Taxonomic group: bacteria / Proteobacteria
(Phylum: Proteobacteria)
Associated disease: infection due to Escherichia coli [ICD11:
XN6P4 
]
NCBI PubMed ID: 2461792Publication DOI: 10.1139/m88-204Journal NLM ID: 0372707Publisher: National Research Council of Canada
Institutions: Department of Microbiology, University of Guelph, Ont., Canada
Monoclonal antibodies were produced against the capsular antigen of Escherichia coli serotype K(A)30, using a mouse hybridoma system. The antibodies also recognised the chemically identical capsular polysaccharide produced by Klebsiella K20. Chemical modification of the K30 polysaccharide indicated that the glucuronic acid residues found in the E. coli K30 capsular antigen were important in the epitope recognised by these antibodies. Use of the antibodies as molecular probes revealed the presence of two discrete forms of the K30 antigen. One form was comprised of high molecular weight polysaccharide, present as a surface capsular layer. The second form of the antigen was of low molecular weight and was associated with lipopolysaccharide fractions from cell surface polysaccharide extracts. Separation of lipopolysaccharide fractions using gel chromatography in the presence of detergent showed that the low molecular weight K-antigenic fraction comigrated with a lipopolysaccharide lipid A core fraction present in encapsulated E. coli K30 bacteria but absent in acapsular mutants.
Structure type: oligomer
Compound class: K-antigen
Contained glycoepitopes: IEDB_130701,IEDB_136044,IEDB_136906,IEDB_137472,IEDB_141794,IEDB_142488,IEDB_144983,IEDB_146664,IEDB_151528,IEDB_152206,IEDB_190606,IEDB_983930,IEDB_983931,SB_165,SB_166,SB_187,SB_192,SB_195,SB_44,SB_67,SB_7,SB_72,SB_88
Methods: gel filtration, SDS-PAGE, ELISA, electrophoresis, bacterial agglutinations
NCBI Taxonomy refs (TaxIDs): 562Reference(s) to other database(s): GTC:G80186AD, GlycomeDB:
4677
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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