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Related Experiment Videos

p53 binds to the TATA-binding protein-TATA complex

D W Martin1, R M Muñoz, M A Subler

  • 1Department of Microbiology, University of Texas Health Science Center, San Antonio 78284.

The Journal of Biological Chemistry
|June 25, 1993
PubMed
Summary
This summary is machine-generated.

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Wild-type and mutant p53 directly interact with the TATA-binding protein (TBP). This interaction allows the p53-TBP complex to bind the TATA box, suggesting functional differences arise after TBP binding.

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Protein Interactions

Background:

  • p53 protein, both wild-type and mutant forms, influences gene transcription.
  • Wild-type p53 activates specific promoters, while mutant p53 can also activate transcription from certain promoters.
  • These activities suggest p53 interacts with general transcription factors.

Purpose of the Study:

  • To investigate the interaction between p53 and the TATA-binding protein (TBP).
  • To determine if p53 directly binds to TBP.
  • To assess the DNA-binding capability of the p53-TBP complex.

Main Methods:

  • Co-immunoprecipitation assays using p53 antibodies and Protein A-agarose.
  • Direct interaction confirmation via protein blot assays.

Related Experiment Videos

  • Gel retention analysis to study DNA-binding properties.

    • Main Results:

    • Human and yeast TBP were found to interact with human p53.
    • Wild-type murine p53 also interacted with human TBP.
    • Protein blot assays confirmed a direct interaction between p53 and TBP.
    • The p53-TBP complex, including both wild-type and mutant p53, successfully bound to the TATA box.

    Conclusions:

    • p53 (wild-type and mutant) directly interacts with TBP.
    • The p53-TBP complex binds to the TATA box, indicating similar DNA-binding capabilities.
    • Functional differences between wild-type and mutant p53 may depend on the subsequent p53-TBP-TATA complex formation, not TBP binding itself.