The complete structure of the O-specific polysaccharide of the lipopolysaccharide isolated from the cultivated mushrooms pathogen Pseudomonas tolaasii is described. The structural determination, achieved by chemical and spectroscopical analyses, indicates a novel tetrasaccharide repeating unit built up of two units of 2-acetamido-2,6-di-deoxy-glucopyranose (quinovosamine, QuipNAc) and two units of 2- acetamido-2-deoxy-gulopyranuronamide (GulpNAcAN), one of which is acetylated at C-3 position:
Lipopolysaccharide, structure, tetrasaccharide, structural, polysaccharide, repeating unit, Pseudomonas, chain, determination, structural determination, bacteria, O-specific, O-specific polysaccharide, chemical, position, pathogen, acetylated, mushroom, pathogenic bacteria, mushrooms, pathogenic, quinovosamine
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