Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction | Predict Membrane 

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: 91.11 kDa 
• Atom Count: 5906 
• Modelled Residue Count: 726 
• Deposited 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

• PDB DOI: 10.2210/pdb4OR2/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Escherichia coli, Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): Yes 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• 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: 2.80 Å
• R-Value Free: 0.268 
• R-Value Work: 0.227 
• R-Value Observed: 0.229 

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
• Primary Citation of Related Structures:  
  4OR2


• 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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Soluble cytochrome b562, Metabotropic glutamate receptor 1	A, B	389	Escherichia coli, Homo sapiens This entity is chimeric	Mutation(s): 3  Gene Names: cybC, GRM1_HUMAN, GPRC1A, GRM1, MGLUR1 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
Find proteins for Q13255 (Homo sapiens) Explore Q13255  Go to UniProtKB:  Q13255
PHAROS:  Q13255
UniProt Groups	Q13255P0ABE7

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CLR	D [auth A], E [auth A], F [auth A], G [auth A], O [auth B], P [auth B]	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N
FM9	C [auth A], K [auth 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
OLC	I [auth A], J [auth A], N [auth B]	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate C21 H40 O4 RZRNAYUHWVFMIP-GDCKJWNLSA-N
OLA	H [auth A]	OLEIC ACID C18 H34 O2 ZQPPMHVWECSIRJ-KTKRTIGZSA-N
PO4	L [auth B], M [auth B]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Binding Affinity Annotations
ID	Source	Binding Affinity
FM9	BindingDB:  4OR2	Ki: 5.4 (nM) from 1 assay(s)
		IC50: min: 5.1, max: 1.00e+4 (nM) from 3 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.268 
• R-Value Work: 0.227 
• R-Value Observed: 0.229 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.361	α = 90
b = 86.552	β = 90
c = 168.277	γ = 90

Software Package:

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

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
  Changes: Structure summary
• Version 1.2: 2015-02-04
  Changes: Derived calculations
• Version 1.3: 2015-04-01
  Changes: Database references
• Version 1.4: 2017-08-16
  Changes: Refinement description, Source and taxonomy
• Version 1.5: 2017-11-22
  Changes: Refinement description