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Updated: Jun 8, 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
[Synthetic ligands for nuclear receptors]
1IMCB, University of Tokyo.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|October 20, 2010
Summary
Steroid hormones activate nuclear receptors, which are transcription factors controlling gene expression. Ligand binding alters receptor structure, modulating interactions with co-regulators to control gene activity.
Area of Science:
- Molecular Biology
- Genetics
- Endocrinology
Context:
- Nuclear receptors are crucial transcription factors that regulate gene expression in response to ligand binding.
- These receptors belong to a large gene superfamily with conserved structural domains.
Purpose:
- To elucidate the mechanism by which fat-soluble ligands, such as steroid hormones, activate nuclear receptors.
- To explain how ligand binding induces structural changes in nuclear receptors, affecting transcriptional regulation.
Summary:
- Fat-soluble ligands bind to the ligand-binding domain of nuclear receptors, inducing conformational changes.
- These structural alterations modulate the recruitment of transcriptional co-regulators, switching from co-repressors to co-activators.
- Ligand-dependent structural changes also affect the N-terminal domains, enhancing co-activator accessibility and transcriptional activity.
- Synthetic agonists and antagonists can mimic or block these ligand-induced structural changes, impacting pharmacological outcomes.
Impact:
- Provides a detailed understanding of nuclear receptor activation and its role in gene regulation.
- Highlights the structural basis for ligand-dependent transcriptional control.
- Informs the development of novel therapeutic strategies targeting nuclear receptor pathways.
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