| Literature DB >> 3912042 |
P E Jansson, J Lönngren, G Widmalm, K Leontein, K Slettengren, S B Svenson, G Wrangsell, A Dell, P R Tiller.
Abstract
The O-antigen polysaccharides of Klebsiella serotype O5 and Escherichia coli serotype O8 are serologically very similar or identical. The structures of these two polysaccharides have now been re-investigated. N.m.r. spectroscopy, chromium trioxide oxidation, hydrolysis with a specific phage enzyme, and f.a.b. mass spectrometry were the principal methods used. It is concluded that the O-antigen has the following structure, in which D-Man3Me is 3-O-methyl-D-mannose and n is approximately 10. (Formula: see text) Biosynthetic studies indicate that these antigens are synthesised by addition of D-mannopyranosyl groups to the "non-reducing" end of the mannan chain, and it seems possible that addition of a 3-O-methyl-D-mannopyranosyl group involves termination.Entities:
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Year: 1985 PMID: 3912042 DOI: 10.1016/s0008-6215(00)90412-9
Source DB: PubMed Journal: Carbohydr Res ISSN: 0008-6215 Impact factor: 2.104