Rozalski A, Brade L, Kosma P, Appelmelk BJ, Krogmann C, Brade H Epitope specificities of murine monoclonal and rabbit polyclonal antibodies against enterobacterial lipopolysaccharides of the Re chemotype Infection and Immunity57 (1989)
2645-2652
NCBI PubMed ID:2474499 Journal NLM ID:0246127 Publisher: American Society for Microbiology Institutions: Division of Biochemical Microbiology, Institut für Experimentelle Biologie und Medizin, Borstel, Federal Republic of Germany
Murine monoclonal and rabbit polyclonal antibodies raised against the lipopolysaccharides (LPS) of Re mutants of Salmonella minnesota, Proteus mirabilis, and Escherichia coli were serologically characterized. Using natural Re LPS and natural and synthetic partial structures thereof, representing the 3-deoxy-D-manno-2-octulosonic acid (KDO) or lipid A region or both, the epitope specificities of four monoclonal antibodies were defined. Clones 20 (immunoglobulin M [IgM]) and 25 (IgG3) recognize a terminal alpha-pyranosidically linked KDO monosaccharide residue and the α-2,4-linked KDO disaccharide, respectively, as the immunodominant group. Therefore, these two antibodies are core antibodies which do not require the presence of lipid A constituents for binding. The minimal structure enabling binding of clone 17 (IgG2b) is a pseudotetrasaccharide of the sequence α-Kdo-(2→4)-α-Kdo-(2→6)-β-glucosamine-(1→6)- glucosaminitol with two amide-linked 3-hydroxytetradecanoic acid residues. The smallest structure with which clone 22 (IgG3) reacted was de-O-acylated Re LPS. Therefore, clones 17 and 22 are LPS antibodies requiring both the lipid A and the KDO region for binding. Phosphoryl residues of the lipid A moiety in Re LPS are dispensable for the reaction with clone 17, whereas they are necessary for that with clone 22. These four different antibody types were also detected in polyclonal rabbit antisera and could be distinguished from each other by absorption experiments. It was found that type 20 and 25 antibodies either were not present or were present only in small amounts and that the majority of the antibodies were of types 17 and 22. From these data, we conclude that the immunodominant structures of Re LPS comprise both the KDO and lipid A domains.
Methods: serological methods Biological activity: serological activity Biosynthesis and genetic data: genetic data
Related record ID(s): 130235, 130236 NCBI Taxonomy refs (TaxIDs):70803, 584, 562 Reference(s) to other database(s): CCSD:4178, CBank-STR:14352 Show glycosyltransferases
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