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Structure of the amino acid-containing capsular polysaccharide from Escherichia coli O8:K49:H21

✍ Scribed by Linda M. Beynon; Guy G.S. Dutton; James C. Richards

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 809 KB
Volume: 205
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(90)80152-s

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✦ Synopsis

The structure of the capsular antigen of E. coli K49 and the oligosaccharides derived from it by partial acid hydrolysis were studied by 1D- and 2D-n.m.r. spectroscopy, g.l.c.-c.i.-mass spectrometry, and methylation analysis. The K49 polysaccharide consists of the repeating unit----4)-beta-D-GlcpA-(1----6)-beta-D-Galp-(1----6)-beta-D-Glcp- (1----3)-beta - D-GalpNAc-(1----. The glucuronic acid residues are substituted, in the apparent molar ratio of 4:1, with L-threonine and L-serine linked amidically to the carboxyl group.

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