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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2016, Vol. 17 Issue (2): 83-99    DOI: 10.1631/jzus.B1500187
Review     
Strategies used for genetically modifying bacterial genome: site-directed mutagenesis, gene inactivation, and gene over-expression
Jian-zhong Xu, Wei-guo Zhang
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
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Abstract  With the availability of the whole genome sequence of Escherichia coli or Corynebacterium glutamicum, strategies for directed DNA manipulation have developed rapidly. DNA manipulation plays an important role in understanding the function of genes and in constructing novel engineering bacteria according to requirement. DNA manipulation involves modifying the autologous genes and expressing the heterogenous genes. Two alternative approaches, using electroporation linear DNA or recombinant suicide plasmid, allow a wide variety of DNA manipulation. However, the over-expression of the desired gene is generally executed via plasmid-mediation. The current review summarizes the common strategies used for genetically modifying E. coli and C. glutamicum genomes, and discusses the technical problem of multi-layered DNA manipulation. Strategies for gene over-expression via integrating into genome are proposed. This review is intended to be an accessible introduction to DNA manipulation within the bacterial genome for novices and a source of the latest experimental information for experienced investigators.

Key words： Escherichia coli      Corynebacterium glutamicum      DNA manipulation      Site-directed mutagenesis      Gene inactivation      Gene over-expression     
Received: 04 August 2015      Published: 01 February 2016
CLC:  Q754  
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Jian-zhong Xu
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Jian-zhong Xu, Wei-guo Zhang. Strategies used for genetically modifying bacterial genome: site-directed mutagenesis, gene inactivation, and gene over-expression. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2016, 17(2): 83-99.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.B1500187     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2016/V17/I2/83

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