1CEK

THREE-DIMENSIONAL STRUCTURE OF THE MEMBRANE-EMBEDDED M2 CHANNEL-LINING SEGMENT FROM THE NICOTINIC ACETYLCHOLINE RECEPTOR BY SOLID-STATE NMR SPECTROSCOPY


Experimental Data Snapshot

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 24 
  • Conformers Submitted: 
  • Selection Criteria: LOWEST ENERGY 

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This is version 1.4 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 Biol 6: 374-379

  • DOI: https://doi.org/10.1038/7610
  • Primary Citation of Related Structures:  
    1A11, 1CEK, 1EQ8, 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 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.


  • Organizational Affiliation

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


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (ACETYLCHOLINE RECEPTOR M2)25Rattus norvegicusMutation(s): 0 
UniProt
Find proteins for P25110 (Rattus norvegicus)
Explore P25110 
Go to UniProtKB:  P25110
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25110
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLID-STATE NMR
  • Conformers Calculated: 24 
  • Conformers Submitted: 
  • Selection Criteria: LOWEST ENERGY 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-03-11
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-16
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-12-27
    Changes: Data collection