Structure of the O-antigen of Budvicia aquatica 20186, a new bacterial polysaccharide that contains 3,6-dideoxy-4-C-[(S)-1-hydroxyethyl]-d-xylo-hexose (yersiniose A)

The following structure of the O-specific polysaccharide (O-antigen) of Budvicia aquatica 20186 was elucidated by sugar analysis along with 1D and 2D 1H and 13C NMR spectroscopy: →4)-α-l-Rhap-(1→3)-α-d-Galp-(1→2)-α-Yerp-(1→3)-β-d-GalpNAc-(1→ where Yer stands for 3,6-dideoxy-4-C-[(S)-1-hydroxyethyl]-d-xylo-hexose (yersiniose A).