S. flexneri serotype 1a O-polysaccharide (O factor 9-positive)

Term ID

CHEBI:78702

Synonyms

• [2)-alpha-L-Rha(III)3/4Ac-(1->2)-alpha-L-Rha(II)-(1->3)-alpha-L-Rha(I)-(1->3)-[alpha-D-Glc-(1->4)]-beta-D-GlcNAc-(1->]n
• [2)-alpha-L-Rhap(III)3/4Ac-(1->2)-alpha-L-Rhap(II)-(1->3)-alpha-L-Rhap(I)-(1->3)-[alpha-D-Glcp-(1->4)]-beta-D-GlcpNAc-(1->]n

Definition

A polysaccharide derivative comprised of a [2)-α-L-Rhap^III-(1→2)-α-L-Rhap^II-(1→3)-α-L-Rhap^I-(1→3)-β-D-GlcpNAc-(1→] tetrasaccharide repeat modified by the (1→4) linkage of an α-D-glucosyl group to the GlcNAc residue and by addition of an acetyl group to either O-3 or O-4 of many of the Rha^III residues (65% to O-3; 25% to O-4). The structure provided is representative of that in Shigella flexneri serotype 1a and shows the most common repeating unit.

References

• pubmed:19246033
• pubmed:22724405
• pubmed:24671799

Ontology

ChEBI  ( EBI )