title: Structural heterogeneity in the O polysaccharide of Pseudomonas syringae pv. coriandricola GSPB 2028 (NCPPB 3780, W-43).
abstract: The O polysaccharide (OPS) of the lipopolysaccharide of Pseudomonas syringae pv. coriandricola GSPB 2028 (NCPPB 3780, W-43) was studied by Smith degradation and 1H-NMR and 13C-NMR spectroscopy, including two-dimensional COSY, TOCSY, NOESY, and H-detected 1H,13C heteronuclear multiple-quantum coherence (HMQC) experiments. The OPS was shown to consist of pentasaccharide O repeats of two types both containing four L-rhamnose and one 3-acetamido-3,6-dideoxy-D-galactose (D-Fuc3NAc) residue. Structure 1 of the major O repeat which had been established earlier [Das, S., Ramm, M., Kochanowski, H. & Basu, S. (1994) J. Bacteriol. 176, 6550-6557], was confirmed by our data, and a new structure 2 was elucidated for the minor O repeat and found to differ from the structure 1 only in the position of substitution of one of the rhamnose residues in the main chain. [structures: see text] A role of structural and immunochemical features of the LPS for defining the taxonomical position of the bacterium studied is discussed.
authors.affiliation: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation. knirel@ioc.ac.ru
authors.forename: Y A
authors.initials: YA
authors.lastname: Knirel
authors.forename: V V
authors.initials: VV
authors.lastname: Ovod
authors.forename: N A
authors.initials: NA
authors.lastname: Paramonov
authors.forename: K J
authors.initials: KJ
authors.lastname: Krohn
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D019081:O Antigens / Q000737:chemistry* / Q000276:immunology; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000276:immunology; D011549:Pseudomonas / Q000737:chemistry* / Q000276:immunology; D017421:Sequence Analysis; D012699:Serology
chemical_list: D019081:O Antigens; D011135:Polysaccharides, Bacterial