3OEK: Crystal Structure Of Glun2d Ligand-binding Core In Complex With L- Aspartate

N-methyl-D-aspartate (NMDA) receptors belong to the family of ionotropic glutamate receptors that mediate a majority of excitatory synaptic transmission. One unique property of GluN1/GluN2D NMDA receptors is an unusually prolonged deactivation time course following the removal of L-glutamate. Here we show, using x-ray crystallography and electrophysiology, that the deactivation time course of GluN1/GluN2D receptors is influenced by the conformational variability of the ligand-binding domain (LBD) as well as the structure of the activating ligand. L-glutamate and L-CCG-IV induce significantly slower deactivation time courses compared with other agonists. Crystal structures of the isolated GluN2D LBD in complex with various ligands reveal that the binding of L-glutamate induces a unique conformation at the backside of the ligand-binding site in proximity to the region at which the transmembrane domain would be located in the intact receptors. These data suggest that the activity of the GluN1/GluN2D NMDA receptor is controlled distinctively by the endogenous neurotransmitter L-glutamate.
PDB ID: 3OEKDownload
MMDB ID: 90439
PDB Deposition Date: 2010/8/12
Updated in MMDB: 2017/09
Experimental Method:
x-ray diffraction
Resolution: 1.9  Å
Source Organism:
Similar Structures:
Biological Unit for 3OEK: monomeric; determined by author and by software (PISA)
Molecular Components in 3OEK
Label Count Molecule
Protein (1 molecule)
Glutamate [nmda] Receptor Subunit Epsilon-4(Gene symbol: Grin2d)
Molecule annotation
Chemical (1 molecule)
* Click molecule labels to explore molecular sequence information.

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