PolysacDB: A comprehensive database of microbial polysaccharide antigens and their antibodies

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Citation: Aithal A, Sharma A, Joshi S, Raghava GPS, Varshney GC (2012) PolysacDB: A Database of Microbial Polysaccharide Antigens and Their Antibodies. PLoS ONE 7(4): e34613. doi:10.1371/journal.pone.0034613
Total Entries - 1

Entry No. - 1   [TOP]
PolysacDB ID2423
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
MicrobeStreptococcus Group B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe structure of type III polysaccharide is as follows : -3-β-D-Galp-(1-->4)-β-D-Glcp-(1-->6)-β-D-GlcNAcp-(1--> along with the fact that the carboxyl of the -D-NeuNAcp was linked to the O-3 of the adjacent D-galactose to form the type-specific site
BCSDB StructureN/A
Proposed functionsThe property of invasiveness is related to the anti-phagocytic properties conferred to Group B Streptococcus by its capsular polysaccharide
Antigenic Nature used to produce antibodiesWhole cells
Carrier NameNil
Conjugation MethodNil
AntibodiesMab GBS II/4-1OBA9
Antibody type and classN/A
Assay SystemCounterimmunoelectrophoresis, Radioactive binding assay, Ouchterlony double-diffusion, Latex particle agglutination tests
Cross-reactivityA9 antibody cross-reacted with group B antigen in gel diffusion reactions with extracts of Lancefield group A, B, C, D, F, and G streptococci
Proposed epitopesRhamnose is not an immunodominant determinant contrasts with polyclonal rabbit antiserum to this antigen
IEDB EpitopeN/A
Proposed UtilityThis Mab was a highly sensitive reagent in detecting soluble group B antigen by counterimmunoelectrophoresis. A9 antibody-coated latex particles were compared with a commercially available polyclonal latex agglutination reagent and shown to be equally sensitive and specific in the detection of soluble group B antigen in urine and cerebrospinal fluid from patients with GBS infections
Curator IDAA + AS
Date of Curation08-05-2011
ReferencesPMC272311


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