利用mini-Tn10转座系统研究芽孢杆菌生物被膜形成相关基因

Using Mini-Tn10 Transposon System to Research the Genes Involved in Biofilm Formation in Bacillus

摘要:

生物被膜对于细菌抵御外界环境的侵害具有重要的意义, 其形成和发展过程受到很多基因的调控和影响。本文利用mini-Tn10转座系统对野生型解淀粉芽孢杆菌NK10.BAhjaWT进行突变库的构建并随机选择400个转化子进行验证, 突变效率达到90%以上。从突变库中筛选到4株生物被膜缺陷株。经过鉴定, 上述突变株citB、citG、gpsA和yvfB基因发生插入突变。其中citB、citG和gpsA均与能量代谢相关, yvfB功能未知。本实验证明mini-Tn10转座系统对于芽孢杆菌突变库的构建具有高效和稳定的

Abstract:

Biofilm has great influence for bacteria to resist the harm from outer environment. Its forming and development are controlled by many different genes. In this research, an insertional mutagenesis library of a wide type Bacillus amyloliquefaciens NK10.BAhjaWT was built via mini-Tn10 transposon system to find out genes involved in biofilm formation. Four such genes have been screened, in which, citB, citG, gpsA are all related to the energy metabolism. The function of another gene of yvfB is unknown. In a word, mini-Tn10 transposon system was proved to be efficient and stable in Bacillus.