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Genetic selection for genes encoding sequence-specific DNA-binding proteins.

S J Elledge1, P Sugiono, L Guarente

  • 1Department of Biochemistry, Stanford University School of Medicine, CA 94305.

Proceedings of the National Academy of Sciences of the United States of America
|May 1, 1989
PubMed
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This study introduces a novel genetic selection method to identify genes for sequence-specific DNA-binding proteins. The technique enables the isolation of specific DNA-binding activities from complex libraries, aiding in molecular biology research.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • Cloning genes for sequence-specific DNA-binding proteins is challenging.
  • Existing methods may lack specificity or efficiency.

Purpose of the Study:

  • To develop a genetic selection method for efficiently cloning genes encoding sequence-specific DNA-binding proteins.
  • To enable the isolation of specific DNA-binding activities from libraries.

Main Methods:

  • Engineered synthetic promoters (conII derivatives) with specific DNA-binding sites.
  • Utilized transcriptional interference of an adjacent drug-resistance gene (aadA).
  • Selected for clones expressing DNA-binding proteins that alleviate interference.

Main Results:

Related Experiment Videos

  • Demonstrated that sequence-specific DNA-binding proteins can repress the engineered promoters.
  • Showed alleviation of transcriptional interference of the aadA gene.
  • Achieved drug resistance in cells expressing the correct DNA-binding protein, confirming successful selection.

Conclusions:

  • The described genetic selection method is effective for cloning genes of sequence-specific DNA-binding proteins.
  • This approach facilitates the study of proteins with specific DNA-binding activities.
  • The method offers a powerful tool for molecular biology and genetic engineering.