title: Structure of simusan, a new acidic exopolysaccharide from Arthrobacter sp.
abstract: Simusan, a major exopolysaccharide produced by an ethanol-utilizing Arthrobacter sp. strain CE-17, contains D-glucose, D-mannose, D-galactose, L-rhamnose, D-glucuronic acid, and pyruvic acid in the ratios approximately 3:2:1:1:1:1 as well as O-acyl groups (presumably (presumably residues of acetic and palmitic acid). On the basis of chemical modifications of the polysaccharide, solvolysis with anhydrous hydrogen fluoride resulting in a penta- and an octa-saccharide fragment, Smith degradation, and 1H and 13C NMR analysis, the following structure of the repeating unit was established: [formula: see text] It is suggested that at least one of the glucose residues and the galactose residue are O-acetylated.
authors.affiliation: N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation.
authors.forename: S N
authors.initials: SN
authors.lastname: Senchenkova
authors.forename: Y A
authors.initials: YA
authors.lastname: Knirel
authors.forename: L M
authors.initials: LM
authors.lastname: Likhosherstov
authors.forename: A S
authors.initials: AS
authors.lastname: Shashkov
authors.forename: V N
authors.initials: VN
authors.lastname: Shibaev
authors.forename: L A
authors.initials: LA
authors.lastname: Starukhina
authors.forename: V V
authors.initials: VV
authors.lastname: Deryabin
mesh_terms: D001173:Arthrobacter / Q000737:chemistry*; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D011135:Polysaccharides, Bacterial; C092853:simusan