Structural studies of water-soluble polysaccharides of an edible mushroom, Termitomyces eurhizus. A reinvestigation |
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Authors: | Mondal Soumitra Chakraborty Indranil Pramanik Malay Rout Dilip Islam Syed S |
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Institution: | Department of Chemistry and Chemical Technology, Vidyasagar University, West Midnapore 721102, West Bengal, India. |
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Abstract: | The structure of two polysaccharides isolated from the hot aqueous extract of fruiting bodies of the mushroom, Termitomyces eurhizus, have been reinvestigated. These consist of two homogeneous fractions PS-I and PS-II. PS-I contains only D-glucose as the monosaccharide constituent. From methylation analysis and periodate oxidation studies, followed by GLC-MS analysis the linkages, the sugar units in PS-I were identified as (1-->3)-D-Glcp and (1-->6)-D-Glcp. PS-II contains D-glucose, and the mode of linkage of d-glucose was identified as (1-->6)-D-Glcp. Finally, the following possible structures of the polysaccharides were assigned using 1H, 2D-COSY, TOCSY, NOESY and 13C NMR spectral analysis: carbohydrate structure: see text]. |
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Keywords: | Mushroom polysaccharide Termitomyces eurhizus Structure NMR analysis |
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