3R7X

Crystal Structure Analysis of a Quinazolinedione sulfonamide bound to human GluR2: A Novel Class of Competitive AMPA Receptor Antagonists with Oral Activity

• PDB DOI: https://doi.org/10.2210/pdb3R7X/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-03-23 Released: 2011-05-18 
• Deposition Author(s): Kallen, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.250 
• R-Value Work: 0.204 
• R-Value Observed: 0.206 

Literature

Quinazolinedione sulfonamides: A novel class of competitive AMPA receptor antagonists with oral activity.

Koller, M., Lingenhoehl, K., Schmutz, M., Vranesic, I.T., Kallen, J., Auberson, Y.P., Carcache, D.A., Mattes, H., Ofner, S., Orain, D., Urwyler, S.

(2011) Bioorg Med Chem Lett 21: 3358-3361

• PubMed: 21531559 
• DOI: https://doi.org/10.1016/j.bmcl.2011.04.017
• Primary Citation of Related Structures:  
  3R7X


• PubMed Abstract: 
  

  Quinazoline-2,4-diones with a sulfonamide group attached to the N(3) ring atom constitute a novel class of competitive AMPA receptor antagonists. One of the synthesized compounds, 28, shows nanomolar receptor affinity, whereas other examples of the series display oral anticonvulsant activity in animal models.

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Organizational Affiliation: 

Novartis Institutes for BioMedical Research, Global Discovery Chemistry, 4002 Basel, Switzerland. [e-mail]

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 59.21 kDa 
• Atom Count: 4,529 
• Modelled Residue Count: 516 
• Deposited Residue Count: 526 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glutamate receptor 2	A, B	263	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P42262 (Homo sapiens) Explore P42262  Go to UniProtKB:  P42262
PHAROS:  P42262 GTEx:  ENSG00000120251

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
QSN	C [auth A]	N-[6-(1H-imidazol-1-yl)-7-nitro-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl]methanesulfonamide C12 H10 N6 O6 S CSIKZRHFFDICGQ-UHFFFAOYSA-N
GLU	D [auth B]	GLUTAMIC ACID C5 H9 N O4 WHUUTDBJXJRKMK-VKHMYHEASA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
QSN	Binding MOAD:  3R7X	IC50: 82 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.250 
• R-Value Work: 0.204 
• R-Value Observed: 0.206 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.36	α = 90
b = 88.578	β = 90
c = 97.626	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
RemDAq	data collection
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-05-18 
Deposition Author(s): Kallen, J.

Revision History  

• Version 1.0: 2011-05-18
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-07-26
  Changes: Refinement description, Source and taxonomy