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Interspecies electro-transformation in Corynebacteria.

C Bonamy1, A Guyonvarch, O Reyes

  • 1Université Paris-Sud, Centre d'Orsay, Institut de Génétique et Microbiologie, France.

FEMS Microbiology Letters
|January 1, 1990
PubMed
Summary

Researchers optimized plasmid DNA electro-transformation in Corynebacteria, achieving high efficiency. Factors like electric field strength and cell concentration significantly impact success, suggesting DNA modification plays a role.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Biotechnology

Background:

  • Corynebacteria are industrially important bacteria.
  • Efficient genetic manipulation is crucial for strain improvement.
  • Electro-transformation is a key method for introducing foreign DNA.

Purpose of the Study:

  • To optimize plasmid DNA electro-transformation in nine Corynebacteria strains.
  • To investigate factors affecting transformation efficiency.
  • To understand the role of DNA modification in transformation.

Main Methods:

  • Electro-transformation of plasmid DNA into intact Corynebacteria cells.
  • Systematic variation of electric field strength, pulse length, DNA concentration, and cell physiological state.
  • Analysis of transformation efficiency across different conditions.

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Main Results:

  • Efficient electro-transformation was achieved in Brevibacterium lactofermentum, Brevibacterium flavum, Corynebacterium glutamicum, and Corynebacterium melassecola.
  • Optimal conditions yielded over 10(7) transformants per microgram of DNA.
  • Transformation efficiency correlated with electric field strength, pulse length, DNA concentration, and cell state.

Conclusions:

  • Electro-transformation is a highly effective method for genetic modification of various Corynebacteria species.
  • Optimized parameters are essential for maximizing transformation efficiency.
  • DNA modification may influence the success of electro-transformation in these bacteria.