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Related Experiment Videos

Heritable damage to yeast caused by transformation.

N Danhash1, D C Gardner, S G Oliver

  • 1Department of Biochemistry and Applied Molecular Biology, University of Manchester Institute of Science and Technology, UK.

Bio/Technology (Nature Publishing Company)
|February 1, 1991
PubMed
Summary

Introducing plasmid DNA into yeast via transformation or electroporation causes slow growth. This trait, dependent on the absence of the 2-micron plasmid, is inherited, indicating imprecise genetic manipulation in yeast.

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Area of Science:

  • Molecular Biology
  • Yeast Genetics

Background:

  • Plasmid DNA introduction into yeast is a common technique.
  • The native 2-micron nuclear DNA plasmid influences cellular processes.
  • Understanding genetic manipulation in yeast is crucial for biotechnology.

Purpose of the Study:

  • To investigate the effects of plasmid DNA introduction on yeast growth.
  • To determine the inheritance pattern of induced phenotypes.
  • To assess the precision of recombinant DNA technology in yeast.

Main Methods:

  • Yeast transformation and electroporation were used for plasmid DNA introduction.
  • Cytoduction was employed as a control method.
  • Phenotypic analysis focused on growth rate and inheritance patterns.

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  • Experiments were conducted in the presence and absence of the native 2-micron plasmid.

    • Main Results:

    • Transformation and electroporation, but not cytoduction, induced a slow growth phenotype.
    • This slow growth phenotype was inherited as a dominant Mendelian trait.
    • The phenotype was only observed when the native 2-micron plasmid was absent.
    • The findings suggest that plasmid introduction can lead to unpredictable cellular responses.

    Conclusions:

    • Recombinant DNA technology in yeast, particularly through transformation and electroporation, can result in unintended and heritable phenotypic changes.
    • The absence of the native 2-micron plasmid is critical for the manifestation of this slow growth phenotype.
    • These results highlight that genetic manipulation in yeast may not always be as precise or defined as commonly assumed.