

• Compound ID: 18811
  

  a-D-GalpA-(1-2)-+ | -6)-b-D-Galp-(1-3)-b-D-Manp-(1-3)-a-D-Glcp-(1-

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  Structure type: structural motif or average structure
  Compound class: O-polysaccharide, glucogalactomannan
  Reference(s) to other database(s): GTC:G74638SQ
  
   
  
  Termitomyces eurrhizus
  CSDB ID 43867 (all data & tools)