A simple and effective method for construction of Escherichia coli strains proficient for genome engineering

PLoS One. 2014 Apr 18;9(4):e94266. doi: 10.1371/journal.pone.0094266. eCollection 2014.

Abstract

Multiplex genome engineering is a standalone recombineering tool for large-scale programming and accelerated evolution of cells. However, this advanced genome engineering technique has been limited to use in selected bacterial strains. We developed a simple and effective strain-independent method for effective genome engineering in Escherichia coli. The method involves introducing a suicide plasmid carrying the λ Red recombination system into the mutS gene. The suicide plasmid can be excised from the chromosome via selection in the absence of antibiotics, thus allowing transient inactivation of the mismatch repair system during genome engineering. In addition, we developed another suicide plasmid that enables integration of large DNA fragments into the lacZ genomic locus. These features enable this system to be applied in the exploitation of the benefits of genome engineering in synthetic biology, as well as the metabolic engineering of different strains of E. coli.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Escherichia coli / genetics*
  • Escherichia coli / metabolism
  • Genetic Engineering / methods*
  • Genome, Bacterial / genetics*
  • Plasmids / genetics
  • Xylose / analogs & derivatives
  • Xylose / biosynthesis

Substances

  • deoxyxylulose phosphate
  • Xylose

Grants and funding

This work was supported by the National Research Foundation of Korea (NRF) through grants funded by the Ministry of Science, ICT & Future Planning (MSIP) (NRF-2009-C1AAA001-2009-0093491), by the Intelligent Synthetic Biology Center of Global Frontier Project funded by the MSIP (2011-0031948), and by a grant from the Next-Generation Bio Green 21 Program (SSAC, PJ0099058), Rural Development Administration, Republic of Korea. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.