Hydrophobic Interactions of Succinoglycan Dimers Isolated from Sinorhizobium melilotiwith Hydrophobic Fluorescence Probes, 8-anilino-1-naphthalenesulfonate and 6-p-toluidino-2-naphthalenesulfonate

摘要

Succinoglycan, an acidic exopolysaccharide, is produced by the nitrogen-fixing bacterium, Shinorhizobium meliloti. The main chain consists of a β-1,3, β-1,4, and β-1,6 linked octasaccharide subunit containing one galactose at the reducing end and seven glucose residues. Also, the repeating unit carries pyruvyl, acetyl, and succinyl modifications. The acetyl group is located at the C6 position of the third sugar residue from the reducing galactose, the succinyl group is located at the C6 position of the seventh sugar, and the pyruvyl group is linked to the eighth sugar residue through a 4,6-ketal linkage.