Abstract
where R is an O-chain, linked via a β-bacillosamine residue. Francisella novicida (U112), a close relative of the highly virulent bacterium F. tularensis , is known to produce a lipopolysaccharide that is significantly different in biological properties from the LPS of F. tularensis . Here we present the results of the structural analysis of the F. novicida LPS core part, which is found to be similar to that of F. tularensis , differing only by one additional α-Glc residue: where R is an O-chain, linked via a β-bacillosamine (2,4-diamino-2,4,6-trideoxyglucose) residue. The lipid part of F. novicida LPS contains no phosphate substituent and apparently has a free reducing end, a feature also noted in F. tularensis LPS.
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