title: Lipopolysaccharide of Campylobacter coli serotype O:30. Fractionation and structure of liberated core oligosaccharide.
abstract: Lipopolysaccharide from phenol-water extraction of cells of Campylobacter coli serotype O:30 was separated as a water-insoluble gel of low M(r) from a water-soluble antigenic polysaccharide of high M(r). Acetic acid hydrolysis of the ketosidic linkages to lipid A in the lipopolysaccharide furnished a core oligosaccharide. Structural investigations were performed using 1H and 13C NMR, fast atom bombardment-mass spectrometry of permethylated derivatives, and methylation linkage analysis on the core oligosaccharide and the products of two successive Smith degradations. It is concluded that the highly branched 3-deoxy-D-manno-octulosonic acid-terminated oligosaccharide chains carried at the nonreducing end disaccharide units of beta-D-Qui3NAc-(1-->2)-beta-D-Qui3NAc (where Qui3NAc represents 3-acylamino-3,6-dideoxy-D-glucose), in which N-acyl residues were either both (R)-3-hydroxybutanoyl or both 3-hydroxy-2,3-dimethyl-5-oxoprolyl. The demonstration of these unusual features provides further evidence for a wide variety of structures within the core oligosaccharide region of lipopolysaccharides from Campylobacter sp.
authors.affiliation: Department of Chemistry, York University, Toronto, Ontario, Canada.
authors.forename: G O
authors.initials: GO
authors.lastname: Aspinall
authors.forename: A G
authors.initials: AG
authors.lastname: McDonald
authors.forename: H
authors.initials: H
authors.lastname: Pang
authors.forename: L A
authors.initials: LA
authors.lastname: Kurjanczyk
authors.forename: J L
authors.initials: JL
authors.lastname: Penner
mesh_terms: D017000:Campylobacter coli / Q000737:chemistry* / Q000145:classification; D002240:Carbohydrate Sequence; D005591:Chemical Fractionation; D008070:Lipopolysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008969:Molecular Sequence Data; D012703:Serotyping; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D008070:Lipopolysaccharides