A polysaccharide containing D-galactose, 2-deoxy-2-N-acetylamino-D-galactose and 3,6-dideoxy-3-N-(D-3-hydroxybutyryl)amino-D-galactose, probably corresponding to the lipopolysaccharide side chain, was obtained from an aqueous phenol extract of isolated cell walls from Acinetobacter baumannii strain O2. By means of NMR studies and chemical degradations, the repeating unit of the polymer was identified as a branched hexasaccharide of the structure shown, where Fuc3N represents 3-amino-3,6-dideoxygalactose and R represents D-3-hydroxybutyryl. Serological tests indicated that the polymer corresponded to the O2 antigen.

Lipopolysaccharide, Acinetobacter, Acinetobacter baumannii, O-specific polysaccharide, 6-dideoxy-D-galactose, 3-amino-3, 3-hydroxybutyric acid

• Compound ID: 729
  

  R-3HOBut-(1-3)-b-D-Fucp3N-(1-3)-a-D-GalpNAc-(1-3)-b-D-GalpNAc-(1-3)-+ | -3)-b-D-GalpNAc-(1-4)-a-D-Galp-(1-6)-b-D-Galp-(1-

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  Structure type: polymer chemical repeating unit
  Compound class: CPS, O-polysaccharide, O-antigen
  
   
  
  Acinetobacter baumannii O2
  CSDB ID 484 (all data & tools)