6GIV

Structure of GluA2-N775S ligand-binding domain (S1S2J) in complex with glutamate and Rubidium Bromide at 1.75 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Nanoscale Mobility of the Apo State and TARP Stoichiometry Dictate the Gating Behavior of Alternatively Spliced AMPA Receptors.

Dawe, G.B.Kadir, M.F.Venskutonyte, R.Perozzo, A.M.Yan, Y.Alexander, R.P.D.Navarrete, C.Santander, E.A.Arsenault, M.Fuentes, C.Aurousseau, M.R.P.Frydenvang, K.Barrera, N.P.Kastrup, J.S.Edwardson, J.M.Bowie, D.

(2019) Neuron 102: 976

  • DOI: 10.1016/j.neuron.2019.03.046
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Neurotransmitter-gated ion channels are allosteric proteins that switch on and off in response to agonist binding. Most studies have focused on the agonist-bound, activated channel while assigning a lesser role to the apo or resting state. Here, we s ...

    Neurotransmitter-gated ion channels are allosteric proteins that switch on and off in response to agonist binding. Most studies have focused on the agonist-bound, activated channel while assigning a lesser role to the apo or resting state. Here, we show that nanoscale mobility of resting α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type ionotropic glutamate receptors (AMPA receptors) predetermines responsiveness to neurotransmitter, allosteric anions and TARP auxiliary subunits. Mobility at rest is regulated by alternative splicing of the flip/flop cassette of the ligand-binding domain, which controls motions in the distant AMPA receptor N-terminal domain (NTD). Flip variants promote moderate NTD movement, which establishes slower channel desensitization and robust regulation by anions and auxiliary subunits. In contrast, greater NTD mobility imparted by the flop cassette acts as a master switch to override allosteric regulation. In AMPA receptor heteromers, TARP stoichiometry further modifies these actions of the flip/flop cassette generating two functionally distinct classes of partially and fully TARPed receptors typical of cerebellar stellate and Purkinje cells.


    Organizational Affiliation

    Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 1Y6, Canada. Electronic address: derek.bowie@mcgill.ca.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamate receptor 2
A
264Rattus norvegicusMutation(s): 1 
Gene Names: Gria2Glur2
Find proteins for P19491 (Rattus norvegicus)
Go to UniProtKB:  P19491
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLU
Query on GLU

Download CCD File 
A
GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BR
Query on BR

Download CCD File 
A
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.956α = 90
b = 47.513β = 110.16
c = 49.81γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-05-15
    Type: Initial release
  • Version 1.1: 2019-06-19
    Changes: Data collection, Database references