7RZA | pdb_00007rza

Structure of the complex of AMPA receptor GluA2 with auxiliary subunit GSG1L bound to agonist quisqualate

• PDB DOI: https://doi.org/10.2210/pdb7RZA/pdb
• EM Map EMD-24756: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Rattus norvegicus
• Expression System: Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2021-08-27 Released: 2021-10-27 
• Deposition Author(s): Gangwar, S.P., Klykov, O.V., Yelshanskaya, M.V., Sobolevsky, A.I.
• Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS), National Science Foundation (NSF, United States)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.26 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structure and desensitization of AMPA receptor complexes with type II TARP gamma 5 and GSG1L.

Klykov, O., Gangwar, S.P., Yelshanskaya, M.V., Yen, L., Sobolevsky, A.I.

(2021) Mol Cell 81: 4771-4783.e7

• PubMed: 34678168 
• DOI: https://doi.org/10.1016/j.molcel.2021.09.030
• Primary Citation Related Structures: 
  7RYY, 7RYZ, 7RZ4, 7RZ5, 7RZ6, 7RZ7, 7RZ8, 7RZ9, 7RZA


• PubMed Abstract: 
  

  AMPA receptors (AMPARs) mediate the majority of excitatory neurotransmission. Their surface expression, trafficking, gating, and pharmacology are regulated by auxiliary subunits. Of the two types of TARP auxiliary subunits, type I TARPs assume activating roles, while type II TARPs serve suppressive functions. We present cryo-EM structures of GluA2 AMPAR in complex with type II TARP γ5, which reduces steady-state currents, increases single-channel conductance, and slows recovery from desensitization. Regulation of AMPAR function depends on its ligand-binding domain (LBD) interaction with the γ5 head domain. GluA2-γ5 complex shows maximum stoichiometry of two TARPs per AMPAR tetramer, being different from type I TARPs but reminiscent of the auxiliary subunit GSG1L. Desensitization of both GluA2-GSG1L and GluA2-γ5 complexes is accompanied by rupture of LBD dimer interface, while GluA2-γ5 but not GluA2-GSG1L LBD dimers remain two-fold symmetric. Different structural architectures and desensitization mechanisms of complexes with auxiliary subunits endow AMPARs with broad functional capabilities.

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Organizational Affiliation: 
• Department of Biochemistry and Molecular Biophysics, Columbia University, 650 West 168th Street, New York, NY 10032, USA.
Department of Biochemistry and Molecular Biophysics, Columbia University, 650 West 168th Street, New York, NY 10032, USA; Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, 630 West 168th Street, New York, NY 10032, USA.
Department of Biochemistry and Molecular Biophysics, Columbia University, 650 West 168th Street, New York, NY 10032, USA. Electronic address: [e-mail].

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 516.03 kDa 
• Atom Count: 27,850 
• Modeled Residue Count: 3,532 
• Deposited Residue Count: 4,616 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glutamate receptor 2	A, B, C, D	1,154	Rattus norvegicus	Mutation(s): 0  Gene Names: Gria2, Glur2 Membrane Entity: Yes
UniProt
Find proteins for P19491 (Rattus norvegicus) Explore P19491  Go to UniProtKB:  P19491

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
QUS (Subject of Investigation/LOI)	E [auth A], F [auth B], G [auth C], H [auth D]	(S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)-PROPIONIC ACID C5 H7 N3 O5 ASNFTDCKZKHJSW-REOHCLBHSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.26 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2021-10-27 
Deposition Author(s): Gangwar, S.P., Klykov, O.V., Yelshanskaya, M.V., Sobolevsky, A.I.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	CA206573
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	NS083660
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	NS107253
National Science Foundation (NSF, United States)	United States	1818086

Revision History  

• Version 1.0: 2021-10-27
  Type: Initial release
  
• Version 1.1: 2022-02-16
  Changes: Database references
• Version 1.2: 2024-10-23
  Changes: Data collection, Structure summary