Lipopolysaccharides of Pantoea agglomerans 7604 and 8674 with structurally related O-polysaccharide chains: Chemical identification and biological properties
| Autor: | L. D. Varbanets, Yuriy A. Knirel, Evelina L. Zdorovenko, Alexander S. Shashkov, Tetiana V. Bulyhina, Alexandra A. Kadykova |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Lipopolysaccharides Spectrometry Mass Electrospray Ionization Polymers and Plastics Proton Magnetic Resonance Spectroscopy 030106 microbiology Polysaccharide Microbiology Lipid A 03 medical and health sciences Residue (chemistry) Materials Chemistry Carbon-13 Magnetic Resonance Spectroscopy Sugar chemistry.chemical_classification Strain (chemistry) biology Pantoea Immune Sera Organic Chemistry Fatty Acids O Antigens Nuclear magnetic resonance spectroscopy biology.organism_classification Pantoea agglomerans 030104 developmental biology Biochemistry chemistry lipids (amino acids peptides and proteins) Bacteria |
| Zdroj: | Carbohydrate polymers. 181 |
| ISSN: | 1879-1344 |
| Popis: | Structurally related O-specific polysaccharide (O-antigen) and lipid A components were obtained by mild acid degradation of the lipopolysaccharides (LPSs) of two strains of bacteria Pantoea agglomerans, 7604 and 8674. Studies by sugar analysis along with 1D and 2D 1H and 13C NMR spectroscopy enabled elucidation of the following structures of the O-polysaccharides, which differ only in the linkage configuration of a side-chain glucose residue: R = α- d -Glcp in strain 7604 or β- d -Glcp in strain 8674 Lipid A samples were studied by GC–MS and high-resolution ESI–MS and found to be represented by penta- and tetra-acyl species; lipid A of strain 8674 also included hexaacyl species. A peculiar feature of lipid A of both strains is the presence of the major cis-9-hexadecenoic (palmitoleic) acid, which has not been found in P. agglomerans strains studied earlier. The LPSs of both strains were pyrogenic, reduced the average adhesion and the index of adhesiveness and showed a relatively low level of lethal toxicity. O-antiserum against strain 7604 showed one-way cross-reactivity with the LPS of strain 8674, and O-antisera against both strains cross-reacted with LPSs of some other Р. agglomerans strains but more strains were serologically unrelated. These structural and serological data indicate immunochemical heterogeneity of Р. agglomerans strains and will find demand in classification of Р. agglomerans by O-antigens. Download : Download high-res image (35KB) Download : Download full-size image |
| Databáze: | OpenAIRE |
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