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Structure of the O-polysaccharide of Providencia alcalifaciens O21 containing 3-formamido-3,6-dideoxy-D-galactose |
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| Authors: | Kocharova Nina A Maszewska Agnieszka Zatonsky George V Bystrova Olga V Ziolkowski Andrzej Torzewska Agnieszka Shashkov Aleksander S Knirel Yuriy A Rozalski Antoni |
| Institution: | N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991, GSP-1, Moscow, Russia. |
| Abstract: | The O-polysaccharide (O-antigen) of Providencia alcalifaciens O21 was obtained by mild acid degradation of the lipopolysaccharide and studied by chemical methods and NMR spectroscopy. It was found that the polysaccharide is built up of branched pentasaccharide repeating units with a terminal residue of 3-formamido-3,6-dideoxy-D-galactose (D-Fuc3NFo) and has the following structure: structure: see text]. Anti-P. alcalifaciens O21 serum cross-reacted with the O-antigen of Proteus vulgaris O47, which contains a GalNAc trisaccharide similar to that present in the P. alcalifaciens O21 O-polysaccharide. |
| Keywords: | Lipopolysaccharide O-Antigen Bacterial polysaccharide structure N-Formyl Providencia alcalifaciens |
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