Taxonomic group: bacteria / Chlamydiae
(Phylum: Chlamydiae)
Associated disease: infection due to Chlamydia psittaci [ICD11:
XN4S7 
];
infection due to Chlamydia trachomatis [ICD11:
XN4Q4 ]
NCBI PubMed ID: 2294050Journal NLM ID: 0246127Publisher: American Society for Microbiology
Institutions: Division of Biochemical Microbiology, Forschungsinstitut Borstel, Federal Republic of Germany
Murine monoclonal and rabbit, murine, and human polyclonal antibodies against chlamydial lipopolysaccharide (LPS) were characterized by the passive hemolysis and passive hemolysis inhibition assays and by absorption experiments with LPSs of Chlamydia psittaci, Chlamydia trachomatis, and a recombinant strain of Salmonella minnesota Re (r595-207) expressing the chlamydia-specific LPS epitope, as well as natural and synthetic partial structures of chlamydial LPS. Eleven monoclonal antibodies of the immunoglobulin M and G classes were characterized as chlamydia-specific by their failure to react with Re-type LPS, binding to a similar epitope for which the trisaccharide α-3-deoxy-D-manno-2-octulosonic acid (KDO)-(2-8)-α-Kdo-(2-4)-α-KDO was an absolute prerequisite. For optimal binding, parts of the lipid A moiety were also involved; however, phosphoryl and ester-linked acyl groups and the reducing glucosamine residue of lipid A were dispensable. A similar antibody specificity was detected in lapine and murine hyperimmune sera after immunization with chlamydia, in addition to those recognizing more complex (e.g., those requiring the presence of phosphoryl residues) and less complex epitopes. Among the latter were those cross-reacting with Re-type LPS, which could be removed by absorption. The titers of different antibody specificities, in particular the ratio of chlamydia-specific to cross-reactive antibodies, present in murine polyclonal antisera depended on the immunization protocol. The preferential formation of chlamydia-specific antibodies was observed after immunization with liposome-incorporated immunogens. Human sera from patients with suspected genital chlamydial infections were also found to contain chlamydia-specific and cross-reactive antibodies, the latter of which could be removed by absorption with Re-type LPS.
Structure type: oligomer
Trivial name: cross-reactive epitope
Compound class: core oligosaccharide, LPS
Contained glycoepitopes: IEDB_130650,IEDB_130657,IEDB_130658,IEDB_130659
Related record ID(s): 2911, 3881, 4145, 116693, 130293, 130294
NCBI Taxonomy refs (TaxIDs): 83554,
813Reference(s) to other database(s): GlycomeDB:
5771
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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