Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Biological Assembly 2  

 3D View: Structure | Electron Density

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 41581.31 
• Atom Count: 2864 
• Residue Count: 392 
• Unique protein chains: 1

3GSL

Crystal structure of PSD-95 tandem PDZ domains 1 and 2

• DOI: 10.2210/pdb3GSL/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli BL21


• Deposited: 2009-03-27 Released: 2010-09-29 
• Deposition Author(s): Sainlos, M., Olivier, N.B., Imperiali, B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.281 
• R-Value Work: 0.214 

Literature

Biomimetic divalent ligands for the acute disruption of synaptic AMPAR stabilization.

Sainlos, M., Tigaret, C., Poujol, C., Olivier, N.B., Bard, L., Breillat, C., Thiolon, K., Choquet, D., Imperiali, B.

(2011) Nat.Chem.Biol. 7: 81-91

• PubMed: 21186349 
• DOI: 10.1038/nchembio.498


• PubMed Abstract: 
  

The interactions of the AMPA receptor (AMPAR) auxiliary subunit Stargazin with PDZ domain-containing scaffold proteins such as PSD-95 are critical for the synaptic stabilization of AMPARs. To investigate these interactions, we have developed biomimetic competing ligands that are assembled from two Stargazin-derived PSD-95/DLG/ZO-1 (PDZ) domain-binding motifs using 'click' chemistry. Characterization of the ligands in vitro and in a cellular FRET-based model revealed an enhanced affinity for the multiple PDZ domains of PSD-95 compared to monovalent peptides. In cultured neurons, the divalent ligands competed with transmembrane AMPAR regulatory protein (TARP) for the intracellular membrane-associated guanylate kinase resulting in increased lateral diffusion and endocytosis of surface AMPARs, while showing strong inhibition of synaptic AMPAR currents. This provides evidence for a model in which the TARP-containing AMPARs are stabilized at the synapse by engaging in multivalent interactions. In light of the prevalence of PDZ domain clusters, these new biomimetic chemical tools could find broad application for acutely perturbing multivalent complexes.

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Organizational Affiliation: 

Department of Chemistry and Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Disks large homolog 4	A, B	196	Rattus norvegicus	Mutation(s): 0  Gene Names: Dlg4 (Dlgh4, Psd95)
Find proteins for P31016 (Rattus norvegicus) Go to UniProtKB:  P31016

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.281 
• R-Value Work: 0.214 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 57.244	α = 90.00
b = 62.511	β = 99.25
c = 59.342	γ = 90.00

Software Package:

Software Name	Purpose
ADSC	data collection
HKL-2000	data scaling
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-03-27 
• Released Date: 2010-09-29 
• Deposition Author(s): Sainlos, M., Olivier, N.B., Imperiali, B.

Revision History 

• Version 1.0: 2010-09-29
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance