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Structure of the Polysaccharide O-Antigen of Salmonella Aberdeen (O : 11)

Szafranek J., Kaczyńska M., Kaczyński Z., Gajdus J., Czerwicka M., Dziadziuszko H., Głośnicka R.

Polish Journal of Chemistry

2003

Vol. 77 / nr 9

1135-1140

O-specific polysaccharide (OPS) of Salmonella Aberdeen was obtained from bacterial cell mass by water-phenol extraction procedure of lipopolysaccharide (LPS) followed by its mild acid hydrolysis and gel filtration of soluble carbohydrate material. Rhamnose, galactose, N-acetyl-glucosamine and mannose were detected and their linkages were established. Sugar configurations, D or L, were determined for (S)-(+)-2-butyl glycosides on an achiral capillary column. The structure of OPS was determined by analysis of spectra of 1H and 13C NMR and homonuclear and heteronuclear correlations spectra. Anomeric configurations were tentatively assigned by chromium trioxide oxidation and later proved by anomeric proton chemical shifts, H1-H2 coupling constants and proton coupled 13C spectra. Sugar sequences were established from comparisons of specific carbon shifts with those from literature, two-dimensional nuclear Overhauser effect spectroscopy (NOESY) and heteronuclear multiple-bond correlation experiments (HMBC). The repeating unit of S. Aberdeen OPS has the structure: _3)-_-D-GlcpNAc-(1_3)-[ _-D-Manp-(1_4)-]_-D-Galp-(1_4)-_-L-Rhap-(1_

Structure of the O-antigenic polysaccharides of Proteus bacteria

Knirel Y., Kaca W., Rozalski A., Sidorczyk Z.

Polish Journal of Chemistry

1999

vol. 73 nr 6

895-907

Data on the composition and structure of the O-specific polysaccharides (O-antigens) of the lopopolysaccharides of the genus Proteus are summarized and discussed as the molecular basis for serotyping of these medically important bacteria.