3TZA

Crystal structure of the GluA2 ligand-binding domain (S1S2J) in complex with the antagonist (S)-2-amino-3-(2-(2-carboxyethyl)-5-chloro-4-nitrophenyl)propionic acid at 1.9A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A new phenylalanine derivative acts as an antagonist at the AMPA receptor GluA2 and introduces partial domain closure: synthesis, resolution, pharmacology, and crystal structure

Szymanska, E.Frydenvang, K.Contreras-Sanz, A.Pickering, D.S.Frola, E.Serafimoska, Z.Nielsen, B.Kastrup, J.S.Johansen, T.N.

(2011) J.Med.Chem. 54: 7289-7298

  • DOI: 10.1021/jm200862h

  • PubMed Abstract: 
  • In order to map out molecular determinants for competitive blockade of AMPA receptor subtypes, a series of 2-carboxyethylphenylalanine derivatives has been synthesized and pharmacologically characterized in vitro. One compound in this series, (RS)-3h ...

    In order to map out molecular determinants for competitive blockade of AMPA receptor subtypes, a series of 2-carboxyethylphenylalanine derivatives has been synthesized and pharmacologically characterized in vitro. One compound in this series, (RS)-3h, showed micromolar affinity for GluA1(o) and GluA2(R)(o) receptors with an approximately 4-fold preference for GluA1/2 vs GluA3/4. In TEVC electrophysiological experiments (RS)-3h competitively antagonized GluA2(Q)(i) receptors. The X-ray structure of the active enantiomer (S)-3h in complex with GluA2-S1S2J showed a domain closure around 8°. Even though the nitro and the carboxyethyl groups of (S)-3h were both anchored to Tyr702 through a water H-bond network, these interactions only induced weak subtype selectivity. In spite of the fact that (S)-3h induced a domain closure close to that observed for partial agonists, it did not produce agonist responses at GluA2 receptors under nondesensitizing conditions. 2-Carboxyethylphenylalanine derivatives provide a new synthetic scaffold for the introduction of substituents that could lead to AMPA receptor subtype-selective ligands.


    Organizational Affiliation

    Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, 2 Universitetsparken, DK-2100 Copenhagen, Denmark.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamate receptor 2,Glutamate receptor 2
A, B
263Rattus norvegicusGene Names: Gria2 (Glur2)
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
TZG
Query on TZG

Download SDF File 
Download CCD File 
A, B
(S)-2-amino-3-(2-(2-carboxyethyl)-5-chloro-4-nitrophenyl)propionic acid
C12 H13 Cl N2 O6
DRCLPFURMHGQPC-VIFPVBQESA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TZGIC50: 3400 nM BINDINGMOAD
TZGKi: 3150 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.172 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 48.722α = 90.00
b = 61.835β = 94.09
c = 92.921γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-10-26
    Type: Initial release
  • Version 1.1: 2013-06-26
    Type: Database references
  • Version 1.2: 2017-06-14
    Type: Database references, Source and taxonomy, Structure summary