title: Structure of the O-polysaccharide chain of the lipopolysaccharide of Vibrio anguillarum V-123.
abstract: The O-polysaccharide chain (PS-1), released by mild acidic treatment of the LPS of V. anguillarum V-123 (serogroup JO-2), a pathogenic bacterium of marine and estuarine fish, consists of 2-amino-2-deoxy-D-galacturonic acid, 2-amino-2,6-dideoxy-D-glucose (D-quinovosamine), and 4-amino-4,6-dideoxy-D-glucose (D-viosamine) N-acylated with 2,4-dihydroxy-3,3,4-trimethylpyroglutamic acid. Strong-acid hydrolysis of PS-1 afforded alpha-GalNA-(1----4)-alpha-GalNA-(1----3)-QuiN (A1) and alpha-GalNA-(1----3)-QuiN (A2), and hydrolysis with hydrogen fluoride gave N-acetylated A1 and 4-amino-4,6-dideoxy-D-glucose N-acylated by 2,4-dihydroxy-3,3,4-trimethylpyroglutamic acid. Mild treatment of PS-1 with alkali removed the N-formyl substituents and Smith degradation of the product gave alpha-QuiNAc-(1----3)-beta-VioNAcyl-(1----3)-alpha-GalNAc A-(1----3)-2,3,4- trihydroxybutanoic acid (S1) and S2 in which the carboxyl group of the GalNAcA residue was amidated. Thus, the repeating unit of the O-polysaccharide is----3)-alpha-GalNAcA(amino)-(1----4)-alpha-GalNFoA-(1----3 )- alpha-QuiNAc-(1----3)-beta-VioNAcyl-(1----in which the N-Acyl group is 2,4-dihydroxy-3,3,4-trimethylpyroglutamic acid and Fo is formyl.
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Eguchi
authors.forename: S
authors.initials: S
authors.lastname: Kaya
authors.forename: Y
authors.initials: Y
authors.lastname: Araki
authors.forename: N
authors.initials: N
authors.lastname: Kojima
authors.forename: S
authors.initials: S
authors.lastname: Yokota
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002845:Chromatography / Q000379:methods; D007202:Indicators and Reagents; D008070:Lipopolysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008969:Molecular Sequence Data; D015394:Molecular Structure; D009844:Oligosaccharides / Q000737:chemistry / Q000302:isolation & purification; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000302:isolation & purification; D014733:Vibrio / Q000737:chemistry*
chemical_list: D007202:Indicators and Reagents; D008070:Lipopolysaccharides; D009844:Oligosaccharides; D011135:Polysaccharides, Bacterial