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1. (Article ID: 1539)
 
Leone S, Izzo V, Lanzetta R, Molinaro A, Parrilli M, Di Donato A
The structure of the O-polysaccharide from Pseudomonas stutzeri OX1 containing two different 4-acylamido-4,6-dideoxy-residues, tomosamine and perosamine
Carbohydrate Research 340(4) (2005) 651-656
 

The structure of the O-polysaccharide from the lipopolysaccharide of Pseudomonas stutzeri OX1 was determined by chemical procedures and by 1D and 2D NMR spectroscopy. The analysis revealed the presence of a heterogeneous polymer made by 4-acetamido-4,6-dideoxy-d-mannopyranose (d-Rhap4NAc) and 4-formamido-4,6-dideoxy-d-galactopyranose (d-Fucp4NFo). The combination of chemical and NMR analyses indicates that the heterogeneity of the polymer depends on its non-stoichiometric glycosylation by Fuc4NFo, as shown below:The structure of the heterogeneous polymer was confirmed by Smith degradation that significantly simplified the structure of the O-polysaccharide, allowing for the isolation and identification of a linear homopolymer of Rhap4NAc

Lipopolysaccharide, NMR, structure, analysis, Pseudomonas, polymer, NMR spectroscopy, O-polysaccharide, O polysaccharide, chemical, identification, spectroscopy, degradation, isolation, linear, glycosylation, 2D NMR spectroscopy, 2D NMR, homopolymer, perosamine, Smith degradation, heterogeneity, Pseudomonas stutzeri

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