3KG2

AMPA subtype ionotropic glutamate receptor in complex with competitive antagonist ZK 200775

• PDB DOI: https://doi.org/10.2210/pdb3KG2/pdb

• Classification: membrane protein, transport protein
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): Yes 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2009-10-28 Released: 2009-12-08 
• Deposition Author(s): Sobolevsky, A.I., Rosconi, M.P., Gouaux, E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.60 Å
• R-Value Free: 0.296 
• R-Value Work: 0.286 
• R-Value Observed: 0.287 

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 372.48 kDa 
• Atom Count: 22,686 
• Modelled Residue Count: 3,116 
• Deposited Residue Count: 3,292 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glutamate receptor 2	A, B, C, D	823	Rattus norvegicus	Mutation(s): 11  Gene Names: Gria2, Glur2 Membrane Entity: Yes
UniProt
Find proteins for P19491 (Rattus norvegicus) Explore P19491  Go to UniProtKB:  P19491

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E, F	4		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G31886NL GlyCosmos:  G31886NL GlyGen:  G31886NL

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	G, H	3		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G15407YE GlyCosmos:  G15407YE GlyGen:  G15407YE

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZK1	I [auth A], J [auth B], K [auth C], L [auth D]	{[7-morpholin-4-yl-2,3-dioxo-6-(trifluoromethyl)-3,4-dihydroquinoxalin-1(2H)-yl]methyl}phosphonic acid C14 H15 F3 N3 O6 P WZMQMKNCWDCCMT-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.60 Å
• R-Value Free: 0.296 
• R-Value Work: 0.286 
• R-Value Observed: 0.287 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 90.715	α = 85.32
b = 109.848	β = 84.75
c = 161.13	γ = 78.92

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-12-08 
Deposition Author(s): Sobolevsky, A.I., Rosconi, M.P., Gouaux, E.

Revision History  

• Version 1.0: 2009-12-08
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.2: 2012-03-21
  Changes: Database references
• Version 1.3: 2015-05-27
  Changes: Refinement description
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary
• Version 2.1: 2021-10-13
  Changes: Database references, Structure summary
• Version 2.2: 2023-09-06
  Changes: Data collection, Refinement description