The structure of the Shigella boydii type 5 O-antigen polysaccharide has been investigated by sugar and methylation analyses, and specific degradations. It is proposed that it is composed of hexasaccharide repeating units with the following structure. The repeating unit also contains an O-acetyl gr
Structure of the O-specific polysaccharide chain of Shigella boydii type 5 lipopolysaccharide: a repeated study
β Scribed by Vyacheslav L. L'vov; Aleksander S. Shashkov; Yuriy A. Knirel; Aleksandra E. Arifulina; Sof'ya N. Senchenkova; Aleksander V. Yakovlev; Boris A. Dmitriev
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 628 KB
- Volume
- 279
- Category
- Article
- ISSN
- 0008-6215
No coin nor oath required. For personal study only.
β¦ Synopsis
An acidic, partially O-acetylated O-specific polysaccharide was obtained by mild acid degradation of Shigella boydii type 5 lipopolysaccharide and studied by 1H and 13C NMR spectroscopy, including 2D COSY, 13C-1H heteronuclear COSY, 1D NOE, and 2D ROESY experiments, and chemical methods (sugar and methylation analysis, O-deacetylation, carboxyl reduction, solvolysis with anhydrous HF, partial acid hydrolysis. Smith degradation). It was concluded that the polysaccharide has a hexasaccharide repeating unit of the following structure: [Formula: See Text] with the degree of O-acetylation varying over 30-50%. The established structure differs from that proposed recently for the O-specific polysaccharide of the same S. boydii serotype [M.J. Albert et al., Carbohydr. Res., 265 (1994) 121-127].
π SIMILAR VOLUMES
NMR 0-Specific polysaccharide chains of lipopolysaccharides of a number of serotypes of an enterobacterium, Citrobacter freundii, have been structurally elucidated [l-3]. We now report the structure of a new 0-specific polysaccharide isolated from C. jkuzdii 028,lc.
The structure of Citrobacter O23-specific polysaccharide has been shown by sugar and methylation analyses of the native and chemically degraded polysaccharide and by 1H- and 13C-n.m.r. spectroscopy to consist of the tetrasaccharide repeating-units: ----4)-alpha-D-Man-(1----2)-alpha-D-Man-(1----2)-be
The O-specific polysaccharide isolated from the lipopolysaccharide of Enterobacter agglomerans was found, by methylation analysis, periodate oxidation, oxidative deamination, and NMR spectroscopy, to
Lipopolysaccharide (LPS) was isolated from Yersinia enterocolitica serovars O : 10 and O : 10 KL and the structural pattern of O-specific sugar chains elucidated. The rhamnan and L-xylulose (L-threo-pent-2-ulose) as constituents of the O-specific polysaccharide were obtained by autohydrolysis of the