Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Associated disease: infection due to Shigella dysenteriae [ICD11:
XN285 
]
NCBI PubMed ID: 17726093Publication DOI: 10.1073/pnas.0706969104Journal NLM ID: 7505876Publisher: National Academy of Sciences
Correspondence: pozsgayv
mail.nih.gov; robbinsjo
mail.nih.gov
Institutions: Laboratory of Developmental and Molecular Immunity, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892-2423, USA
Endemic and epidemic shigellosis, an acute invasive disease of the lower intestines, afflicts millions of people worldwide with an estimated one million fatalities per annum at a low infectious dose. Our approach to vaccine development against Shigella is based on the hypothesis that serum IgG antibodies to the O-specific polysaccharide (O-SP) domains of the LPS of these organisms confer protection to infection. The synthetic oligosaccharides corresponding to the tetrasaccharide repeating unit of the O-SP of Shigella dysenteriae type 1 covalently linked to human serum albumin elicited O-SP-specific IgG in mice. The antibody levels were a function of both the saccharide chain length and their loading on the protein. These synthetic saccharide conjugates elicited significantly higher levels of IgG anti O-SP than conjugates prepared with the O-SP from the bacteria. Here, we evaluated the influence of the nonreducing terminal monosaccharide on the serum antibody response. To this end, we prepared synthetic oligosaccharides comprising hexa- to tridecasaccharide fragments of the native O-SP, having one of the four monosaccharide residues that constitute the repeating unit at their termini and bound them to BSA by a single-point attachment. The conjugates contained an average of 19 saccharide chains per BSA. The synthetic oligosaccharides inhibited the binding of serum raised against whole bacteria to its LPS to a similar extent but lower than the native O-SP. The highest anti-LPS levels were elicited by conjugates having N-acetylglucosamine (10-mer) or galactose residues (7- and 11-mers) at their nonreducing termini
O-specific polysaccharide, oligosaccharide synthesis, Dysentery, vaccine, Shigella dysenteriae, conjugate, bioconjugation
Structure type: polymer chemical repeating unit
Location inside paper: p.14478
Compound class: O-polysaccharide, O-antigen
Contained glycoepitopes: IEDB_125611,IEDB_130668,IEDB_130669,IEDB_136105,IEDB_136906,IEDB_137340,IEDB_137472,IEDB_137483,IEDB_141794,IEDB_141807,IEDB_151528,IEDB_151531,IEDB_190606,IEDB_225177,IEDB_885823,SB_7
Methods: 13C NMR, 1H NMR, MALDI-TOF MS, serological methods
Biological activity: serological data, biological activity data
Synthetic data: chemical
Comments, role: published polymerization frame was shifted for conformity with other records.
3D data: molecular modeling
Related record ID(s): 21725, 21726, 21727, 21728, 21729, 21730, 21731, 21733, 21734, 22417, 22420
NCBI Taxonomy refs (TaxIDs): 984897Reference(s) to other database(s): GTC:G76746EO, GlycomeDB:
6223
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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