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Related Experiment Videos

Interactions between yeast TFIIIB components

J Huet1, C Conesa, N Manaud

  • 1Service de Biochimie et Génétique Moléculaire, CEA-Saclay, Gif sur Yvette, France.

Nucleic Acids Research
|June 25, 1994
PubMed
Summary
This summary is machine-generated.

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Yeast transcription factor TFIIIB, essential for gene transcription, comprises TATA-binding protein (TBP) and associated factors. Each TFIIIB component plays a crucial role in DNA binding and RNA polymerase recruitment for gene expression.

Area of Science:

  • Molecular Biology
  • Gene Transcription
  • Protein-DNA Interactions

Background:

  • Yeast transcription factor TFIIIB is a crucial multi-component complex.
  • TFIIIB consists of TATA-binding protein (TBP) and associated factors TFIIIB70 and B".

Purpose of the Study:

  • To investigate the subunit interactions and functional roles of yeast TFIIIB components.
  • To elucidate the mechanism of TFIIIB in transcription initiation.

Main Methods:

  • Affinity chromatography to remove TFIIIB70.
  • Gel filtration and ion-exchange chromatography for protein separation.
  • In vitro transcription assays using recombinant proteins and purified fractions.

Main Results:

Related Experiment Videos

  • TFIIIB70 could be selectively removed, separating TBP and B".
  • Direct binding of TBP to TFIIIB70 was observed in the absence of DNA.
  • TBP is essential for basal transcription of tRNA genes.
  • TFIIIB70, TBP, and B" activity are required for TFIIIC-independent U6 RNA gene transcription.

    • Conclusions:

    • Each component of TFIIIB has a distinct and essential role in transcription.
    • TFIIIB components are involved in DNA binding and RNA polymerase recruitment.
    • Understanding TFIIIB structure and function is key to deciphering gene regulation.