Author/Authors :
Evelina L. Zdorovenko، نويسنده , , Olga A. Valueva، نويسنده , , Vadim V. Kachala، نويسنده , , Alexander S. Shashkov، نويسنده , , Yuriy A. Knirel، نويسنده , , Iwona Komaniecka، نويسنده , , Adam Choma، نويسنده ,
Abstract :
The O-polysaccharide was obtained from the lipopolysaccharide of the stem-nodulating nitrogen-fixing bacterium Azorhizobium caulinodans HAMBI 216 and studied by sugar and methylation analyses along with 1H and 13C NMR spectroscopy. The polysaccharide was found to have a linear pentasaccharide repeating unit containing d-rhamnose and its rarely occurring 2-O-methyl (Rha2OMe) and 3-C-methyl (Rha3CMe) derivatives and having the following structure:
→3)-α-d-Rhap2OMe-(1→2)-β-d-Rhap3CMe-(1→3)-α-d-Rhap-(1→2)-β-d-Rhap3CMe-(1→3)-α-d-Rhap-(1→
Keywords :
3-C-Methyl-d-rhamnose , 2-O-Methyl-d-rhamnose , Azorhizobium caulinodans , Bacterial polysaccharide structure , Lipopolysaccharide
