Journal
CARBOHYDRATE RESEARCH
Volume 338, Issue 23, Pages 2751-2756Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2003.05.001
Keywords
Acinetobacter baumannii; lipopolysaccharide; O-specific polysaccharide; structural analysis; NMR spectroscopy
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Extraction of dry bacteria of Acinetobacter baumannii strain 24 by phenol-water yielded a lipopolysaccharide (LPS) that was studied by serological methods and fatty acid analysis. After immunisation of BALB/c mice with this strain, monoclonal antibody S48-3-13 (IgG(3) isotype) was obtained, which reacted with the LPS in western blot and characterized it as S-form LPS. Degradation of the LPS in aqueous 1% acetic acid followed by GPC gave the O-antigenic polysaccharide, whose structure was determined by compositional analyses and NMR spectroscopy of the polysaccharide and O-deacylated polysaccharide as [GRAPHICS] where QuiN4N is 2,4-diamino-2,4,6-trideoxyglucose and GalNAcA 2-acetamido-2-deoxygalacturonic acid. The amino group at C-4 of the QuipN4N residues is acetylated in about 2/3 of LPS molecules and (S)-3-hydroxybutyrylated in the rest. (C) 2003 Elsevier Ltd. All rights reserved.
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