title: Isolation and structural characterization of an R-form lipopolysaccharide from Yersinia enterocolitica serotype O:8.
abstract: The lipopolysaccharide (LPS) of strain 8081-c-R2, a spontaneous R-mutant of Yersinia enterocolitica serotype O:8, was isolated using extraction with phenol/chloroform/light petroleum. Its compositional analysis indicated the presence of D-GlcN, D-Glc, L-glycero-D-manno- and D-glycero-D-manno-heptose, 3-deoxy-D-manno-oct-2-ulosonic acid (Kdo) and phosphate. From deacylated LPS obtained after successive treatment with hydrazine and potassium hydroxide, three oligosaccharides (1-3) were isolated using high-performance anion-exchange chromatography, the structures of which were determined by compositional analysis and one- and two-dimensional NMR spectroscopy as [carbohydrate structure see text] in which all sugars are pyranoses, and R and R' represent beta-D-Glc (in 1 and 2) and beta-D-GlcN (in 1 only), respectively. D-alpha-D-Hep is D-glycero-alpha-D-manno-heptose, L-alpha-D-Hep is L-glycero-alpha-D-manno-heptose, Kdo is 3-deoxy-D-manno-oct-2-ulosonic acid, and P is phosphate. The liberated lipid A was analyzed by compositional analyses and MALDI-TOF MS. Its beta-D-GlcN4P-(1-->6)-alpha-D-GlcN-1-->P backbone is mainly tetra-acylated with two amide- and one ester-linked (at O3 of the reducing GlcN) (R)-3-hydroxytetradecanoic acid residues, and one tetradecanoic acid that is attached to the 3-OH group of the amide-linked (R)-3-hydroxytetradecanoic acid of the nonreducing GlcN. Additionally, small amounts of tri- and hexa-acylated lipid A species occur.
authors.affiliation: Division of Analytical Biochemistry, Center for Medicine and Biosciences, Borstel, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Oertelt
authors.forename: B
authors.initials: B
authors.lastname: Lindner
authors.forename: M
authors.initials: M
authors.lastname: Skurnik
authors.forename: O
authors.initials: O
authors.lastname: Holst
mesh_terms: D002240:Carbohydrate Sequence; D002852:Chromatography, Ion Exchange; D004591:Electrophoresis, Polyacrylamide Gel; D006834:Hydrazines / Q000494:pharmacology; D006878:Hydroxides / Q000494:pharmacology; D008050:Lipid A / Q000737:chemistry; D008070:Lipopolysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D008969:Molecular Sequence Data; D010710:Phosphates / Q000737:chemistry; D010957:Plasmids / Q000378:metabolism; D017680:Potassium Compounds / Q000494:pharmacology; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D015008:Yersinia enterocolitica / Q000737:chemistry*
chemical_list: D006834:Hydrazines; D006878:Hydroxides; D008050:Lipid A; D008070:Lipopolysaccharides; D010710:Phosphates; D017680:Potassium Compounds; C029424:hydrazine; C029943:potassium hydroxide