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Structural analysis of the core oligosaccharide from Pasteurella multocida strain X73
Frank St Michael1, Jianjun Li, Andrew D Cox
1Institute for Biological Sciences, 100 Sussex Drive, National Research Council, Ottawa, ON, Canada K1A 0R6.
Carbohydrate Research
|March 31, 2005
Summary
The core oligosaccharide structure of Pasteurella multocida strain X73 lipopolysaccharide was determined. It is similar to strain VP161 but features unique phosphoethanolamine substitutions on terminal galactose residues.
Area of Science:
- Microbiology
- Carbohydrate Chemistry
- Structural Biology
Background:
- Lipopolysaccharides (LPS) are crucial components of Gram-negative bacteria.
- Understanding LPS structure is vital for vaccine development and diagnostics.
- Pasteurella multocida causes significant diseases in animals and humans.
Purpose of the Study:
- To elucidate the detailed structure of the core oligosaccharide from Pasteurella multocida strain X73 LPS.
- To compare the elucidated structure with that of other P. multocida strains.
Main Methods:
- Lipopolysaccharide isolation and purification.
- Degradative procedures to obtain the core oligosaccharide.
- Monosaccharide analysis, methylation analysis, Nuclear Magnetic Resonance (NMR) spectroscopy, and Mass Spectrometry (MS) for structural determination.
Main Results:
- The core oligosaccharide structure of P. multocida X73 LPS was elucidated.
- The structure shares similarities with P. multocida strain VP161 oligosaccharide.
- Unique symmetrical substitutions of phosphoethanolamine (PEtn) moieties were identified on terminal galactose residues.
Conclusions:
- The detailed structural characterization of P. multocida X73 LPS core oligosaccharide provides valuable insights.
- The identified structural variations may have implications for P. multocida strain differentiation and host-pathogen interactions.
- This structural information can aid in the development of targeted therapeutics or vaccines.