Structure of the O-specific polysaccharide chain of the lipopolysaccharide of Bordetella hinzii

The lipopolysaccharide of Bordetella hinzii was analyzed after various chemical degradations by NMR spectroscopy and MALDI mass spectrometry, and the following structure of the polysaccharide chain was determined:4-O-Me-α-GalpNAc3NAcAN-(1→[→4)-β-GlcpNAc3NAcAN-(1→4)-β-GlcpNAc3NAcAN-(1→4)-α-GalpNAc3NAcAN-(1-]n-where GlcNAc3NAcAN and GalNAc3NAcAN stand for 2,3-diacetamido-2,3-dideoxy-glucuronamide and -galacturonamide, respectively. The polysaccharide chain is terminated with a 4-O-methylated GalNAc3NAcAN residue and is rather short (n≤5).