Structure of a 2âaminoethyl phosphateâcontaining Oâspecificpolysaccharide of Proteus penneriâ8 from a new serogroup O67
2000
Knirel, Yuriy A. | Zych, Krystyna | Vinogradov, Eugeny V. | Shashkov, Alexander S. | Sidorczyk, Zygmunt
An acidic Oâspecific polysaccharide was obtained by mild acid degradation of the Proteus penneri 8 lipopolysaccharide and found to contain dâglucose, dâgalacturonic acid, 2âacetamidoâ2âdeoxyâdâglucose, 2âacetamidoâ2âdeoxyâdâgalactose, 2âacetamidoâ2,6âdideoxyâlâgalactose (lâFucNAc) and 2âaminoethyl phosphate (PEtn) in the ratios 2â:â1â:â1â:â1â:â1â:â1. 1H and 13CâNMR spectroscopy was applied to the intact and dephosphorylated polysaccharides, and the following structure of the hexasaccharide repeating unit was established: The Oâspecific polysaccharide has a unique structure, and, accordingly, we propose for P.âpenneriâ8 a new Proteus O67 serogroup, in which this strain is at present the single representative. The nature of epitopes on LPS of P.âpenneri 34, P.âmirabilis O16, P.âmirabilis O23 and P.âvulgaris O22, which crossâreact with Oâantiserum against P.âpenneriâ8, is discussed.
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