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Chemical complementation: small-molecule-based genetic selection in yeast.

Bahareh Azizi1, Eileen I Chang, Donald F Doyle

  • 1School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA.

Biochemical and Biophysical Research Communications
|June 18, 2003
PubMed
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Scientists developed "chemical complementation" to link small molecules to yeast survival using nuclear receptors. This genetic selection system enables protein and metabolic engineering by controlling yeast growth with specific compounds.

Area of Science:

  • Synthetic biology
  • Molecular biology
  • Biotechnology

Background:

  • Protein and metabolic engineering require methods to link small molecules to genetic selection.
  • Classical genetic complementation is a powerful tool but lacks direct small-molecule linkage.

Purpose of the Study:

  • To establish a novel
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    • Main Methods:

    • Utilized nuclear receptors to establish a link between small molecule presence and genetic selection in Saccharomyces cerevisiae.
    • Fused Gal4 DNA-binding domain with ligand-binding domains from nuclear receptors in the yeast strain PJ69-4A.
    • Grew yeast on selective plates containing known ligands to observe survival.

    Main Results:

    • Yeast survival was contingent on the presence of both a nuclear receptor and its corresponding ligand.
    • Mutagenesis was shown to enhance the sensitivity of this chemical complementation system.
    • The system demonstrated the principle of chemical complementation, extending genetic complementation.

    Conclusions:

    • The developed system enables chemical complementation, linking small molecule presence to genetic selection in yeast.
    • This approach can be extended to engineer nuclear receptors for diverse small molecules via directed evolution.
    • Facilitates metabolic engineering in yeast by providing a novel selection mechanism.