Biological Assembly 1  

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

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 402.17 kDa 
• Atom Count: 11706 
• Modelled Residue Count: 1504 
• Deposited Residue Count: 3556 
• Unique protein chains: 1

6U5S

NTD of GluA2 in complex with CNIH3 - with antagonist ZK200775 - in pseudo-symmetric global conformation

• PDB DOI: 10.2210/pdb6U5S/pdb
• EM Map EMD-20654: EMDB EMDataResource

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


• Deposited: 2019-08-28 Released: 2019-12-04 
• Deposition Author(s): Nakagawa, T.
• Funding Organization(s): National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.07 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structures of the AMPA receptor in complex with its auxiliary subunit cornichon.

Nakagawa, T.

(2019) Science 366: 1259-1263

• PubMed: 31806817 
• DOI: 10.1126/science.aay2783
• Primary Citation of Related Structures:  
  6PEQ, 6U5S, 6U6I, 6UCB, 6UD4, 6UD8


• PubMed Abstract: 
  

In the brain, AMPA-type glutamate receptors (AMPARs) form complexes with their auxiliary subunits and mediate the majority of fast excitatory neurotransmission. Signals transduced by these complexes are critical for synaptic plasticity, learning, and memory. The two major categories of AMPAR auxiliary subunits are transmembrane AMPAR regulatory proteins (TARPs) and cornichon homologs (CNIHs); these subunits share little homology and play distinct roles in controlling ion channel gating and trafficking of AMPAR. Here, I report high-resolution cryo-electron microscopy structures of AMPAR in complex with CNIH3. Contrary to its predicted membrane topology, CNIH3 lacks an extracellular domain and instead contains four membrane-spanning helices. The protein-protein interaction interface that dictates channel modulation and the lipids surrounding the complex are revealed. These structures provide insights into the molecular mechanism for ion channel modulation and assembly of AMPAR/CNIH3 complexes.

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Organizational Affiliation: 

Department of Molecular Physiology and Biophysics, Center for Structural Biology, and Vanderbilt Brain Institute, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glutamate receptor 2	A, B, C, D	889	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

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E, G, I, K	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT GlyCosmos:  G42666HT GlyGen:  G42666HT

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

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.07 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-08-28 
• Released Date: 2019-12-04 
Deposition Author(s): Nakagawa, T.

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Funding Organization	Location	Grant Number
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)	United States	R01HD061543

Revision History  

• Version 1.0: 2019-12-04
  Type: Initial release
  
• Version 1.1: 2019-12-11
  Changes: Author supporting evidence
• Version 1.2: 2019-12-18
  Changes: Database references
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary