Structure of the O-polysaccharide of Salmonella enterica O41

Abstract

An O-polysaccharide was obtained by mild acid degradation of the lipopolysaccharide of Salmonella enterica O41, and the following structure of the O-unit was determined by chemical analyses along with 1D and 2D 1H and 13C NMR spectroscopy: →2)-β- d-Man p-(1→4)-α- d-Glc p-(1→3)-α- l-Qui pNAc-(1→3)-α- d-Glc pNAc-(1→ where QuiNAc stands for 2-acetamido-2,6-dideoxyglucose. The structure established is in agreement with the O-antigen gene cluster of S. enterica O41 and tentative assignment of the gene functions reported earlier.