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Related Experiment Videos

Recognition and accommodation at the androgen receptor coactivator binding interface.

Eugene Hur1, Samuel J Pfaff, E Sturgis Payne

  • 1Graduate Group in Biophysics, University of California, San Francisco, California, USA.

Plos Biology
|August 26, 2004
PubMed
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Researchers identified key peptide motifs that interact with the androgen receptor (AR). This discovery explains how AR binds to coactivators, offering new strategies for prostate cancer drug development.

Area of Science:

  • Molecular Biology
  • Structural Biology
  • Cancer Research

Background:

  • Prostate cancer is a significant cause of male mortality, driven by the androgen receptor (AR).
  • AR exhibits unique coactivator binding preferences compared to other nuclear receptors, utilizing aromatic-rich motifs.
  • Aberrant AR coactivator interactions, including with canonical motifs, contribute to prostate cancer progression.

Purpose of the Study:

  • To elucidate the molecular basis of AR's unusual coactivator selectivity.
  • To identify a comprehensive set of peptide motifs that bind to the AR.
  • To provide a structural framework for designing AR-targeting therapeutics.

Main Methods:

  • Phage display was employed to generate a library of peptides interacting with the AR.

Related Experiment Videos

  • Binding affinities of selected peptides were quantified.
  • X-ray crystallography was used to determine the structures of AR in complex with various coactivator motifs.

    • Main Results:

    • A complete set of peptide motifs interacting with AR was identified.
    • Structural analysis revealed a dynamic AR coactivator binding interface.
    • The AR interface accommodates both AR-specific aromatic-rich and canonical leucine-rich motifs through induced fit.

    Conclusions:

    • The study elucidates the structural mechanisms behind AR's dual coactivator binding.
    • The findings explain how AR can interact with diverse coactivator motifs.
    • This provides a foundation for developing novel antagonists targeting AR coactivator interactions for prostate cancer treatment.