Structure of the O-polysaccharide of Pseudomonas syringae pv. delphinii NCPPB 1879T Having Side Chains of 3-Acetamido-3,6-dideoxy-D-galactose Residues.

Autor: Zdorovenko, E., Zatonsky, G., Kocharova, N., Shashkov, A., Knirel, Y., Ovod, V.
Zdroj: Biochemistry (00062979); May2002, Vol. 67 Issue 5, p558-565, 8p
Abstrakt: The O-polysaccharide (OPS) was obtained from the lipopolysaccharide of Pseudomonas syringae pv. delphinii NCPPB 1879T and studied by sugar and methylation analyses, Smith degradation, and 1H- and 13C-NMR spectroscopy. The OPS was found to contain residues of L-rhamnose (L-Rha) and 3-acetamido-3,6-dideoxy-D-galactose (D-Fuc3NAc), and the following structure of the major ( n = 2) and minor ( n = 3) heptasaccharide repeating units of the OPS was established: The OPS is distinguished by the presence of oligosaccharide side chains consisting of three D-Fuc3NAc residues that are connected to each other by the (α1→2)-linkage. The OPS is characterized by a structural heterogeneity due to a different position of substitution of one of the four L-rhamnose residues in the main chain of the repeating unit as well as to the presence of oligosaccharide units with an incomplete side chain. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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