title: Structural analysis of a bioactive polysaccharide, PISP1, from the medicinal mushroom Phellinus igniarius.
abstract: PISP1, a heteropolysaccharide isolated from fruiting bodies of Phellinus igniarius by hot aqueous extraction and purified by DEAE-Sepharose anion-exchange and gel filtration chromatography, is composed of fucose, galactose, mannose, and 3-O-Me-galactose in a ratio of 1:2:1:2. Methylation, monosaccharide analysis, and NMR studies (1H NMR, 13C NMR, COSY-45 degrees , TOCSY, ROESY, HSQC, and HMBC) revealed that PISP1 had a backbone consisting of 1,6-disubstituted-3-O-Me-alpha-D-galactopyranosyl residue, 1,3,6-trisubstituted-alpha-D-manopyranosyl residue, 1,4-disubstituted-alpha-D-galactopyranosyl residue, and 1,2-disubstituted-alpha-D-galactopyranosyl residue, and had a 1-substituted-alpha-L-fucopyranosyl terminal attached to O-3 of a manopyranosyl residue. Preliminary bioactivity tests conducted in vitro revealed that PISP1 stimulated the proliferation of mouse spleen lymphocytes.
authors.affiliation: Institute of Edible Fungi, Shanghai Academy of Agricultural Sciences. yangyan3303@163.com
authors.forename: Yan
authors.initials: Y
authors.lastname: Yang
authors.forename: Libin
authors.initials: L
authors.lastname: Ye
authors.forename: Jingsong
authors.initials: J
authors.lastname: Zhang
authors.forename: Yanfang
authors.initials: Y
authors.lastname: Liu
authors.forename: Qingjiu
authors.initials: Q
authors.lastname: Tang
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D000818:Animals; D049109:Cell Proliferation / Q000187:drug effects; D048690:Fruiting Bodies, Fungal / Q000737:chemistry; D008214:Lymphocytes / Q000166:cytology; D051379:Mice; D015394:Molecular Structure; D009005:Monosaccharides / Q000032:analysis; D011134:Polysaccharides / Q000737:chemistry* / Q000494:pharmacology; D013154:Spleen / Q000166:cytology
chemical_list: D009005:Monosaccharides; D011134:Polysaccharides