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Updated: Aug 11, 2026

OLIgo Mass Profiling (OLIMP) of Extracellular Polysaccharides
Published on: June 20, 2010
The structure of the exocellular polysaccharide produced by the Archaeon Haloferax gibbonsii (ATCC 33959)
N A Paramonov1, L A Parolis, H Parolis
1School of Pharmaceutical Sciences, Rhodes University, Grahamstown, South Africa.
Abstract:
The structure of the neutral exocellular polysaccharide isolated from the Archaeon Haloferax gibbonsii (ATCC 33959) has been determined using acid hydrolysis, methylation analysis and NMR spectroscopy. The polysaccharide contained D-Man, D-Glc, D-Gal and L-Rha in the ratios 2:1:3:1. The substitution patterns of the sugar residues were deduced from the methylation analysis which indicated the polymer to be composed of a heptasaccharide repeating unit containing two branches. The 1H and 13C NMR resonances of the component sugars were assigned using COSY, HOHAHA, HMQC, and HMQC-TOCSY 2D NMR experiments and the sequence of the sugars in the repeating unit was determined from NOESY and HMBC experiments. The structure can be written as: [formula: see text]
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