Abstract
The O-specific polysaccharide (O-antigen) of Escherichia coli O133 was obtained by mild acid hydrolysis of the lipopolysaccharide of E. coli O133. The structure of the hexasaccharide repeating unit of the polysaccharide was elucidated by 1H and 13C NMR spectroscopy, including a two-dimensional 1H–1H ROESY experiment: [Display omitted] Functions of genes in the O-antigen gene cluster were putatively identified by comparison with sequences in the available databases and, particularly, an encoded predicted multifunctional glycosyltransferase was assigned to three α-l-rhamnosidic linkages.
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