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Vitamin D receptor: ligand recognition and allosteric network
Keiko Yamamoto1, Daijiro Abe, Nobuko Yoshimoto
1Institute of Biomaterials and Bioengineering and School of Biomedical Sciences, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan. yamamoto.mr@tmd.ac.jp
Journal of Medicinal Chemistry
|February 17, 2006
Summary
This study reveals how ligands influence nuclear receptor function. Alanine scanning identified specific interactions within the vitamin D receptor
Area of Science:
- Nuclear Receptor Biology
- Molecular Pharmacology
Background:
- Nuclear receptors are key regulators of gene expression.
- Understanding ligand interactions is crucial for drug development.
Purpose of the Study:
- To investigate allosteric effects of ligands on nuclear receptor function.
- To elucidate ligand-specific interactions within the vitamin D receptor ligand-binding pocket.
Main Methods:
- Exhaustive alanine scanning mutational analysis (ASMA) of the human vitamin D receptor ligand-binding pocket (LBP).
- Two-dimensional (2D) ASMA was employed using 10 characteristic ligands (agonists, partial agonists, antagonist).
Main Results:
- Identified the critical role of amino acid residues lining the LBP.
- Demonstrated ligand-specific interactions dictating transactivation potency.
- Revealed relationships between ligand binding and transcriptional activity.
Conclusions:
- Proposed a ligand-mediated allosteric network for signal transmission.
- Highlighted the importance of ligand-specific protein interactions in receptor function.
- Linked allosteric network to statistical coupling analysis findings.