Structural study on lipid A and the O-specific polysaccharide of the lipopolysaccharide from a clinical isolate of Bacteroides vulgatus from a patient with Crohn's disease

被引：19

作者：

Hashimoto, M

Kirikae, F

Dohi, T

Adachi, S

Kusumoto, S

Suda, Y

Fujita, T

Naoki, H

Kirikae, T ^{[1
]}

机构：

[1] Int Med Ctr Japan, Res Inst, Shinjuku Ku, Tokyo 1628655, Japan

[2] Asahi Univ, Sch Dent, Dept Oral Microbiol, Gifu, Japan

[3] Osaka Univ, Grad Sch Sci, Suita, Osaka 565, Japan

[4] Hyogo Med Univ, Dept Bacteriol, Nishinomiya, Hyogo, Japan

来源：

EUROPEAN JOURNAL OF BIOCHEMISTRY | 2002年 / 269卷 / 15期

关键词：

Bacteroides vulgatus; fast-atom-bombardment tandem mass spectrometry; lipopolysaccharide; MALDI-TOF-MS; NMR;

D O I：

10.1046/j.1432-1033.2002.03062.x

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Bacteroides vulgatus has been shown to be involved in the aggravation of colitis. Previously, we separated two potent virulence factors, capsular polysaccharide (CPS) and lipopolysaccharide (LPS), from a clinical isolate of B. vulgatus and characterized the structure of CPS. In this study, we elucidated the structures of O-antigen polysaccharide (OPS) and lipid A in the LPS. LPS was subjected to weak acid hydrolysis to produce the lipid A fraction and polysaccharide fraction. Lipid A was isolated by preparative TLC, and its structure determined by MS and NMR to be similar to that of Bacteroides fragilis except for the number of fatty acids. The polysaccharide fraction was subjected to gel-filtration chromatography to give an OPS-rich fraction. The structure of OPS was determined by chemical analysis and NMR spectroscopy to be a polysaccharide composed of the following repeating unit: [-->4)alpha-L-Rhap(1-->3)beta-D-Manp(1-->].

引用

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页码：3715 / 3721

页数：7

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