title: Structure of an acidic polysaccharide from the agar-decomposing marine bacterium Pseudoalteromonas atlantica strain IAM 14165 containing 5,7-diacetamido-3,5,7,9-tetradeoxy-L-glycero-L-manno-non-2-ulosonic acid.
abstract: The structure of an acidic polysaccharide from Pseudoalteromonas atlantica strain 14165 containing 5,7-diacetamido-3,5,7,9-tetradeoxy-L-glycero-L-manno-non-2-ulosonic acid (di-N-acetylpseudaminic acid, Pse5Ac7Ac) has been elucidated. The polysaccharide was studied by 1H and 13C NMR spectroscopy, including 2D experiments, along with sugar and methylation analyses. After a selective hydrolysis a modified polysaccharide devoid of its side chain could be isolated. It was found that the polysaccharide has pentasaccharide repeating units with following structure: [structure: see text].
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Perepelov
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Shashkov
authors.forename: Vladimir I
authors.initials: VI
authors.lastname: Torgov
authors.forename: Evgeny L
authors.initials: EL
authors.lastname: Nazarenko
authors.forename: Raisa P
authors.initials: RP
authors.lastname: Gorshkova
authors.forename: Elena P
authors.initials: EP
authors.lastname: Ivanova
authors.forename: Natalya M
authors.initials: NM
authors.lastname: Gorshkova
authors.forename: Göran
authors.initials: G
authors.lastname: Widmalm
mesh_terms: D000362:Agar / Q000378:metabolism*; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D031161:Pseudoalteromonas / Q000737:chemistry* / Q000145:classification* / Q000378:metabolism; D012794:Sialic Acids / Q000032:analysis* / Q000737:chemistry
chemical_list: C502287:5,7-diacetamido-3,5,7,9-tetradeoxynon-2-ulosonic acid; D011135:Polysaccharides, Bacterial; D012794:Sialic Acids; D000362:Agar