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短小芽胞杆菌抑菌相关基因的高效克隆

, PP. 423-428

Keywords: 短小芽胞杆菌,Solexa扫描,抑菌相关基因

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Abstract:

为有效挖掘生防短小芽胞杆菌Bacilluspumilus的抑菌相关基因,对DX01菌株进行了Solexa基因组扫描,并选取其中2个代表性基因TasA和Surf2,以DX01基因组DNA为模板,采用PCR方法对其进行克隆、序列比对及系统进化分析。结果表明,DX01菌株共得到4267个基因,有3145个具有明确生物学功能的蛋白。其中,与短小芽胞杆菌抑菌活性相关的基因(簇)有84个,包括2个细菌防御酶基因、2个细菌生物膜形成相关基因、1个信号转导基因、27个细胞壁降解或水解酶基因、15个抗生素合成或转运基因、4个抑菌蛋白基因、1个次生代谢物合成基因簇及32个细菌鞭毛生物合成与调控相关基因。TasA基因在芽胞杆菌属细菌中具有高度的保守性,各同源基因的序列相似性在92%以上;而Surf2基因的同源基因在该属细菌中具有一定的变异性,有的序列相似性低至73%。

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