1OED

STRUCTURE OF ACETYLCHOLINE RECEPTOR PORE FROM ELECTRON IMAGES


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure and gating mechanism of the acetylcholine receptor pore.

Miyazawa, A.Fujiyoshi, Y.Unwin, N.

(2003) Nature 423: 949-955

  • DOI: 10.1038/nature01748
  • Primary Citation of Related Structures:  
    1OED

  • PubMed Abstract: 
  • The nicotinic acetylcholine receptor controls electrical signalling between nerve and muscle cells by opening and closing a gated, membrane-spanning pore. Here we present an atomic model of the closed pore, obtained by electron microscopy of crystalline postsynaptic membranes ...

    The nicotinic acetylcholine receptor controls electrical signalling between nerve and muscle cells by opening and closing a gated, membrane-spanning pore. Here we present an atomic model of the closed pore, obtained by electron microscopy of crystalline postsynaptic membranes. The pore is shaped by an inner ring of 5 alpha-helices, which curve radially to create a tapering path for the ions, and an outer ring of 15 alpha-helices, which coil around each other and shield the inner ring from the lipids. The gate is a constricting hydrophobic girdle at the middle of the lipid bilayer, formed by weak interactions between neighbouring inner helices. When acetylcholine enters the ligand-binding domain, it triggers rotations of the protein chains on opposite sides of the entrance to the pore. These rotations are communicated through the inner helices, and open the pore by breaking the girdle apart.


    Related Citations: 
    • Activation of the Nicotinic Acetylcholine Receptor Involves a Switch in Conformation of the Alpha Subunits
      Unwin, N., Miyazawa, A., Li, J., Fujiyoshi, Y.
      (2002) J Mol Biol 319: 1165
    • Nicotinic Acetylcholine Receptor at 9A Resolution
      Unwin, N.
      (1993) J Mol Biol 229: 1101
    • Nicotinic Acetylcholine Receptor at 4.6A Resolution Transverse Tunnels in the Channel Wall.
      Miyazawa, A., Fujiyoshi, Y., Stowell, M., Unwin, N.
      (1999) J Mol Biol 288: 765

    Organizational Affiliation

    RIKEN Harima Institute, 1-1-1 Kouto, Mikazuki-cho, Sayo, Hyogo 679-5148, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor subunit alphaA, D227Torpedo marmorataMutation(s): 0 
Gene Names: CHRNA1
Membrane Entity: Yes 
UniProt
Find proteins for P02711 (Torpedo marmorata)
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Go to UniProtKB:  P02711
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor beta subunitB250Torpedo marmorataMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P02712 (Tetronarce californica)
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor delta subunitC260Torpedo marmorataMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P02718 (Tetronarce californica)
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Go to UniProtKB:  P02718
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor gamma subunitE260Torpedo marmorataMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P02714 (Tetronarce californica)
Explore P02714 
Go to UniProtKB:  P02714
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-09-11
    Changes: Author supporting evidence, Data collection, Database references, Source and taxonomy, Structure summary