alexa High heterogeneity of the exopolysaccharides of Pseudomonas solanacearum strain GMI 1000 and the complete structure of the major polysaccharide.
Microbiology

Microbiology

Journal of Bacteriology & Parasitology

Author(s): Orgambide G, Montrozier H, Servin P, Roussel J, TrigaletDemery D,

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Abstract The exopolysaccharide of Pseudomonas solanacearum, which is believed to play an important role in bacterial virulence, was considered by most authors as a homogeneous entity essentially composed of N-acetylgalactosamine. The present work demonstrates the high degree of heterogeneity of this exopolysaccharidic material, which consists of a high molecular weight acidic polysaccharide and a mainly noncarbohydrate structure as major subfractions. Rhamnose-rich polyoside and glucan fractions are also present as minor components. We report the complete structure of the acidic heteropolymer involving, in addition to N-acetylgalactosamine, equimolar ratios of two rare amino sugars, 2-N-acetyl-2-deoxy-L-galacturonic acid and 2-N-acetyl-4-N-(3-hydroxybutanoyl)-2,4,6-trideoxy-D-glucose. The structure of this acidic exopolysaccharide provides the first precise basis for the analysis of the correlation exopolysaccharide structure with pathogenicity in P. solanacearum.
This article was published in J Biol Chem and referenced in Journal of Bacteriology & Parasitology

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