An Efficient Electro-Competent Cells Generation Method of Xanthomonas campestris pv. campestris: Its Application for Plasmid Transformation and Gene Replacement - Advances in Microbiology

AiM > Vol.6 No.2, February 2016

An Efficient Electro-Competent Cells Generation Method of Xanthomonas campestris pv. campestris: Its Application for Plasmid Transformation and Gene Replacement ()

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DOI: 10.4236/aim.2016.62008 4,580 Downloads 6,767 Views Citations

Author(s)

Xiuli Wang, Daning Zheng, Rubing Liang^*

Affiliation(s)

School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.

ABSTRACT

A simple and rapid method to prepare efficient electro-competent cells of Xanthomonas campestris pv. campestris was generated, with up to 100-fold transformation efficiencies over the existing procedures. The overnight cultures were treated with sucrose solution and micro-centrifuged at room temperature; the entire electro-competent cells generation process can be completed in 15 minutes. It overcomes the complication and time-consuming shortcomings of the traditional conjugation or electro-transformation methods in this strain. Both the replicative plasmids and non-replicative plasmids could be transformed or integrated efficiently using this method. And the DNA concentration, cells growth stage, field strength and recovery time all had influences on the transformation efficiency. In the optimal conditions, the transformation efficiency for the replicative plasmids was 10⁹ transformants per microgram DNA, and for non-replicative plasmids was 150 transformants per microgram DNA. Further with the homology sequences, two chromosomal target genes were deleted efficiently and the knockout strains were obtained easily.

KEYWORDS

Xanthomonas, Electro-Competent Cells, Electro-Transformation, Gene Replacement, Integration

Share and Cite:

Wang, X. , Zheng, D. and Liang, R. (2016) An Efficient Electro-Competent Cells Generation Method of Xanthomonas campestris pv. campestris: Its Application for Plasmid Transformation and Gene Replacement. Advances in Microbiology, 6, 79-87. doi: 10.4236/aim.2016.62008.

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