Structure of the exopolysaccharide of Vibrio diabolicus isolated from a deep-sea hydrothermal vent

The structure of the exopolysaccharide produced under laboratory conditions by Vibrio diabolicus, a bacterium recovered from a deep-sea hydrothermal vent, has been investigated using sugar and methylation analysis and NMR spectroscopy. The polysaccharide consists of a linear tetrasaccharide repeating unit with the following structure.→3)-β-d-GlcpNAc-(1→4)-β-d-GlcpA-(1→4)-β-d-GlcpA-(1→4)-α-d-GalpNAc-(1→