Structure of the 3-deoxy-D-manno-octulosonic acid-(KDO)-containing capsular polysaccharide (K14 antigen) from Escherichia coli 06:K14:H31.
The chemical structure of the K14-antigenic polysaccharide (K14 antigen) of Escherichia coli 06:K14:H31 was elucidated by determination of the composition, 1H- and 13C-n.m.r. spectroscopy, periodate oxidation, and study of the oligosaccharides obtained by partial hydrolysis. The polysaccharide consists of [O-(2-acetamido-2-deoxy-beta-D-galactopyranosyl)-(1 leads to 5)-O-(3-deoxy-beta-D-manno-octulopyranosylonic acid)-(2 leads to 6)] repeating units, approximately 60% of the octonic acid units being O-acetylated and approximately 10% O-propionylated at O-8. The sequence of acetylated and propionylated residues is not known. The serologically-specific part of the K14 antigen residues in the polysaccharide part.
D016667:Bacterial Capsules; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D004926:Escherichia coli / Q000276:immunology*; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D009904:Optical Rotation; D011135:Polysaccharides, Bacterial / Q000302:isolation & purification*; D013400:Sugar Acids / Q000032:analysis*
D011135:Polysaccharides, Bacterial; D013400:Sugar Acids; C039514:capsular polysaccharide K14; C002532:2-keto-3-deoxyoctonate