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植物病原细菌hrp基因簇比较基因组分析

DOI: 10.3969/j.issn.1000-7091.2013.02.005, PP. 27-31

Keywords: 植物病原细菌,hrp基因簇,生物信息学分析

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Abstract:

hrp基因是植物病原细菌中一类重要的致病基因,一般成簇排列。对14种已完成全基因组测序的植物病原细菌基因组中的hrp基因簇进行了大小、G+C含量、基因组成的BlastP比较。发现它们的大小在18~24kb,由22~28个基因组成。欧文氏菌属和假单胞菌属的菌株中G+C含量较低,拉尔氏菌属和黄单胞菌属菌株的G+C含量较高。而且,各菌属的基因簇都有其独有的hrp基因,如假单胞菌属是hrpK1、hrpV、hrpA|欧文氏菌属是hrpT、hrpV、hrpA|拉尔氏菌属是hrpZ、hrpX、hrpY、hrpV|黄单胞菌属是hrpE、hrpD6、hpaA。其中,基因hrpA1、hrpA、hrpY和hrpE在假单胞菌属、欧文氏菌属、拉尔氏菌属和黄单胞菌属中均编码Ⅲ型菌毛的基因,可能在寄主和病原物识别中起重要作用。

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