title: Structure of a novel α-glucan substitute with the rare 6-deoxy-D-altrose from Lactarius lividatus (mushroom).
abstract: A novel α-glucan substituted rare 6-deoxy-D-altropyranose was isolated from edible fruiting bodies of a mushroom (Lactarius lividatus) grown in Okinawa, Japan. The polysaccharide consists of D-glucose, D-galactose and 6-deoxy-D-altrose in a molar ratio of 3.0:1.0:1.0. The specific rotation [α](589) was estimated as +64.3° (0.2% in water) at 25 °C. Based on results of IR, NMR ((1)H, (13)C, 2D-COSY, 2D-HMQC, 2D-ROESY and 2D-HMBC), and methylation analyses, the structure of the polysaccharide was determined as [formula, see text] This work is the first demonstration of rare 6-deoxy-D-altropyranose moiety on polysaccharides.
authors: Department of Subtropical Bioscience and Biotechnology, University of the Ryukyus, Nishiara, Okinawa 903-0213, Japan. tako@agr.u-ryukyu.ac.jp
authors: Masakuni
authors: M
authors: Tako
authors: Yahiko
authors: Y
authors: Dobashi
authors: Junpei
authors: J
authors: Shimabukuro
authors: Takuya
authors: T
authors: Yogi
authors: Keiko
authors: K
authors: Uechi
authors: Yukihiro
authors: Y
authors: Tamaki
authors: Teruko
authors: T
authors: Konishi
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D003837:Deoxy Sugars / Q000737:chemistry* / Q000302:isolation & purification; D005936:Glucans / Q000737:chemistry*; D006601:Hexoses / Q000737:chemistry* / Q000302:isolation & purification; D008745:Methylation
chemical_list: D003837:Deoxy Sugars; D005936:Glucans; D006601:Hexoses; C504992:alpha-1-6-glucan; C053979:6-deoxyaltrose