1L4W

NMR structure of an AChR-peptide (Torpedo Californica, alpha-subunit residues 182-202) in complex with alpha-Bungarotoxin

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 1 

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This is version 1.3 of the entry. See complete history. 


Literature

The mechanism for acetylcholine receptor inhibition by alpha-neurotoxins and species-specific resistance to alpha-bungarotoxin revealed by NMR.

Samson, A., Scherf, T., Eisenstein, M., Chill, J., Anglister, J.

(2002) Neuron 35: 319-332

  • DOI: 10.1016/s0896-6273(02)00773-0
  • Primary Citation of Related Structures:  
    1L4W, 1LJZ

  • PubMed Abstract: 

    • The structure of a peptide corresponding to residues 182-202 of the acetylcholine receptor alpha1 subunit in complex with alpha-bungarotoxin was solved using NMR spectroscopy. The peptide contains the complete sequence of the major determinant of AChR involved in alpha-bungarotoxin binding ...

    The structure of a peptide corresponding to residues 182-202 of the acetylcholine receptor alpha1 subunit in complex with alpha-bungarotoxin was solved using NMR spectroscopy. The peptide contains the complete sequence of the major determinant of AChR involved in alpha-bungarotoxin binding. One face of the long beta hairpin formed by the AChR peptide consists of exposed nonconserved residues, which interact extensively with the toxin. Mutations of these receptor residues confer resistance to the toxin. Conserved AChR residues form the opposite face of the beta hairpin, which creates the inner and partially hidden pocket for acetylcholine. An NMR-derived model for the receptor complex with two alpha-bungarotoxin molecules shows that this pocket is occupied by the conserved alpha-neurotoxin residue R36, which forms cation-pi interactions with both alphaW149 and gammaW55/deltaW57 of the receptor and mimics acetylcholine.

    Organizational Affiliation: 

    Department of Structural Biology, The Weizmann Institute of Science, Rehovot, Israel.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
alpha-BungarotoxinA74Bungarus multicinctusMutation(s): 0 
UniProt
Find proteins for P60615 (Bungarus multicinctus)
Explore P60615 
Go to UniProtKB:  P60615
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UniProt GroupP60615
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholine receptor proteinB25N/AMutation(s): 0 
UniProt
Find proteins for P02711 (Torpedo marmorata)
Explore P02711 
Go to UniProtKB:  P02711
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UniProt GroupP02711
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 1 
  • OLDERADO: 1L4W Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-07-17
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations