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
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PolysacDB ID1990
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe capsular polysaccharide consists of the following residues : -2)-α-D-Galp-(1-->3)-α-D-Glcp-(1-->3)-α-L-Rhap-(1-->4)-D-Rib-ol-(5-P-
BCSDB Structure5205
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodN/A
AntibodiesMab Hyp6BM6
Antibody Type ClassIgM
Assay SystemSandwich ELISA, opsonization assays
Cross ReactivityThis Mab cross-reacted with strain 6A
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityThis Mab had opsonophagocytic activity
Curator IDAA + AS
Date of Curation12-12-2010
ReferencesPMC97888

Record - 2 of 9   [TOP]

PolysacDB ID1991
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe capsular polysaccharide consists of the following residues : -2)-α-D-Galp-(1-->3)-α-D-Glcp-(1-->3)-α-L-Rhap-(1-->4)-D-Rib-ol-(5-P-
BCSDB Structure5205
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodN/A
AntibodiesMab Hyp6BM7
Antibody Type ClassIgM
Assay SystemSandwich ELISA, opsonization assays
Cross ReactivityThis Mab was specific to strain 6B and did not cross-react with strain 6A
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityN/A
Curator IDAA + AS
Date of Curation12-12-2010
ReferencesPMC97888

Record - 3 of 9   [TOP]

PolysacDB ID1992
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe capsular polysaccharide consists of the following residues : -2)-α-D-Galp-(1-->3)-α-D-Glcp-(1-->3)-α-L-Rhap-(1-->4)-D-Rib-ol-(5-P-
BCSDB Structure5205
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodN/A
AntibodiesMab Hyp6BM8
Antibody Type ClassIgM
Assay SystemSandwich ELISA, opsonization assays
Cross ReactivityThis Mab cross-reacted with strain 6A
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityThis Mab had opsonophagocytic activity
Curator IDAA + AS
Date of Curation13-12-2010
ReferencesPMC97888

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PolysacDB ID1993
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe capsular polysaccharide consists of the following residues : -2)-α-D-Galp-(1-->3)-α-D-Glcp-(1-->3)-α-L-Rhap-(1-->4)-D-Rib-ol-(5-P-
BCSDB Structure5205
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodN/A
AntibodiesMab Hyp6BM9
Antibody Type ClassIgM
Assay SystemSandwich ELISA, opsonization assays
Cross ReactivityThis Mab cross-reacted with strain 6A
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityThis Mab had opsonophagocytic activity
Curator IDAA + AS
Date of Curation13-12-2010
ReferencesPMC97888

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PolysacDB ID1994
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe capsular polysaccharide consists of the following residues : -2)-α-D-Galp-(1-->3)-α-D-Glcp-(1-->3)-α-L-Rhap-(1-->4)-D-Rib-ol-(5-P-
BCSDB Structure5205
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodN/A
AntibodiesMab Hyp6BM10
Antibody Type ClassIgM
Assay SystemSandwich ELISA, opsonization assays
Cross ReactivityThis Mab cross-reacted with strain 6A
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityThis Mab had opsonophagocytic activity
Curator IDAA + AS
Date of Curation13-12-2010
ReferencesPMC97888

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PolysacDB ID1999
Carbohydrate NameDisaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe structure of the disaccharide is α-L-Rhap-(1-->4)-D-Rib-ol-[5-->P-->(CH2)3NH2]
BCSDB Structure5205
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodThe saccharides were coupled via the 3-aminopropyl spacer to carrier protein KLH in a stepwise reaction: the amino-terminal groups of the OS fragment and KLH were activated by S acetylation and Br acetylation, respectively, and coupled via a thioether linkage
AntibodiesAntisera
Antibody Type ClassN/A
Assay SystemELISA, phagocytosis assays and protection experiments
Cross ReactivityThis antisera was specific to capsular polysaccharide of strain 6B and did not cross-react with 6A strains
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityThis antisera could passively protect mice against a 6B challenge
Curator IDAA + AS
Date of Curation14-12-2010
ReferencesPMC97953

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PolysacDB ID2000
Carbohydrate NameTrisaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe structure of the trisaccharide is -D-Rib-ol-(5-->P-->2)-α-D-Galp-(1-->3)-α-D-Glcp-[1-->O(CH2)3NH2]
BCSDB Structure5205
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodThe saccharides were coupled via the 3-aminopropyl spacer to carrier protein KLH in a stepwise reaction: the amino-terminal groups of the OS fragment and KLH were activated by S acetylation and Br acetylation, respectively, and coupled via a thioether linkage
AntibodiesAntisera
Antibody Type ClassN/A
Assay SystemELISA, phagocytosis assays and protection experiments
Cross ReactivityThis antisera was specific to capsular polysaccharide of strain 6B and did not cross-react with 6A strains
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityThis antisera could passively protect mice against a 6B challenge
Curator IDAA + AS
Date of Curation14-12-2010
ReferencesPMC97953

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PolysacDB ID2001
Carbohydrate NameTetrasaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameStreptococcus pneumoniae serotype 6B   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe structure of the trisaccharide is α-L-Rhap-(1-->4)-D-Rib-ol-(5-->P-->2)-α-D-Galp-(1-->3)-α-D-Glcp-[1-->O(CH2)3NH2]
BCSDB StructureN/A
Proposed FunctionN/A
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate MethodThe saccharides were coupled via the 3-aminopropyl spacer to carrier protein KLH in a stepwise reaction: the amino-terminal groups of the OS fragment and KLH were activated by S acetylation and Br acetylation, respectively, and coupled via a thioether linkage
AntibodiesAntisera
Antibody Type ClassN/A
Assay SystemELISA, phagocytosis assays and protection experiments
Cross ReactivityThis antisera cross-reacted with capsular polysaccharide of 6A strains
Proposed EpitopeN/A
IEDB EpitopeN/A
Proposed UtilityThis antisera could passively protect mice against a 6B and 6A challenge
Curator IDAA + AS
Date of Curation14-12-2010
ReferencesPMC97953

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PolysacDB ID2605
Carbohydrate NameCapsular polysaccharide   (Drugpedia)
Carbohydrate ClassCapsular polysaccharide
Microbe NameCryptococcus 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 FunctionThe capsular polysaccharide is an important virulence factor
Antigenic NatureGlycoconjugates
Carrier NameKeyhole limpet hemocyanin
Conjugate 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 ClassIgM
Assay SystemELISA and CSA[Cell Slide Agglutination]
Cross ReactivityThis antibody cross-reacted with Serotype A and D serotypes
Proposed EpitopeO-acetylated glucurunoxylomannan
IEDB EpitopeN/A
Proposed UtilityUsed to differentiate various strains of all serotypes
Curator IDAA + AS
Date of Curation16-07-2011
ReferencesPMC170253

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