1. New structure for the O-polysaccharide of Providencia alcalifaciens O27 and revised structure for the O-polysaccharide of Providencia stuartii O43
- Author
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Filip V. Toukach, Antoni Rozalski, Marianna Wykrota, Ivan S. Bushmarinov, Yuriy A. Knirel, Olga G. Ovchinnikova, Nina A. Kocharova, and Alexander S. Shashkov
- Subjects
Magnetic Resonance Spectroscopy ,Stereochemistry ,Molecular Sequence Data ,Providencia ,Polysaccharide ,Methylation ,Biochemistry ,Analytical Chemistry ,Carbohydrate Conformation ,Tetrasaccharide ,Providencia alcalifaciens ,chemistry.chemical_classification ,Chromatography ,biology ,Providencia stuartii ,Monosaccharides ,Polysaccharides, Bacterial ,Organic Chemistry ,General Medicine ,Nuclear magnetic resonance spectroscopy ,Carbon-13 NMR ,biology.organism_classification ,Carbohydrate Sequence ,chemistry ,Carbohydrate conformation ,Heteronuclear single quantum coherence spectroscopy - Abstract
The O-polysaccharide was obtained by mild acid degradation of the lipopolysaccharide from Providencia alcalifaciens O27 and studied by sugar and methylation analyses along with (1)H and (13)C NMR spectroscopy, including 2D (1)H,(1)H COSY, TOCSY, ROESY, H-detected (1)H,(13)C HSQC, and HMBC experiments. It was found that the polysaccharide is built up of linear partially O-acetylated tetrasaccharide repeating units and has the following structure: [structure: see text] where Qui4NFo stands for 4-formamido-4,6-dideoxyglucose (4-formamido-4-deoxyquinovose). The O-polysaccharide structure of Providencia stuartii O43 established earlier was revised with respect to the configuration of the constituent 4-amino-4,6-dideoxyhexose (from Rha4N to Qui4N). more...
- Published
- 2007
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