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 ID2605
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
MicrobeCryptococcus neoformans Serotype D   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe capsular polysaccharide has a linear α-(1-->3)-linked mannose backbone that is substituted with nonreducing D-xylosyl and D-glucuronosyl acid groups. The mannose backbone is partially O-acetylated
BCSDB Structure136943
Proposed functionsThe capsular polysaccharide is an important virulence factor
Antigenic Nature used to produce antibodiesGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugation MethodForty milligrams of crude polysaccharide was dissolved in 4 ml of physiological saline solution (PSS). One milliliter of 1% cyanuric chloride in dimethylformamide was added to the polysaccharide solution and stirred for 1 h at 48°C. KLH in PSS (100 mg/2ml) was added and stirred for 1 h at 258°C, and the solution was then incubated at 48C for 18 h. The solution was dialyzed against water for 30 h and centrifuged. The protein concentration in the supernatant was adjusted to 2 mg/ml, 1/9 volume of 10% aluminum potassium sulfate solution was added, and the pH was adjusted to 6.5 with 10% sodium carbonate. The precipitated antigen was removed by centrifugation and resuspended in PSS
AntibodiesMab CRND8
Antibody type and classIgM
Assay SystemELISA and CSA[Cell Slide Agglutination]
Cross-reactivityThis antibody cross-reacted with Serotype A and D serotypes
Proposed epitopesO-acetylated glucurunoxylomannan
IEDB EpitopeN/A
Proposed UtilityUsed to differentiate various strains of all serotypes
Curator IDAA + AS
Date of Curation16-07-2011
ReferencesPMC170253


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