title: [Structure of the O-specific polysaccharide chain of Shigella dysenteriae type 7 lipopolysaccharide].
abstract: The structure of the O-specific polysaccharide chain of the Shigella dysenteriae type 7 lipopolysaccharide has been established mainly by 13C NMR analysis of the intact and modified (acetylated and de-O-acetylated) polymers, as well as of products of its solvolysis with anhydrous hydrogen fluoride. The polysaccharide contains two unusual sugar derivatives. N-acetyl-D-galactosaminuronamide and 4-(N-acetylglycyl)amido-4,6-dideoxy-D-glucose (GalNAcAN and Qui4N----GlyAc, respectively) and is built up of tetrasaccharide repeating units of the following structure: (Formula: see text). Serological cross-reaction of S. dysenteriae type 7 and Pseudomonas aeruginosa O4 (Lányl) is accounted for by the similarity of their O-specific polysaccharides.
mesh_terms: D000942:Antigens, Bacterial / Q000032:analysis*; D002240:Carbohydrate Sequence; D055598:Chemical Phenomena; D002621:Chemistry; D008070:Lipopolysaccharides / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D019081:O Antigens; D011550:Pseudomonas aeruginosa / Q000276:immunology; D012762:Shigella dysenteriae / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D008070:Lipopolysaccharides; D019081:O Antigens
vernacular_title: Stroenie O-spetsificheskoĭ polisakharidnoĭ tsepi lipopolisakharida Sgigella dysenteriae, tip 7.