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Updated: Jun 11, 2025

Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
Published on: November 15, 2013
Nuclear Receptor Interdomain Communication is Mediated by the Hinge with Ligand Specificity
Saurov Hazarika1, Tracy Yu2, Arumay Biswas1
1Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA.
Ligand binding to nuclear receptors like farnesoid X receptor (FXR) causes domain rearrangement. Computational modeling and experiments reveal the hinge region is crucial for this interdomain communication.
Area of Science:
- Molecular biology
- Structural biology
- Computational chemistry
Background:
- Nuclear receptors are transcription factors regulated by ligand binding.
- Interdomain communication in nuclear receptors is poorly understood due to challenges in full-length structural studies.
Purpose of the Study:
- To investigate the structural dynamics and interdomain communication of the full-length farnesoid X receptor (FXR).
- To elucidate the role of the hinge region in mediating ligand-induced conformational changes.
Main Methods:
- Computational modeling, including extended molecular dynamics (>10 microseconds) and enhanced sampling simulations.
- Protein-protein interaction assays to experimentally validate computational findings.
Main Results:
- Ligand binding selectively induces domain rearrangement in FXR, leading to interdomain contact.
- The hinge region plays a critical role in mediating these ligand-induced interdomain contacts.
- Computational and experimental data reveal novel aspects of FXR structure and function.
Conclusions:
- Ligand-induced interdomain communication in FXR involves specific domain rearrangements mediated by the hinge region.
- This study provides a framework for characterizing other full-length nuclear receptors.
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