Three-Dimensional Structure of the Ligand-Binding Core of GluR2 in Complex with the Agonist (S)-ATPA: Implications for Receptor Subunit Selectivity.Lunn, M.L., Hogner, A., Stensbol, T.B., Gouaux, E., Egebjerg, J., Kastrup, J.S.
(2003) J.Med.Chem. 46: 872-875
- PubMed: 12593667
- DOI: 10.1021/jm021020+
- Primary Citation of Related Structures:
- Also Cited By: 3PD9
- PubMed Abstract:
- Probing the ligand binding domain of the GluR2 receptor by proteolysis and deletion mutagenesis defines domain boundaries and yields a crystallizable construct.
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Two X-ray structures of the GluR2 ligand-binding core in complex with (S)-2-amino-3-(5-tert-butyl-3-hydroxy-4-isoxazolyl)propionic acid ((S)-ATPA) have been determined with and without Zn(2+) ions. (S)-ATPA induces a domain closure of ca. 21 degrees ...
Two X-ray structures of the GluR2 ligand-binding core in complex with (S)-2-amino-3-(5-tert-butyl-3-hydroxy-4-isoxazolyl)propionic acid ((S)-ATPA) have been determined with and without Zn(2+) ions. (S)-ATPA induces a domain closure of ca. 21 degrees compared to the apo form. The tert-butyl moiety of (S)-ATPA is buried in a partially hydrophobic pocket and forces the ligand into the glutamate-like binding mode. The structures provide new insight into the molecular basis of agonist selectivity between AMPA and kainate receptors.
Department of Medicinal Chemistry, Pharmaceutical University of Denmark, Universitetsparken 2, DK-2100 Copenhagen, Denmark.