| PolysacDB ID | 2323 |
| Carbohydrate Name | O-polysaccharide (Drugpedia) |
| Carbohydrate Class | Lipopolysaccharide |
| Microbe | Shigella flexneri (NCBI Taxonomy) (Drugpedia) |
| Basic Structure | Chemically, the O-antigen is a polysaccharide chain of variable length, built up by repetitive sequences of tetra- to hexasaccharides. It consists of a basic tetrasaccharide repeating unit consisting of three rhamnoses and one N-acetylglucosamine was common to all S. flexneri strains (except serotype 17): -2)-α-L-Rhap-(1-->2)-α-L-Rhap-(1-->3)-α-L-Rhap-(1-->3)-β-D-GlcpNAc-(1-->
|
| BCSDB Structure | 3707
|
| Proposed functions | N/A |
| Antigenic Nature used to produce antibodies | Heat killed cells |
| Carrier Name | Nil |
| Conjugation Method | Nil |
| Antibodies | Antisera |
| Antibody type and class | N/A |
| Assay System | ELISA |
| Cross-reactivity | The highest titers seen were against serotype 3a and 3b LPSs |
| Proposed epitopes | In S. flexneri serotype 3a and 3b LPSs there is no structural feature to which the type III antigen epitope can be assigned. Instead, the serotype specificity is a consequence of the addition of two group antigen epitopes to the basic structure in serotype 3a (7,8 and 6 epitopes) and of one group antigen epitope to the basic structure in serotype 3b (6 epitope). The α-D-glucose-(1-->3)-α-L-rhamnose was assigned as the determinant for group 7,8 antigen, and the 2-O-acetyl-α-L-rhamnose III structure was assigned as the determinant for group 6 antigen |
| IEDB Epitope | 76815 |
| Proposed Utility | N/A |
| Curator ID | AA + AS |
| Date of Curation | 02-04-2011
|
| References | PMC96386 |