Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 110.52 kDa 
• Atom Count: 7120 
• Residue Count: 896 
• Unique protein chains: 1

1EWV

CRYSTAL STRUCTURE OF METABOTROPIC GLUTAMATE RECEPTOR SUBTYPE 1 LIGAND FREE FORM II

• DOI: 10.2210/pdb1EWV/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Rattus norvegicus
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2000-04-27 Released: 2000-12-18 
• Deposition Author(s): Kunishima, N., Shimada, Y., Tsuji, Y., Jingami, H., Morikawa, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 4.00 Å
• R-Value Free: 0.328 
• R-Value Work: 0.254 

Literature

Structural basis of glutamate recognition by a dimeric metabotropic glutamate receptor.

Kunishima, N., Shimada, Y., Tsuji, Y., Sato, T., Yamamoto, M., Kumasaka, T., Nakanishi, S., Jingami, H., Morikawa, K.

(2000) Nature 407: 971-977

• PubMed: 11069170 
• DOI: 10.1038/35039564
• Primary Citation of Related Structures:  
  1EWV, 1EWT, 1EWK


• PubMed Abstract: 
  

The metabotropic glutamate receptors (mGluRs) are key receptors in the modulation of excitatory synaptic transmission in the central nervous system. Here we have determined three different crystal structures of the extracellular ligand-binding region of mGluR1--in a complex with glutamate and in two unliganded forms. They all showed disulphide-linked homodimers, whose 'active' and 'resting' conformations are modulated through the dimeric interface by a packed alpha-helical structure. The bi-lobed protomer architectures flexibly change their domain arrangements to form an 'open' or 'closed' conformation. The structures imply that glutamate binding stabilizes both the 'active' dimer and the 'closed' protomer in dynamic equilibrium. Movements of the four domains in the dimer are likely to affect the separation of the transmembrane and intracellular regions, and thereby activate the receptor. This scheme in the initial receptor activation could be applied generally to G-protein-coupled neurotransmitter receptors that possess extracellular ligand-binding sites.

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Organizational Affiliation: 

Department of Structural Biology, Biomolecular Engineering Research Institute, Suita, Osaka, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
METABOTROPIC GLUTAMATE RECEPTOR SUBTYPE 1	A, B	490	Rattus norvegicus	Mutation(s): 0  Gene Names: Grm1, Gprc1a, Mglur1
Find proteins for P23385 (Rattus norvegicus) Explore P23385  Go to UniProtKB:  P23385

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 4.00 Å
• R-Value Free: 0.328 
• R-Value Work: 0.254 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 84.79	α = 90
b = 94.53	β = 113.2
c = 95.45	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-04-27 
• Released Date: 2000-12-18 
Deposition Author(s): Kunishima, N., Shimada, Y., Tsuji, Y., Jingami, H., Morikawa, K.

Revision History 

• Version 1.0: 2000-12-18
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance