Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 91114.54 
• Atom Count: 5893 
• Residue Count: 778 
• Unique protein chains: 1

4OR2

Human class C G protein-coupled metabotropic glutamate receptor 1 in complex with a negative allosteric modulator

• DOI: 10.2210/pdb4OR2/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens, Escherichia coli
• Expression System: Spodoptera frugiperda
• Mutation(s): 3 


• Deposited: 2014-02-10 Released: 2014-03-19 
• Deposition Author(s): Wu, H., Wang, C., Gregory, K.J., Han, G.W., Cho, H.P., Xia, Y., Niswender, C.M., Katritch, V., Cherezov, V., Conn, P.J., Stevens, R.C., GPCR Network (GPCR)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.268 
• R-Value Work: 0.227 

Literature

Structure of a class C GPCR metabotropic glutamate receptor 1 bound to an allosteric modulator

Wu, H., Wang, C., Gregory, K.J., Han, G.W., Cho, H.P., Xia, Y., Niswender, C.M., Katritch, V., Meiler, J., Cherezov, V., Conn, P.J., Stevens, R.C.

(2014) Science 344: 58-64

• PubMed: 24603153 
• DOI: 10.1126/science.1249489


• PubMed Abstract: 
  

The excitatory neurotransmitter glutamate induces modulatory actions via the metabotropic glutamate receptors (mGlus), which are class C G protein-coupled receptors (GPCRs). We determined the structure of the human mGlu1 receptor seven-transmembrane (7TM) domain bound to a negative allosteric modulator, FITM, at a resolution of 2.8 angstroms. The modulator binding site partially overlaps with the orthosteric binding sites of class A GPCRs but is more restricted than most other GPCRs. We observed a parallel 7TM dimer mediated by cholesterols, which suggests that signaling initiated by glutamate's interaction with the extracellular domain might be mediated via 7TM interactions within the full-length receptor dimer. A combination of crystallography, structure-activity relationships, mutagenesis, and full-length dimer modeling provides insights about the allosteric modulation and activation mechanism of class C GPCRs.

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Organizational Affiliation: 

Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Soluble cytochrome b562, Metabotropic glutamate receptor 1	A, B	389	Homo sapiens, Escherichia coli This entity is chimeric	Mutation(s): 3  Gene Names: GRM1 (GPRC1A, MGLUR1), cybC
Membrane protein mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  G Protein-Coupled Receptors (GPCRs)	Protein:  Class C GPCR Metabotropic Glutamate Receptor 1 (mGlu1) with bound allosteric modulator
Find proteins for Q13255 (Homo sapiens) Go to Gene View: GRM1 Go to UniProtKB:  Q13255
Find proteins for P0ABE7 (Escherichia coli) Go to UniProtKB:  P0ABE7

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
OLC	A, B	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate 1-Oleoyl-R-glycerol C21 H40 O4 RZRNAYUHWVFMIP-GDCKJWNLSA-N
PO4	B	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
OLA	A	OLEIC ACID C18 H34 O2 ZQPPMHVWECSIRJ-KTKRTIGZSA-N
FM9	A, B	4-fluoro-N-methyl-N-{4-[6-(propan-2-ylamino)pyrimidin-4-yl]-1,3-thiazol-2-yl}benzamide C18 H18 F N5 O S WIVGIKIKQHUFOD-UHFFFAOYSA-N
CLR	A, B	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
FM9	IC50: 5.1 - >10000 nM (100) BINDINGDB
FM9	Ki: 5.4 nM (99) BINDINGDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.268 
• R-Value Work: 0.227 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 67.361	α = 90.00
b = 86.552	β = 90.00
c = 168.277	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data scaling
AutoSol	phasing
HKL-2000	data reduction
BUSTER	refinement
Blu-Ice	data collection

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-02-10 
• Released Date: 2014-03-19 
• Deposition Author(s): Wu, H., Wang, C., Gregory, K.J., Han, G.W., Cho, H.P., Xia, Y., Niswender, C.M., Katritch, V., Cherezov, V., Conn, P.J., Stevens, R.C., GPCR Network (GPCR)

Revision History 

• Version 1.0: 2014-03-19
  Type: Initial release
• Version 1.1: 2014-03-26
  Type: Structure summary
• Version 1.2: 2015-02-04
  Type: Derived calculations
• Version 1.3: 2015-04-01
  Type: Database references
• Version 1.4: 2017-08-16
  Type: Refinement description, Source and taxonomy
• Version 1.5: 2017-11-22
  Type: Refinement description