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志贺氏菌属鲍氏(S.boydii)亚群基因组组成与进化分析 被引量:1

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摘要 利用比较基因组杂交法(comparativegenomichybridization,CGH)对志贺氏菌属鲍氏(S.boydii)亚群共18个血清型代表菌株的基因组结构组成进行比较分析,结果显示,该亚群基因组的“共有骨架”包含2552个与非致病性大肠杆菌K12同源的ORFs.比对K12基因组,该亚群所有菌株基因组共同缺失ORFs为199个,主要涉及外膜蛋白编码基因和O-抗原合成相关基因,而属于亚群特异性的ORFs主要以噬菌体基因和未知功能ORFs为主,一些参与铁离子代谢、运输和Ⅱ型分泌系统基因在大多数的鲍氏菌株中存在.以比较基因组杂交法得到的进化分析显示:鲍氏亚群18个血清型代表菌株可分为4组,其中13型与其他菌株有较大的差异.这种分组结果与某些代谢相关的基因分布情况存在对应关系.通过对该亚群“共有骨架”、缺失基因和株特异基因,以及进化分类等方面的分析,以期探索该亚群基因组的进化规律,并为志贺氏菌属鲍氏亚群的致病机理、疫苗研制和药物开发等方面的研究提供重要线索.
出处 《中国科学(C辑)》 CSCD 北大核心 2005年第4期359-364,共6页 Science in China(Series C)
基金 国家重大基础研究规划项目(批准号:G1999054103) 国家高技术研究发展计划项目(批准号:2001AA223011) 国际科技合作重点项目(批准号:2001AA223116)
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参考文献16

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