4UQQ

Electron density map of GluK2 desensitized state in complex with 2S,4R-4-methylglutamate


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural Mechanism of Glutamate Receptor Activation and Desensitization

Meyerson, J.R.Kumar, J.Chittori, S.Rao, P.Pierson, J.Bartesaghi, A.Mayer, M.L.Subramaniam, S.

(2014) Nature 514: 328

  • DOI: 10.1038/nature13603
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ionotropic glutamate receptors are ligand-gated ion channels that mediate excitatory synaptic transmission in the vertebrate brain. To gain a better understanding of how structural changes gate ion flux across the membrane, we trapped rat AMPA (α-ami ...

    Ionotropic glutamate receptors are ligand-gated ion channels that mediate excitatory synaptic transmission in the vertebrate brain. To gain a better understanding of how structural changes gate ion flux across the membrane, we trapped rat AMPA (α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid) and kainate receptor subtypes in their major functional states and analysed the resulting structures using cryo-electron microscopy. We show that transition to the active state involves a 'corkscrew' motion of the receptor assembly, driven by closure of the ligand-binding domain. Desensitization is accompanied by disruption of the amino-terminal domain tetramer in AMPA, but not kainate, receptors with a two-fold to four-fold symmetry transition in the ligand-binding domains in both subtypes. The 7.6 Å structure of a desensitized kainate receptor shows how these changes accommodate channel closing. These findings integrate previous physiological, biochemical and structural analyses of glutamate receptors and provide a molecular explanation for key steps in receptor gating.


    Organizational Affiliation

    Laboratory of Cell Biology, Center for Cancer Research, NCI, NIH, Bethesda, Maryland 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTAMATE RECEPTOR IONOTROPIC, KAINATE 2
A, B, C, D
882Rattus norvegicusMutation(s): 2 
Gene Names: Grik2 (Glur6)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Other Ion Channels
Protein: 
GluK2 Glutamate receptor (Kainate-subtype) in desensitized state with bound 2S,4R-4-methylglutamate
Find proteins for P42260 (Rattus norvegicus)
Go to UniProtKB:  P42260
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLU
Query on GLU

Download SDF File 
Download CCD File 
A, B, C, D
GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-08-13
    Type: Initial release
  • Version 1.1: 2014-08-27
    Type: Database references
  • Version 1.2: 2014-10-22
    Type: Database references
  • Version 1.3: 2017-08-02
    Type: Data collection