1EQ8

THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT


Experimental Data Snapshot

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 
  • Selection Criteria: structures with favorable non-bond energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of the M2 channel-lining segments from nicotinic acetylcholine and NMDA receptors by NMR spectroscopy.

Opella, S.J.Marassi, F.M.Gesell, J.J.Valente, A.P.Kim, Y.Oblatt-Montal, M.Montal, M.

(1999) Nat.Struct.Mol.Biol. 6: 374-379

  • DOI: 10.1038/7610
  • Primary Citation of Related Structures:  1A11, 1CEK, 2NR1

  • PubMed Abstract: 
  • The structures of functional peptides corresponding to the predicted channel-lining M2 segments of the nicotinic acetylcholine receptor (AChR) and of a glutamate receptor of the NMDA subtype (NMDAR) were determined using solution NMR experiments on m ...

    The structures of functional peptides corresponding to the predicted channel-lining M2 segments of the nicotinic acetylcholine receptor (AChR) and of a glutamate receptor of the NMDA subtype (NMDAR) were determined using solution NMR experiments on micelle samples, and solid-state NMR experiments on bilayer samples. Both M2 segments form straight transmembrane alpha-helices with no kinks. The AChR M2 peptide inserts in the lipid bilayer at an angle of 12 degrees relative to the bilayer normal, with a rotation about the helix long axis such that the polar residues face the N-terminal side of the membrane, which is assigned to be intracellular. A model built from these solid-state NMR data, and assuming a symmetric pentameric arrangement of M2 helices, results in a funnel-like architecture for the channel, with the wide opening on the N-terminal intracellular side.


    Related Citations: 
    • Dilute Spin-Exchange Assignment of Solid-State NMR Spectra of Oriented Proteins: Acetylcholine M2 in Bilayers
      Marassi, F.M.,Gesell, J.J.,Valente, A.P.,Kim, Y.,Oblatt-Montal, M.,Montal, M.,Opella, S.J.
      (1999) J.BIOMOL.NMR 14: 141


    Organizational Affiliation

    Department of Chemistry, University of Pennsylvania, Philadelphia 19014, USA. opella@chestnut.chem.upenn.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINE RECEPTOR PROTEIN
A, B, C, D, E
23Torpedo californicaGene Names: chrnd
Find proteins for P02718 (Torpedo californica)
Go to UniProtKB:  P02718
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OH
Query on OH

Download SDF File 
Download CCD File 
E
HYDROXIDE ION
H O
XLYOFNOQVPJJNP-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 
  • Selection Criteria: structures with favorable non-bond energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance