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 - 2

Entry No. - 1   [TOP]
PolysacDB ID1013
Carbohydrate NameGlucurunoxylomannan   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
MicrobeCryptococcus neoformans serotype A   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe GXM backbone consists of a linear α(1-->3)-linked mannan substituted at 2-O positions by single residues of either xylose or glucuronic acid
BCSDB Structure116826
Proposed functionsAntiphagocytic ; an important virulence factor
Antigenic Nature used to produce antibodiesPure Capsular polysaccharide
Carrier NameN/A
Conjugation MethodN/A
AntibodiesMab E1
Antibody type and classIgG1
Assay SystemAgglutination with C. neoformans serotype A cells, Radial immunodiffusion, Indirect Immunofluorescence,, ELISA, Competitive binding assays
Cross-reactivityThis antibody was highly specific to serotype A, low levels of cross reactivity to serotypes B and D. Among the other yeasts tested, a cross-reaction was only detected with Trichosporon beigelii.
Proposed epitopesN\A
IEDB Epitope115576
Proposed UtilityCould be useful for fundamental studies on the glucuronoxylomannan structure, as well as for clinical applications such as serotyping and possibly the serological diagnosis of cryptococcosis
Curator IDAA + AS
Date of Curation04-01-2010
ReferencesPMC260404


Entry No. - 2   [TOP]
PolysacDB ID2210
Carbohydrate NameLipopolysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
MicrobeSalmonella minnesota Re chemotype 595   (NCBI Taxonomy)   (Drugpedia)
Basic StructureLPS is a complex macromolecule composed of the biologically active lipid A moiety, covalently attached core oligosaccharide, and distally linked polysaccharide O-side chain. The core oligosaccharide part consists of the following residues : α-Kdop-(2-8)-α-Kdop-(2-->4)-Kdo
BCSDB StructureN/A
Proposed functionsLPS plays an important virulence role based on its antiphagocytic and endotoxic properties
Antigenic Nature used to produce antibodiesWhole cells
Carrier NameNil
Conjugation MethodNil
AntibodiesMab E1
Antibody type and classIgG3
Assay SystemDirect and inhibition enzyme immunoassays
Cross-reactivityMAb E1 reacted exclusively with those of Re-chemotype
Proposed epitopesIt recognized α-Kdo- monosaccharide and disaccharide structures present as non-reducing side chains in various Re-type LPSs and synthetic antigens
IEDB EpitopeN/A
Proposed UtilityThis Mab can be used for identification of Salmonella strains having the Re chemotype
Curator IDAA + AS
Date of Curation04-03-2011
References1294455


Bioinformatics Centre, Institute of Microbial Technology, Sec - 39A, Chandigarh, India - 160036