4JWX

GluN2A ligand-binding core in complex with propyl-NHP5G


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural determinants of agonist efficacy at the glutamate binding site of N-methyl-d-aspartate receptors.

Hansen, K.B.Tajima, N.Risgaard, R.Perszyk, R.E.Jorgensen, L.Vance, K.M.Ogden, K.K.Clausen, R.P.Furukawa, H.Traynelis, S.F.

(2013) Mol.Pharmacol. 84: 114-127

  • DOI: 10.1124/mol.113.085803
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • N-methyl-d-aspartate (NMDA) receptors are ligand-gated ion channels assembled from GluN1 and GluN2 subunits. We used a series of N-hydroxypyrazole-5-glycine (NHP5G) partial agonists at the GluN2 glutamate binding site as tools to study activation of ...

    N-methyl-d-aspartate (NMDA) receptors are ligand-gated ion channels assembled from GluN1 and GluN2 subunits. We used a series of N-hydroxypyrazole-5-glycine (NHP5G) partial agonists at the GluN2 glutamate binding site as tools to study activation of GluN1/GluN2A and GluN1/GluN2D NMDA receptor subtypes. Using two-electrode voltage-clamp electrophysiology, fast-application patch-clamp, and single-channel recordings, we show that propyl- and ethyl-substituted NHP5G agonists have a broad range of agonist efficacies relative to the full agonist glutamate (<1-72%). Crystal structures of the agonist binding domains (ABDs) of GluN2A and GluN2D do not reveal any differences in the overall domain conformation induced by binding of the full agonist glutamate or the partial agonist propyl-NHP5G, which is strikingly different from ABD structures of 2-amino-3-(3-hydroxy-5-methylisoxazol-4-yl)propanoate (AMPA) and kainate receptors bound to full and partial agonists. Subsequent evaluation of relative NHP5G agonist efficacy at GluN2A-GluN2D chimeric subunits implicates the amino-terminal domain (ATD) as a strong determinant of agonist efficacy, suggesting that interdomain interactions between the ABD and the ATD may be a central element in controlling the manner by which agonist binding leads to channel opening. We propose that variation in the overall receptor conformation, which is strongly influenced by the nature of interdomain interactions in resting and active states, mediates differences in agonist efficacy and partial agonism at the GluN2 subunits.


    Organizational Affiliation

    Department of Pharmacology, Emory University School of Medicine, 1510 Clifton Road, Rollins Research Center, Atlanta, GA 30322, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GluN2A
A
280Rattus norvegicusMutation(s): 0 
Gene Names: Grin2a
Find proteins for Q00959 (Rattus norvegicus)
Go to UniProtKB:  Q00959
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1N4
Query on 1N4

Download SDF File 
Download CCD File 
A
(2R)-amino(1-hydroxy-4-propyl-1H-pyrazol-5-yl)ethanoic acid
C8 H13 N3 O3
SSPXLOGHCJIQFQ-ZCFIWIBFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.160 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 52.031α = 90.00
b = 52.031β = 90.00
c = 198.823γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data collection
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-29
    Type: Initial release
  • Version 1.1: 2013-07-17
    Type: Database references