发疹病毒 (Vibrio parahaemolyticus) 的基因组序列:一种与V cholerae不同的致病机制
Kozo Makino1, Kenshiro Oshima, Ken Kurokawa
1Department of Molecular Microbiology, Osaka University, Osaka, Japan.
Lancet (London, England)
|March 7, 2003
概括
致胃肠炎的Vibrio parahaemolyticus具有第三类分泌系统 (TTSS) 基因,与V. cholerae.不同. 这种基因组差异解释了这些相关细菌之间的不同的感染机制和临床症状.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 传染性疾病 传染性疾病
背景情况:
- 维布里奥·帕拉海莫利蒂库斯 (Vibrio parahaemolyticus) 是一种格拉姆阴性海洋细菌,是全球性食源性胃肠炎的原因.
- 特定的V. parahaemolyticus血清型导致了大流行,该生物体与Vibrio cholerae有密切的关系.
研究的目的:
- 为了确定临床V. parahaemolyticus菌株的整个基因组序列.
- 将V. parahaemolyticus基因组与V. cholerae的基因组进行比较,以确定遗传差异.
- 调查特定遗传因素在V. parahaemolyticus的独特致病性中的作用.
主要方法:
- 使用猎枪测序对V. parahaemolyticus菌株RIMD2210633的全基因组测序.
- 使用Gambler和Glimmer程序识别编码序列.
- 使用MUMmer.使用V.cholerae进行比较基因组分析.
主要成果:
- V. parahaemolyticus的基因组包括两个圆形染色体 (3,288,558 bp和1,877,212 bp) 与4,832个基因.
- 在V. parahaemolyticus和V. cholerae染色体之间观察到显著的基因组重组.
- 在V. parahaemolyticus中发现了编码III型分泌系统 (TTSS) 的基因,但在V. cholerae.中没有.
结论:
- 第三类分泌系统 (TTSS) 是导致胃肠炎的细菌中的关键毒性因素.
- V. parahaemolyticus 和 V. cholerae 使用不同的感染策略.
- 在V. parahaemolyticus中存在TTSS解释了其炎症性腹和系统性感染的潜力,使其与V. cholerae的非炎症性腹区别开来.
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