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 ID2265
Carbohydrate NameY O-polysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
Microbe NameShigella flexneri   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe O-LPS consists of a tetrasaccharide repeating unit α-L-Rhap-(1-->2)-α-L-Rhap(1-->3)- . This tetrasaccharide is polymerized and joined by β-1,2 linkages between N-acetyl-D-glucosamine and L-rhamnosyl to form the O-polysaccharide chain
BCSDB StructureN/A
Proposed FunctionN/A
Antigenic NatureHeat-killed S. flexnerf bacteria serotype Y
Carrier NameNil
Conjugate MethodNil
AntibodiesMab MASF Y-1
Antibody Type ClassN/A
Assay SystemELISA, FARR assay
Cross ReactivityThis Mab bound only to LPS of serotypes 4a and Y. In the glycoconjugate ELISA, MASF Y-1 bound only to the octasaccharide-(cdabcdab') and the decasaccharide-(abcdabcdab') BSA conjugate
Proposed EpitopeThis Mab bound to intrachain determinants
IEDB Epitope76764
Proposed UtilityThis Mab would help in the delineation of the antigenic stucture of Y O polysaccharide
Curator IDAA + AS
Date of Curation15-03-2011
References2438343

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PolysacDB ID2266
Carbohydrate NameY O-polysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
Microbe NameShigella flexneri   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe O-LPS consists of a tetrasaccharide repeating unit α-L-Rhap-(1-->2)-α-L-Rhap(1-->3)- . This tetrasaccharide is polymerized and joined by β-1,2 linkages between N-acetyl-D-glucosamine and L-rhamnosyl to form the O-polysaccharide chain
BCSDB StructureN/A
Proposed FunctionN/A
Antigenic NatureHeat-killed S. flexnerf bacteria serotype Y
Carrier NameNil
Conjugate MethodNil
AntibodiesMab MASF Y-2
Antibody Type ClassN/A
Assay SystemELISA, FARR assay
Cross ReactivityMASF Y-2 bound exclusively to LPS of serotype Y. In the glycoconjugate ELISA. these antibodies bound only to the octa- and decasaccharide-BSA antigens
Proposed EpitopeThis Mab bound to intrachain determinants
IEDB Epitope76764
Proposed UtilityThis Mab would help in the delineation of the antigenic stucture of Y O polysaccharide
Curator IDAA + AS
Date of Curation15-03-2011
References2438343

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PolysacDB ID2267
Carbohydrate NameY O-polysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
Microbe NameShigella flexneri   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe O-LPS consists of a tetrasaccharide repeating unit α-L-Rhap-(1-->2)-α-L-Rhap(1-->3)- . This tetrasaccharide is polymerized and joined by β-1,2 linkages between N-acetyl-D-glucosamine and L-rhamnosyl to form the O-polysaccharide chain
BCSDB StructureN/A
Proposed FunctionN/A
Antigenic NatureHeat-killed S. flexnerf bacteria serotype Y
Carrier NameNil
Conjugate MethodNil
AntibodiesMab MASF Y-3
Antibody Type ClassN/A
Assay SystemELISA, FARR assay
Cross ReactivityMASF Y-3 bound to LPS of serotypes 2a. 3b. 4b. And Y
Proposed EpitopeThe terminal nonreducing end of the O-polysaccharide complementary to the tetrasaccharide repeating unit
IEDB Epitope76696
Proposed UtilityThis Mab would help in the delineation of the antigenic stucture of Y O polysaccharide
Curator IDAA + AS
Date of Curation15-03-2011
References2438343

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PolysacDB ID2268
Carbohydrate NameY O-polysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
Microbe NameShigella flexneri   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe O-LPS consists of a tetrasaccharide repeating unit α-L-Rhap-(1-->2)-α-L-Rhap(1-->3)- . This tetrasaccharide is polymerized and joined by β-1,2 linkages between N-acetyl-D-glucosamine and L-rhamnosyl to form the O-polysaccharide chain
BCSDB StructureN/A
Proposed FunctionN/A
Antigenic NatureHeat-killed S. flexnerf bacteria serotype Y
Carrier NameNil
Conjugate MethodNil
AntibodiesMab MASF Y-4
Antibody Type ClassN/A
Assay SystemELISA, FARR assay
Cross ReactivityMASF Y-4 bound to LPS of serotypes 2a. 3b, 4a, 4b, 5a, and Y
Proposed EpitopeThe terminal nonreducing end of the O-polysaccharide complementary to the tetrasaccharide repeating unit
IEDB Epitope76696
Proposed UtilityThis Mab would help in the delineation of the antigenic stucture of Y O polysaccharide
Curator IDAA + AS
Date of Curation15-03-2011
References2438343

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PolysacDB ID2269
Carbohydrate NameY O-polysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
Microbe NameShigella flexneri   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe O-LPS consists of a tetrasaccharide repeating unit α-L-Rhap-(1-->2)-α-L-Rhap(1-->3)- . This tetrasaccharide is polymerized and joined by β-1,2 linkages between N-acetyl-D-glucosamine and L-rhamnosyl to form the O-polysaccharide chain
BCSDB StructureN/A
Proposed FunctionN/A
Antigenic NatureHeat-killed S. flexnerf bacteria serotype Y
Carrier NameNil
Conjugate MethodNil
AntibodiesMab MASF Y-5
Antibody Type ClassN/A
Assay SystemELISA, FARR assay
Cross ReactivityThe rat Mab (MASF Y-5) bound LPS of serotypes 2a, 3b, 4a, and Y, all carrying the group antigen 3,4. It bound to the tetrasaccharides-( abcd), (bcda), [cdab'), (dabc), the octasaccharide-(cdabcdab'), and the decasaccharide-BSA (abcdabcdab ') glycoconjugates
Proposed EpitopeThis Mab bound to intrachain determinants
IEDB Epitope76764
Proposed UtilityThis Mab would help in the delineation of the antigenic stucture of Y O polysaccharide
Curator IDAA + AS
Date of Curation15-03-2011
References2438343

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PolysacDB ID2270
Carbohydrate NameY O-polysaccharide   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
Microbe NameShigella flexneri   (NCBI Taxonomy)   (Drugpedia)
Basic StructureThe O-LPS consists of a tetrasaccharide repeating unit α-L-Rhap-(1-->2)-α-L-Rhap(1-->3)- . This tetrasaccharide is polymerized and joined by β-1,2 linkages between N-acetyl-D-glucosamine and L-rhamnosyl to form the O-polysaccharide chain
BCSDB StructureN/A
Proposed FunctionN/A
Antigenic NatureHeat-killed S. flexnerf bacteria serotype Y
Carrier NameNil
Conjugate MethodNil
AntibodiesAntisera
Antibody Type ClassN/A
Assay SystemELISA, FARR assay
Cross ReactivityThe polyclonal rabbit anti-group antigen 3.4 antibodies reacted with the lb, 2a, 3b, 4a. 4b, and Y LPS. They did not bind to1a and 5a. In glycoconjugate ELISA's it bound to all saccharides especially abcd- and decasaccharide- BSA antigens
Proposed EpitopeAntigen 3,4 seemed to be the epitope
IEDB Epitope76696
Proposed UtilityThis Mab would help in the delineation of the antigenic stucture of Y O polysaccharide
Curator IDAA + AS
Date of Curation16-03-2011
References2438343

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