Structure of the O-specific polysaccharide from the lipopolysaccharide of Serratia marcescens O8

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Abstract
Structural studies have been carried out on the O-specific polysaccharide from the lipopolysaccharide of the reference strain (CDC 1604-55) for serogroup 08 of Serratia marcescens. The polymer has a branched, tetrasaccharide repeating unit of D-galactose (Gal), D-glucose (Glc), and 2-acetamido-2-deoxy-D-glucose (GlcNAc) with the following structure: .**GRAPHIC**. The anomeric configuration assigned to the glucose residue differs from that (.beta.) previously proposed [Tarcsay, L., Wang, C.S., Li, S.-C. and Alaupovic, P. (1973) Biochemistry 12, 1948-1955]. The structure of the 08 polymer is identical with that of one of two polymers present in the cell envelope of a strain (CDC 1783-57) of S. marcescens 014.