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General method for plasmid construction using homologous recombination

C K Raymond1, T A Pownder, S L Sexson

  • 1ZymoGenetics, Seattle, WA, USA.

Biotechniques
|January 23, 1999
PubMed
Summary
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This study introduces a yeast-based plasmid assembly method using homologous recombination. This efficient technique simplifies DNA fragment cloning for diverse expression systems, bypassing traditional molecular biology methods.

Area of Science:

  • Molecular Biology
  • Synthetic Biology
  • Biotechnology

Background:

  • Traditional plasmid construction relies on PCR, ligation, and restriction enzymes, which can be time-consuming and limiting.
  • Existing methods often require specific DNA sequences or extensive manipulation, hindering broad applicability.
  • Developing efficient and versatile plasmid assembly techniques is crucial for advancing genetic engineering and synthetic biology.

Purpose of the Study:

  • To present a general, yeast-based method for plasmid assembly applicable beyond yeast research.
  • To demonstrate the efficiency and advantages of using homologous recombination in Saccharomyces cerevisiae for DNA fragment cloning.
  • To enable the construction of multifunctional cloning vectors for diverse expression systems.

Main Methods:

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  • Utilizing the homologous recombination, double-stranded break repair pathway in Saccharomyces cerevisiae.
  • Employing synthetic, double-stranded recombination linkers to subclone DNA fragments into plasmids.
  • Developing a procedure for shuttling assembled plasmids from yeast to E. coli for screening and large-scale preparation.

Main Results:

  • Achieved >80% efficiency in subcloning DNA fragments using recombination linkers.
  • Presented quantitative data on the impact of DNA concentration and overlap length on recombination efficiency.
  • Demonstrated successful plasmid transfer from yeast to E. coli for downstream applications.

Conclusions:

  • The described yeast-based method offers a simple, efficient, and versatile approach to plasmid construction.
  • This technology bypasses the need for PCR amplification and restriction enzyme-based cloning, expanding cloning possibilities within any DNA sequence.
  • The method leverages inexpensive and readily available yeast strains, plasmids, and microbial techniques, making it broadly accessible for various expression systems.