Structure of the O-specific polysaccharide from the lipopolysaccharide of Aeromonas sobria strain Pt312

- The OPS from the opportunistic fish pathogen Aeromonas sobria is elucidated.
- The OPS from Aeromonas sobria Pt312 has a disaccharide repeating unit.
- The O-antigen is composed of one α-GlcpNAc and one α-Rhap, residues.
- Rhap is non-stoichiometrically acetylated at positions O-2 and O-3.
- Studies of Aeromonas O-antigens advance the identification of aquatic bacteria.