7TES image
Entry Detail
PDB ID:
7TES
EMDB ID:
Title:
Cryo-EM structure of GluN1b-2B NMDAR in complex with Fab5 in Non-active1 conformation
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2022-01-05
Release Date:
2022-03-02
Method Details:
Experimental Method:
Resolution:
4.70 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Glutamate receptor ionotropic, NMDA 1
Chain IDs:A, C
Chain Length:862
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:Glutamate receptor ionotropic, NMDA 2B
Chain IDs:B, D
Chain Length:883
Number of Molecules:2
Biological Source:Rattus norvegicus
Polymer Type:polypeptide(L)
Description:Fab5 heavy chain
Chain IDs:E (auth: H), G (auth: M)
Chain Length:221
Number of Molecules:2
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Description:Fab5 light chain
Chain IDs:F (auth: L), H (auth: N)
Chain Length:215
Number of Molecules:2
Biological Source:Mus musculus
Ligand Molecules
Primary Citation
Development and characterization of functional antibodies targeting NMDA receptors.
Nat Commun 13 923 923 (2022)
PMID: 35177668 DOI: 10.1038/s41467-022-28559-3

Abstact

N-methyl-D-aspartate receptors (NMDARs) are critically involved in basic brain functions and neurodegeneration as well as tumor invasiveness. Targeting specific subtypes of NMDARs with distinct activities has been considered an effective therapeutic strategy for neurological disorders and diseases. However, complete elimination of off-target effects of small chemical compounds has been challenging and thus, there is a need to explore alternative strategies for targeting NMDAR subtypes. Here we report identification of a functional antibody that specifically targets the GluN1-GluN2B NMDAR subtype and allosterically down-regulates ion channel activity as assessed by electrophysiology. Through biochemical analysis, x-ray crystallography, single-particle electron cryomicroscopy, and molecular dynamics simulations, we show that this inhibitory antibody recognizes the amino terminal domain of the GluN2B subunit and increases the population of the non-active conformational state. The current study demonstrates that antibodies may serve as specific reagents to regulate NMDAR functions for basic research and therapeutic objectives.

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