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Structure of the capsular polysaccharide of Klebsiella ozaenae serotype K4 containing 3-deoxy-d-glycero-d-galacto-nonulosonic acid

✍ Scribed by Yuriy A. Knirel; Nina A. Kocharova; Alexander S. Shashkov; Nikolay K. Kochetkov; Valeria A. Mamontova; Tamara F. Solov'eva

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 779 KB
Volume: 188
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(89)84067-4

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✦ Synopsis

The acidic capsular polysaccharide from the museum strain 2211 of Klebsiella ozuenae serotype K4 is built up of pentasaccharide repeating-units that contain residues of D-glucose, D-mannose, D-glucuronic acid, and 3-deoxy-D-gIycero-Dgulactu-nonulosonic acid (Kdn) in the ratios 2: 1: 1: 1, as well as an O-acetyl group. The last-named sugar, which is reported in bacterial polysaccharides for the first time, was identified as the methyl (methyl 3-deoxynonulopyranosid)onate obtained by methanolysis of the polysaccharide. On the basis of the results of partial acid hydrolysis, Smith degradation, and computer-assisted 13C-n.m.r. analysis, it was concluded that the capsular polysaccharide has the following structure: cr-Kdn z 4 -+3)-@-D-&p-( l-2)-a-D-GlcpA-( 1+3)-a-D-Manp-( l-3)-cw-D-Glcp-( I-,

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