Structure of the major exopolysaccharide produced by Azotobacter beijerinckii B-1615
| Autor: | Alexander S. Shashkov, Irina V. Botvinko, Irina V. Danilova, Varvara A. Derevitskaya, Leonid M. Likhosherstov, Sofia N. Senchenkova |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
chemistry.chemical_classification
Magnetic Resonance Spectroscopy Strain (chemistry) biology Rhamnose Organic Chemistry Molecular Sequence Data Carbohydrates General Medicine Polysaccharide biology.organism_classification Biochemistry Analytical Chemistry chemistry.chemical_compound chemistry Carbohydrate Sequence Acetylation Polysaccharides Galactose Azotobacter Carbohydrate Conformation Pyruvic acid Bacteria Azotobacteraceae |
| Zdroj: | Carbohydrate research. 222 |
| ISSN: | 0008-6215 |
| Popis: | A. beijerinckii strain B-1615 produced two acidic exopolysaccharides in the ratio approximately 9:1. The minor polysaccharide contained mannuronic and guluronic acids in the ratio 2.3:1 and is a bacterial alginate. The major polysaccharide consisted of D-galactose, L-rhamnose, and pyruvic acid in the ratios 2:1:1 and was acetylated. On the basis of methylation analysis, and 1H- and 13C-n.m.r. spectroscopy of the polysaccharide before and after removal of the pyruvic acid residues and O-deacetylation, it was concluded that the major polysaccharide had the structure [formula; see text] with up to 1.5 OAc groups per repeating unit. |
| Databáze: | OpenAIRE |
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