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 ID1354
Carbohydrate NameTetrasaccharide of 3-deoxy-α-d-manno-oct-2-ulopyranosonic acid (Kdo)   (Drugpedia)
Carbohydrate ClassLipopolysaccharide
Microbe NameChlamydophila psittaci   (NCBI Taxonomy)   (Drugpedia)
Basic StructureConsists of repeating units of tetrasaccharide of 3-deoxy--D-manno-oct-2 ulopyranosonic acid (Kdo) residues
BCSDB StructureN/A
Proposed FunctionLPS represents one of the major surface antigens of this microorganism
Antigenic NatureGlycoconjugates
Carrier NameBovine serum albumin
Conjugate MethodThe allyl glycosides R-OCH2-CH=CH2 were conjugated with cysteamine yielding R-O(CH2)3-S-(CH2)2-NH3+, which were activated with thiophosgene into the isothiocyanate derivatives R O(CH2)3-S-(CH2)2-N=C=S and then conjugated to BSA yielding R-O(CH2)3-S-(CH2)2-NH-CS-NH-BSA, wherein R represents the glycosyl residue
AntibodiesMab S69-4
Antibody Type ClassIgG1
Assay SystemIFT assay, ELISA
Cross ReactivityThis antibody was specific only to C. psittaci
Proposed EpitopeThe epitope consists of a branched Kdo(2N/A8)[Kdo(2N/A4)] Kdo(2N/A4)Kdo(2N/A4) tetrasaccharide that is specific to Chlamydia psittaci
IEDB Epitope76909
Proposed UtilityThis Mab may provide insight into the molecular details of the interaction of these antibodies with acidic Kdo containing epitopes. Mab S69-4 can be used in immunohistology to reliably identify C. psittaci at the species level
Curator IDAA + AS
Date of Curation26-06-2010
References16282606

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