NDLI: Chemical Structure, Conjugation, and Cross-Reactivity of Bacillus pumilus Sh18 Cell Wall Polysaccharide

Content Provider	PubMed Central
Author	Joanna, Kubler-kielb Coxon, Bruce Schneerson, Rachel
Copyright Year	2004
Abstract	Bacillus pumilus strain Sh18 cell wall polysaccharide (CWP), cross-reactive with the capsular polysaccharide of Haemophilus influenzae type b, was purified and its chemical structure was elucidated using fast atom bombardment mass spectrometry, nuclear magnetic resonance techniques, and sugar-specific degradation procedures. Two major structures, 1,5-poly(ribitol phosphate) and 1,3-poly(glycerol phosphate), with the latter partially substituted by 2-acetamido-2-deoxy-α-galactopyranose (13%) and 2-acetamido-2-deoxy-α-glucopyranose (6%) on position O-2, were found. A minor component was established to be a polymer of →3-O-(2-acetamido-2-deoxy-β-glucopyranosyl)-1→4-ribitol-1-OPO3→. The ratios of the three components were 56, 34, and 10 mol%, respectively. The Sh18 CWP was covalently bound to carrier proteins, and the immunogenicity of the resulting conjugates was evaluated in mice. Two methods of conjugation were compared: (i) binding of 1-cyano-4-dimethylaminopyridinium tetrafluoroborate-activated hydroxyl groups of the CWP to adipic acid dihydrazide (ADH)-derivatized protein, and (ii) binding of the carbodiimide-activated terminal phosphate group of the CWP to ADH-derivatized protein. The conjugate-induced antibodies reacted in an enzyme-linked immunosorbent assay with the homologous polysaccharide and with a number of other bacterial polysaccharides containing ribitol and glycerol phosphates, including H. influenzae types a and b and strains of Staphylococcus aureus and Staphylococcus epidermidis.
Related Links	http://dx.doi.org/10.1128/jb.186.20.6891-6901.2004
Ending Page	6901
Page Count	11
Starting Page	6891
File Format	PDF
ISSN	00219193
e-ISSN	10985530
Journal	Journal of Bacteriology
Issue Number	20
Volume Number	186
Language	English
Publisher	American Society for Microbiology
Publisher Date	2004-10-15
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Molecular Biology Microbiology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Molecular Biology Microbiology

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