کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1385499 | 1500906 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structure of the O-antigen of Providencia stuartii O20, a new polysaccharide containing 5,7-diacetamido-3,5,7,9-tetradeoxy-l-glycero-d-galacto-non-2-ulosonic acid Structure of the O-antigen of Providencia stuartii O20, a new polysaccharide containing 5,7-diacetamido-3,5,7,9-tetradeoxy-l-glycero-d-galacto-non-2-ulosonic acid](/preview/png/1385499.png)
The O-polysaccharide chain of the lipopolysaccharide (LPS) of Providencia stuartii O20 was found to contain d-glucuronic acid, N-acetyl-d-glucosamine, and a rarely occurring higher sugar 5,7-diacetamido-3,5,7,9-tetradeoxy-l-glycero-d-galacto-non-2-ulosonic acid (di-N-acetyl-8-epilegionaminic acid, 8eLeg5Ac7Ac). Degradation of the LPS with dilute acetic acid caused depolymerization of the polysaccharide chain by the ketosidic linkage to give a tetrasaccharide corresponding to the repeating unit of the polysaccharide. Based on sugar and methylation analyses of the tetrasaccharide and O-deacylated LPS as well as ESIMS, 1H and 13C NMR spectroscopy data, the structure of the O-polysaccharide of P. stuartii O20 was established.
→8)-α-8eLegp5Ac7Ac-(2→4)-β-d-GlcpA-(1→4)-β-d-GlcpA-(1→3)-α-d-GlcpNAc-(1→
Journal: Carbohydrate Research - Volume 342, Issues 3–4, 26 February 2007, Pages 653–658