Improved recombinational stability of lentiviral expression vectors using reduced-genome Escherichia coli

Biotechniques. 2007 Oct;43(4):466, 468, 470. doi: 10.2144/000112585.


Lentiviral expression clones, which contain long direct repeats, often show dramatic instability in Escherichia coli, leading to difficulties in obtaining valid clones. We show that the reduced-genome E. coli strain MDS42 is capable of stabilizing lentiviral expression clones containing direct repeats, and outperforms many commonly used cloning strains for this purpose. In addition, the strain has several characteristics that make it highly amenable for use in recombinational cloning systems.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Escherichia coli / genetics*
  • Escherichia coli Proteins / genetics
  • Genetic Enhancement / methods
  • Genetic Vectors / genetics*
  • Genome, Bacterial / genetics*
  • Genomic Instability / genetics*
  • Lentivirus / genetics*
  • Protein Engineering / methods
  • Recombinant Proteins / metabolism*
  • Recombination, Genetic / genetics
  • Transfection / methods*


  • Escherichia coli Proteins
  • Recombinant Proteins