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Structural analysis of the O-specific polysaccharide from the lipopolysaccharide ofAeromonas veroniibv. sobria strain K49

Authors
Journal
Carbohydrate Research
0008-6215
Publisher
Elsevier
Publication Date
Volume
353
Identifiers
DOI: 10.1016/j.carres.2012.03.007
Keywords
  • Aeromonas Veronii
  • Fish Pathogen
  • O-Specific Polysaccharide
  • Lipopolysaccharide

Abstract

Abstract The O-specific polysaccharide obtained by mild-acid degradation of the lipopolysaccharide from Aeromonas veronii bv. sobria strain K49 was studied by sugar and methylation analyses along with 1H and 13C NMR spectroscopy. The sequence of the sugar residues was determined using 1H,1H NOESY and 1H,13C HMBC experiments. The O-specific polysaccharide was found to be a high molecular mass polysaccharide composed of repeating units of the structure: →2)-β-d-Quip3NAc-(1→3)-α-l-Rhap-(1→3)-α-l-Rhap-(1→2)-α-l-Rhap-(1→3)-α-d-FucpNAc-(1→ ESI MS confirmed the pentasaccharide structure of the repeating unit, as the molecular mass peaks seen in the spectrum differed by 812.34u, a value corresponding to the calculated molecular mass of the O-unit.

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