title: Characterization of O-antigens from different strains of Pseudomonas syringae pv. tabaci.
abstract: O-Antigens (lipopolysaccharides, LPS) were isolated by NaCl extraction from microbial biomass of Pseudomonas syringae pv. tabaci and purified by ultracentrifugation. Individual structural components of the LPS macromolecule (O-specific polysaccharide (O-PS), core oligosaccharide, and lipid A) were obtained and characterized. Fatty acids 3-OH-C10:0, C12:0, 2-OH-C12:0, 3-OH-C12:0, C16:1, C16:0, C18:1, and C18:0 were identified in the lipid A composition. Glucosamine, ethanolamine, and phosphoethanolamine were found in the hydrophilic part of the lipid A macromolecule in all strains tested. Lipid A preparations contained phosphorus and amino acids. Rhamnose, glucose, glucosamine, 2-keto-3-deoxyoctulosonic acid, heptose, alanine, and phosphorus were identified as the main core components. The strains differed in O-PS structure. We describe the O-chain of LPS in strain P-28. It contains repeating units of the following structure: [formula: see text] The O-PS structures of LPS from strains P-28 and 225 are identical, however, they differ substantially from that of strain 223. Both structures from strains 223 and 225 were reported previously. Antibodies to antigenic epitopes of O-PS, core, and lipid A were revealed in O-serum against the whole bacterial cells. Correlation of O-PS structure with the serological grouping of strains was observed.
authors.affiliation: Zabolotnyi Institute of Microbiology and Virology, National Academy of Sciences of Ukraine.
authors.forename: G M
authors.initials: GM
authors.lastname: Zdorovenko
authors.forename: L P
authors.initials: LP
authors.lastname: Solyanik
authors.forename: L M
authors.initials: LM
authors.lastname: Yakovleva
authors.forename: N A
authors.initials: NA
authors.lastname: Paramonov
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D003429:Cross Reactions; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D019081:O Antigens / Q000737:chemistry* / Q000276:immunology; D011549:Pseudomonas / Q000276:immunology*; D013045:Species Specificity
chemical_list: D019081:O Antigens