title: Close relation of the O-polysaccharide structure of Escherichia coli O168 and revised structure of the O-polysaccharide of Shigella dysenteriae type 4.
abstract: The O-polysaccharide was isolated from the lipopolysaccharide of Escherichia coli O168 and studied by chemical analyses and Smith degradation along with (1)H and (13)C NMR spectroscopies. The following structure of the branched pentasaccharide repeating unit of the O-polysaccharide was established: [carbohydrate structure: see text] where 6-O-acetylation of GlcNAc is partial. Reinvestigation of the O-polysaccharide of Shigella dysenteriae type 4 established earlier showed it to have the same structure except for that the lateral Fuc residue is nonstoichiometrically O-acetylated at each position.
authors: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation. perepel@ioc.ac.ru
authors: Andrei V
authors: AV
authors: Perepelov
authors: Bin
authors: B
authors: Liu
authors: Sof'ya N
authors: SN
authors: Senchenkova
authors: Alexander S
authors: AS
authors: Shashkov
authors: Lu
authors: L
authors: Feng
authors: Yuriy A
authors: YA
authors: Knirel
authors: Lei
authors: L
authors: Wang
mesh_terms: D000107:Acetylation; D000942:Antigens, Bacterial / Q000737:chemistry*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002621:Chemistry / Q000379:methods*; D004926:Escherichia coli / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D019081:O Antigens / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D012762:Shigella dysenteriae / Q000378:metabolism*
chemical_list: D000942:Antigens, Bacterial; D019081:O Antigens; D011135:Polysaccharides, Bacterial; D010100:Oxygen