title: Capsular polysaccharide of the bacterium Azospirillum lipoferum Sp59b: structure and antigenic specificity.
abstract: Antigenic differences were revealed between the cell wall outer membrane lipopolysaccharides and the capsular high molecular weight bioglycans for a typical strain of the nitrogen-fixing rhizobacterium Azospirillum lipoferum Sp59b using antibodies prepared against the homologous lipopolysaccharide and lipopolysaccharide-protein complex. From the capsular lipopolysaccharide-protein and polysaccharide-lipid complexes of A. lipoferum Sp59b, polysaccharides were isolated and their structure was for the first time established in Azospirillum by monosaccharide analysis which included determination of the absolute configurations, methylation, O-deacetylation, and one- and two-dimensional NMR spectroscopy. The polysaccharides of the capsular complexes were shown to have identical structure of the branched tetrasaccharide repeating unit, which differs from the structure of the O-specific polysaccharide within the outer membrane lipopolysaccharide of this strain.
authors.affiliation: Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Saratov, 410049, Russia. room308@ibppm.sgu.ru
authors.forename: O N
authors.initials: ON
authors.lastname: Smol'kina
authors.forename: V V
authors.initials: VV
authors.lastname: Kachala
authors.forename: Yu P
authors.initials: YP
authors.lastname: Fedonenko
authors.forename: G L
authors.initials: GL
authors.lastname: Burygin
authors.forename: E L
authors.initials: EL
authors.lastname: Zdorovenko
authors.forename: L Yu
authors.initials: LY
authors.lastname: Matora
authors.forename: S A
authors.initials: SA
authors.lastname: Konnova
authors.forename: V V
authors.initials: VV
authors.lastname: Ignatov
mesh_terms: D042081:Azospirillum lipoferum / Q000737:chemistry* / Q000276:immunology; D016667:Bacterial Capsules / Q000737:chemistry* / Q000276:immunology; D002240:Carbohydrate Sequence; D000939:Epitopes / Q000276:immunology; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D019081:O Antigens / Q000737:chemistry / Q000276:immunology
chemical_list: D000939:Epitopes; D019081:O Antigens