3Q41

Crystal structure of the GluN1 N-terminal domain (NTD)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Separation of Domain Contacts Is Required for Heterotetrameric Assembly of Functional NMDA Receptors.

Farina, A.N.Blain, K.Y.Maruo, T.Kwiatkowski, W.Choe, S.Nakagawa, T.

(2011) J Neurosci 31: 3565-3579

  • DOI: https://doi.org/10.1523/JNEUROSCI.6041-10.2011
  • Primary Citation of Related Structures:  
    3Q41

  • PubMed Abstract: 

    The precise knowledge of the subunit assembly process of NMDA receptors (NMDA-Rs) is essential to understand the receptor architecture and underlying mechanism of channel function. Because NMDA-Rs are obligatory heterotetramers requiring the GluN1 subunit, it is critical to investigate how GluN1 and GluN2 type subunits coassemble into tetramers. By combining approaches in cell biology, biochemistry, single particle electron microscopy, and x-ray crystallography, we report the mechanisms and phenotypes of mutant GluN1 subunits that are defective in receptor maturation. The T110A mutation in the N-terminal domain (NTD) of the GluN1 promotes heterodimerization between the NTDs of GluN1 and GluN2, whereas the Y109C mutation in the adjacent residue stabilizes the homodimer of the NTD of GluN1. The crystal structure of the NTD of GluN1 revealed the mechanism underlying the biochemical properties of these mutants. Effects of these mutations on the maturation of heteromeric NMDA-Rs were investigated using a receptor trafficking assay. Our results suggest that the NTDs of the GluN1 subunit initially form homodimers and the subsequent dimer dissociation is critical for forming heterotetrameric NMDA-Rs containing GluN2 subunits, defining a molecular determinant for receptor assembly. The domain arrangement of the dimeric NTD of GluN1 is unique among the ionotropic glutamate receptors and predicts that the structure and mechanism around the NTDs of NMDA-Rs are different from those of the homologous AMPA and kainate receptors.


  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamate [NMDA] receptor subunit zeta-1
A, B, C
384Rattus norvegicusMutation(s): 0 
Gene Names: Grin1Nmdar1
UniProt
Find proteins for P35439 (Rattus norvegicus)
Explore P35439 
Go to UniProtKB:  P35439
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35439
Glycosylation
Glycosylation Sites: 5Go to GlyGen: P35439-1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
H [auth A]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
M [auth B],
N [auth B],
O [auth B],
P [auth B],
Q [auth B],
T [auth C],
U [auth C],
V [auth C],
W [auth C],
X [auth C]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
I [auth A]
J [auth A]
K [auth A]
L [auth A]
R [auth B]
I [auth A],
J [auth A],
K [auth A],
L [auth A],
R [auth B],
S [auth B],
Y [auth C],
Z [auth C]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 164.679α = 90
b = 164.679β = 90
c = 147.258γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SHARPphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Database references, Derived calculations, Structure summary