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 ID2316
Carbohydrate NameLipopolysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
MicrobeShigella flexneri serotype 2a   (NCBI Taxonomy)   (Drugpedia)
Basic StructureChemically, the O-antigen is a polysaccharide chain of variable length, built up by repetitive sequences of tetra- to hexasaccharides. It consists of a basic tetrasaccharide repeating unit consisting of three rhamnoses and one N-acetylglucosamine was common to all S. flexneri strains (except serotype 17): -2)-α-L-Rhap-(1-->2)-α-L-Rhap-(1-->3)-α-L-Rhap-(1-->3)-β-D-GlcpNAc-(1-->. It is characterized by a branching glucose residue linked to the third rhamnose.
BCSDB Structure9558
Proposed functionsLPS plays an important virulence role based on its antiphagocytic and endotoxic properties
Antigenic Nature used to produce antibodiesHeat killed cells
Carrier NameNil
Conjugation MethodNil
AntibodiesMab MASF(II:3,4)-2
Antibody type and classIgG
Assay SystemELISA, agglutination tests
Cross-reactivityThis Mab was specific to 2a LPS
Proposed epitopesThis Mab apparently interact with the α-D-glucose p(1-->4)-α-L-rhamnosyl pIII epitope
IEDB Epitope76668
Proposed UtilityThis Mab can be used for detection and identification of shigella flexneri species
Curator IDAA + AS
Date of Curation31-03-2011
ReferencesPMC272864


Department of Computational Biology, Indraprastha Institute of Information Technology, Sec - 39A, New Delhi, India - 110020