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Updated: Jun 10, 2026
10:51
Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
Published on: November 15, 2013
Structural and functional insights into nuclear receptor signaling.
Advanced Drug Delivery Reviews
|August 21, 2010
Summary
Nuclear receptors are key transcriptional factors regulating gene expression. Their ligand-binding domains (LBDs) exhibit structural flexibility, enabling specific interactions with diverse ligands to control cellular responses.
Area of Science:
- Molecular Biology
- Structural Biology
- Genetics
Background:
- Nuclear receptors are crucial transcriptional factors with conserved DNA-binding (DBD) and ligand-binding domains (LBDs).
- The LBD is central to ligand-mediated regulation of nuclear receptor activity.
- Hundreds of crystal structures illuminate ligand binding and regulation mechanisms.
Purpose of the Study:
- To analyze the structural basis of ligand binding and specificity in nuclear receptor LBDs.
- To understand the role of LBD structural features in ligand-mediated transcriptional regulation.
Main Methods:
- Structural comparison and analysis of hundreds of nuclear receptor crystal structures.
- Examination of ligand-binding pocket characteristics, including size and shape.
- Investigation of the AF-2 helix conformational flexibility in response to ligand binding.
Main Results:
- Nuclear receptor LBDs share a conserved fold, but ligand-binding pockets show significant variation.
- Pocket size, shape, and plasticity determine ligand binding affinity and specificity.
- AF-2 helix flexibility enables sensing of agonists/antagonists and recruitment of co/corepressors.
Conclusions:
- The structural plasticity of nuclear receptor LBDs, particularly the ligand-binding pocket, is critical for diverse ligand recognition.
- Conformational changes in the AF-2 helix mediate ligand-dependent recruitment of regulatory proteins, controlling gene transcription.
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