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Related Experiment Videos

Core promoter binding by histone-like TAF complexes.

Hanshuang Shao1, Merav Revach, Sandra Moshonov

  • 1Department of Biological Chemistry, The Weizmann Institute of Science, Rehovot 76100, Israel.

Molecular and Cellular Biology
|December 17, 2004
PubMed
Summary
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TFIID

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Chromatin Biology

Background:

  • TFIID (TATA-binding protein-associated factors) is crucial for core promoter recognition.
  • TAF histone fold domains (HFDs) lack histone DNA-contacting residues, leaving their role in DNA binding unclear.

Purpose of the Study:

  • To investigate the DNA binding activity of TAF9, TAF6, TAF4b, and TAF12.
  • To determine the contribution of TAF HFDs to core promoter DNA binding.

Main Methods:

  • Examined DNA binding activity of individual TAFs (TAF9, TAF6, TAF4b, TAF12).
  • Mapped DNA binding domains to conserved regions.
  • Assessed DNA binding of TAF pairs and a histone-like octamer complex.

Main Results:

Related Experiment Videos

  • Each TAF exhibited intrinsic DNA binding activity near or within its HFD.
  • HFD-mediated interactions enhanced DNA binding for TAF pairs and the octamer complex.
  • HFDs stimulated sequence-specific DNA binding for TAF6 and TAF9.

Conclusions:

  • TAF HFDs possess intrinsic DNA binding capabilities.
  • HFD-mediated interactions are essential for efficient and specific core promoter recognition by TFIID components.