Structural investigation of Klebsiella serotype K46 poly-saccharide
摘要:
The structure of the capsular polysaccharide from Klebsiella type K46 has been investigated by using the techniques of methylation analysis, periodate oxidation, and partial hydrolysis. The anomeric linkages were determined by 1H- and 13C-n.m.r. spectroscopy of the polysaccharide and of derived poly- and oligo-saccharides obtained through degradative procedures. 1H-N.m.r. spectroscopy of the polysaccharide in D2O showed clearly a ratio of one (1-carboxyethylidene) group (CH3, delta 1.47) to six anomeric protons (delta 4.62--5.29). The polysaccharide was shown to consist of the following hexasaccharide repeating unit, which is unique in this series in having a (1-carboxyethylidene) acetal group on a lateral, but nonterminal, sugar residue. (Formula: see text).
The capsular polysaccharide of klebsiella serotype K60; a novel, structural pattern
作者:Guy G.S. Dutton、Jose Di Fabio
DOI:10.1016/s0008-6215(00)85197-6
日期:1980.12
Non-linear capsularpolysaccharides of Klebsiella bacteria usually have a single side-chain per repeating unit, or, less commonly, two side-chains attached to the same unit. The capsularpolysaccharide from Klebsiellaserotype K60 is unique in having three side-chains in the heptasaccharide repeating-unit shown. The structure, including the configuration of the glycosidic linkages, was established
Novel helicobacter pylori-binding substances and use thereof
申请人:——
公开号:US20040086514A1
公开(公告)日:2004-05-06
Helicobacter pylori
-binding substances comprising Gal&bgr;3GlcNAc or Gal&bgr;3GalNAc are described, as well as use thereof in pharmaceutical compositions and food-stuff, and methods for treatment of conditions due to the presence of
Helicobacter pylori
. Also use of said substance for the identification of bacterial adhesions, for the production of a vaccine against
Helicobacter pylori
, for diagnosis of
Helicobacter pylori
infections, for typing of
Helicobacter pylori
, for identification of
Helicobacter pylori
binding substances and for inhibition of the binding of
Helicobacter pylori
is described.
Structural investigation of Klebsiella serotype K46 poly-saccharide
作者:Koichi Okutani、Guy G.S. Dutton
DOI:10.1016/s0008-6215(00)85903-0
日期:1980.11
The structure of the capsular polysaccharide from Klebsiella type K46 has been investigated by using the techniques of methylation analysis, periodate oxidation, and partial hydrolysis. The anomeric linkages were determined by 1H- and 13C-n.m.r. spectroscopy of the polysaccharide and of derived poly- and oligo-saccharides obtained through degradative procedures. 1H-N.m.r. spectroscopy of the polysaccharide in D2O showed clearly a ratio of one (1-carboxyethylidene) group (CH3, delta 1.47) to six anomeric protons (delta 4.62--5.29). The polysaccharide was shown to consist of the following hexasaccharide repeating unit, which is unique in this series in having a (1-carboxyethylidene) acetal group on a lateral, but nonterminal, sugar residue. (Formula: see text).