Structural analysis of an alkali-extractable and water-soluble polysaccharide (ABP-AW1) from the fruiting bodies of Agaricus blazei Murill

摘要

An alkali-extractable and water-soluble polysaccharide (ABP-AW1) was isolated by 5 sodium hydroxide solution from the fruiting bodies of Agaricus blazei. ABP-AW1 (M_w = 50 kDa), was composed of Gal, Glc, Fuc, Ara and Man with the molar ratio of 29: 20: 6: 2: 2. According to the combination of chemical and instrumental analysis, the results indicated that ABP-AW1 had a backbone consisting of (1-> 6)-linked-β-D-galactopyranosyl, (1 -> 6)-linked-β-D-glucopyranosyl and (1 -> 3, 6)-linked-β-D-glucopyranosyl, which was terminated with (1->)-linked Fuc, Ara and Man residues at the 0-3 position of (1->3, 6)-linked-β-D-glucopyranosyl in the proportion of 29: 10: 10: 6: 2:2.