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NMR studies of succinoglycan repeating-unit octasaccharides from Rhizobium meliloti and Agrobacterium radiobacter |
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| Authors: | C cile Chouly, Ian J. Colquhoun, Anne Jodelet, Gregory York,Graham C. Walker |
| Affiliation: | Institute of Food Research, Norwich Laboratory, Norwich Research Park, Colney, Norwich, NR4 7UA, UK Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA |
| Abstract: | Complete 1H and 13C-nuclear magnetic resonance assignments have been obtained for the octasaccharide repeating units of the bacterial polysaccharide succinoglycan from Rhizobium meliloti Rm1021 and Agrobacterium radiobacter NCIB 11883. The assignments were used to determine the locations of the O-succinyl and O-acetyl substituents. The O-acetyl substituent in Rm1021 was attached to the 3rd residue from the reducing end, and the O-succinyl group was attached to the 7th residue in both octasaccharides. The structure of the Rm1021 octasaccharide is as shown below: A small amount of succinate was also attached to C6 of the 6th residue in both octasaccharides. |
| Keywords: | nuclear magnetic resonance oligosaccharides succinoglycan |
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