8XLL image
Entry Detail
PDB ID:
8XLL
EMDB ID:
Keywords:
Title:
Structure of the native 2-oxoglutarate dehydrogenase complex (OGDHC) in the adult cortex and hippocampus
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2023-12-26
Release Date:
2025-02-05
Method Details:
Experimental Method:
Resolution:
3.10 Å
Aggregation State:
TISSUE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Dihydrolipoyllysine-residue succinyltransferase component of 2-oxoglutarate dehydrogenase complex, mitochondrial
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q (auth: R), R (auth: S), S (auth: T), T (auth: U), U (auth: V), V (auth: W), W (auth: X), X (auth: Y)
Chain Length:216
Number of Molecules:24
Biological Source:Rattus norvegicus
Ligand Molecules
Primary Citation
Assembly and architecture of endogenous NMDA receptors in adult cerebral cortex and hippocampus.
Cell 188 1198 1207.e13 (2025)
PMID: 39855198 DOI: 10.1016/j.cell.2025.01.004

Abstact

The cerebral cortex and hippocampus are crucial brain regions for learning and memory, which depend on activity-induced synaptic plasticity involving N-methyl-ᴅ-aspartate receptors (NMDARs). However, subunit assembly and molecular architecture of endogenous NMDARs (eNMDARs) in the brain remain elusive. Using conformation- and subunit-dependent antibodies, we purified eNMDARs from adult rat cerebral cortex and hippocampus. Three major subtypes of GluN1-N2A-N2B, GluN1-N2B, and GluN1-N2A eNMDARs were resolved by cryoelectron microscopy (cryo-EM) at the resolution up to 4.2 Å. The particle ratio of these three subtypes was 9:7:4, indicating that about half of GluN2A and GluN2B subunits are incorporated into the tri-heterotetramers. Structural analysis revealed the asymmetric architecture of the GluN1-N2A-N2B receptor throughout the extracellular to the transmembrane layers. Moreover, the conformational variations between GluN1-N2B and GluN1-N2A-N2B receptors revealed the distinct biophysical properties across different eNMDAR subtypes. Our findings imply the structural and functional complexity of eNMDARs and shed light on structure-based therapeutic design targeting these eNMDARs in vivo.

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