7QL6

Torpedo muscle-type nicotinic acetylcholine receptor - carbamylcholine-bound conformation


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.23 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Conformational transitions and ligand-binding to a muscle-type nicotinic acetylcholine receptor.

Zarkadas, E.Pebay-Peyroula, E.Thompson, M.J.Schoehn, G.Uchanski, T.Steyaert, J.Chipot, C.Dehez, F.Baenziger, J.E.Nury, H.

(2022) Neuron 110: 1358

  • DOI: 10.1016/j.neuron.2022.01.013
  • Primary Citation of Related Structures:  
    7QKO, 7QL5, 7QL6

  • PubMed Abstract: 
  • Fast synaptic communication requires receptors that respond to the presence of neurotransmitter by opening an ion channel across the post-synaptic membrane. The muscle-type nicotinic acetylcholine receptor from the electric fish, Torpedo, is the prototypic ligand-gated ion channel, yet the structural changes underlying channel activation remain undefined ...

    Fast synaptic communication requires receptors that respond to the presence of neurotransmitter by opening an ion channel across the post-synaptic membrane. The muscle-type nicotinic acetylcholine receptor from the electric fish, Torpedo, is the prototypic ligand-gated ion channel, yet the structural changes underlying channel activation remain undefined. Here we use cryo-EM to solve apo and agonist-bound structures of the Torpedo nicotinic receptor embedded in a lipid nanodisc. Using both a direct biochemical assay to define the conformational landscape and molecular dynamics simulations to assay flux through the pore, we correlate structures with functional states and elucidate the motions that lead to pore activation of a heteromeric nicotinic receptor. We highlight an underappreciated role for the complementary subunit in channel gating, establish the structural basis for the differential agonist affinities of α/δ versus α /γ sites, and explain why nicotine is less potent at muscle nicotinic receptors compared to neuronal ones.


    Organizational Affiliation

    Université Grenoble Alpes, CNRS, CEA, IBS, F-38000 Grenoble, France. Electronic address: hugues.nury@ibs.fr.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor subunit alphaA, D437Tetronarce californicaMutation(s): 0 
Gene Names: CHRNA1
Membrane Entity: Yes 
UniProt
Find proteins for P02710 (Tetronarce californica)
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Go to UniProtKB:  P02710
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UniProt GroupP02710
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor subunit betaB469Tetronarce californicaMutation(s): 0 
Gene Names: CHRNB1
Membrane Entity: Yes 
UniProt
Find proteins for P02712 (Tetronarce californica)
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Go to UniProtKB:  P02712
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UniProt GroupP02712
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor subunit deltaC501Tetronarce californicaMutation(s): 0 
Gene Names: chrnd
Membrane Entity: Yes 
UniProt
Find proteins for P02718 (Tetronarce californica)
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Go to UniProtKB:  P02718
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UniProt GroupP02718
Protein Feature View
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor subunit gammaE489Tetronarce californicaMutation(s): 0 
Gene Names: CHRNG
Membrane Entity: Yes 
UniProt
Find proteins for P02714 (Tetronarce californica)
Explore P02714 
Go to UniProtKB:  P02714
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UniProt GroupP02714
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Oligosaccharides

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Entity ID: 5
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseF, K, L 6N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G34442SS
GlyCosmos:  G34442SS
GlyGen:  G34442SS
Entity ID: 6
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseG, H, I 5N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G22768VO
GlyCosmos:  G22768VO
GlyGen:  G22768VO
Entity ID: 7
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseJ 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
O [auth E]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
CCE (Subject of Investigation/LOI)
Query on CCE

Download Ideal Coordinates CCD File 
M [auth A],
N [auth D]
2-[(AMINOCARBONYL)OXY]-N,N,N-TRIMETHYLETHANAMINIUM
C6 H15 N2 O2
VPJXQGSRWJZDOB-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.23 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research Council (ERC)Canada637733
Natural Sciences and Engineering Research Council (NSERC, Canada)Canada113312

Revision History  (Full details and data files)

  • Version 1.0: 2022-02-09
    Type: Initial release
  • Version 1.1: 2022-02-16
    Changes: Database references
  • Version 1.2: 2022-05-04
    Changes: Database references