5JEI

Crystal structure of the GluA2 LBD in complex with FW


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.23 Å
  • R-Value Free: 0.147 
  • R-Value Work: 0.121 
  • R-Value Observed: 0.122 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

Mechanism of partial agonism in AMPA-type glutamate receptors.

Salazar, H.Eibl, C.Chebli, M.Plested, A.

(2017) Nat Commun 8: 14327-14327

  • DOI: https://doi.org/10.1038/ncomms14327
  • Primary Citation of Related Structures:  
    5JEI

  • PubMed Abstract: 

    Neurotransmitters trigger synaptic currents by activating ligand-gated ion channel receptors. Whereas most neurotransmitters are efficacious agonists, molecules that activate receptors more weakly-partial agonists-also exist. Whether these partial agonists have weak activity because they stabilize less active forms, sustain active states for a lesser fraction of the time or both, remains an open question. Here we describe the crystal structure of an α-amino-3-hydroxy-5-methyl-4-isoxazolepropionate receptor (AMPAR) ligand binding domain (LBD) tetramer in complex with the partial agonist 5-fluorowillardiine (FW). We validate this structure, and others of different geometry, using engineered intersubunit bridges. We establish an inverse relation between the efficacy of an agonist and its promiscuity to drive the LBD layer into different conformations. These results suggest that partial agonists of the AMPAR are weak activators of the receptor because they stabilize multiple non-conducting conformations, indicating that agonism is a function of both the space and time domains.


  • Organizational Affiliation

    Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, 13125 Berlin, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamate receptor 2,Glutamate receptor 2264Rattus norvegicusMutation(s): 0 
Gene Names: Gria2Glur2
UniProt
Find proteins for P19491 (Rattus norvegicus)
Explore P19491 
Go to UniProtKB:  P19491
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19491
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 9 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FWD
Query on FWD

Download Ideal Coordinates CCD File 
B [auth A]2-AMINO-3-(5-FLUORO-2,4-DIOXO-3,4-DIHYDRO-2H-PYRIMIDIN-1-YL)-PROPIONIC ACID
C7 H8 F N3 O4
DBWPFHJYSTVBCZ-BYPYZUCNSA-N
ETE
Query on ETE

Download Ideal Coordinates CCD File 
J [auth A],
K [auth A]
2-{2-[2-2-(METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL
C9 H20 O5
ZNYRFEPBTVGZDN-UHFFFAOYSA-N
PG4
Query on PG4

Download Ideal Coordinates CCD File 
E [auth A],
H [auth A]
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
TOE
Query on TOE

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G [auth A]2-[2-(2-METHOXY-ETHOXY)-ETHOXY]-ETHOXYL
C7 H16 O4
JLGLQAWTXXGVEM-UHFFFAOYSA-N
PG0
Query on PG0

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I [auth A]2-(2-METHOXYETHOXY)ETHANOL
C5 H12 O3
SBASXUCJHJRPEV-UHFFFAOYSA-N
PEG
Query on PEG

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F [auth A],
L [auth A],
N [auth A]
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
PO4
Query on PO4

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C [auth A],
D [auth A]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
EDO
Query on EDO

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M [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
NA
Query on NA

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O [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.23 Å
  • R-Value Free: 0.147 
  • R-Value Work: 0.121 
  • R-Value Observed: 0.122 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.465α = 90
b = 44.425β = 90
c = 47.276γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
Cootmodel building
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyPL619.1
European Research CouncilGermany647895
Austrian Science FundAustriaJ3682-B21
HFSPFrance--

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-22
    Type: Initial release
  • Version 1.1: 2017-03-01
    Changes: Database references
  • Version 1.2: 2017-09-06
    Changes: Author supporting evidence
  • Version 1.3: 2018-01-31
    Changes: Database references
  • Version 1.4: 2024-01-10
    Changes: Data collection, Database references, Refinement description
  • Version 1.5: 2024-11-13
    Changes: Structure summary