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Structural studies of the Vibrio cholerae O:5 O-antigen polysaccharide

✍ Scribed by Kerstin Hermansson; Per-Erik Jansson; Tord Holme; Björn Gustavsson

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
943 KB
Volume
248
Category
Article
ISSN
0008-6215

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✦ Synopsis

The 0-polysaccharide from k%rio cholerae 0 : 5 has been investigated, using NMR spectroscopy as the main method. Fast atom bombardment mass spectrometry (FABMS) studies of fragments obtained on treatment with anhydrous hydrogen fluoride or methanolic hydrogen chloride gave further structural information. Some structural features were also determined by comparison of nuclear Overhauser enhancement (NOE) contacts with calculated H-H distance in different oligosaccharide models. It is concluded that the O-~lysa~haride has the fobbing structure, in which D-Qui~NAc4NAc is 2,4-dia~tamido-2,4,6-trideo~-D-8lu~se, and D-FucpfNX is 3-amino-3,6-dideoxy-n-galactose acylated with a (R,R)-3-hydroxy-3-methyl-5-oxoproline group. 4 3l-fi-D-Qui~NAc4NAc_(l+ 4)-@-ManpNAcA-(l -+ 3 1 a-D-Fucp3NX I2 Hermansson et al./Carbohydr.

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