NMR Structure of alpha-Bungarotoxin

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 30 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.3 of the entry. See complete history


NMR structure of alpha-bungarotoxin free and bound to a mimotope of the nicotinic acetylcholine receptor.

Scarselli, M.Spiga, O.Ciutti, A.Bernini, A.Bracci, L.Lelli, B.Lozzi, L.Calamandrei, D.Di Maro, D.Klein, S.Niccolai, N.

(2002) Biochemistry 41: 1457-1463

  • DOI: https://doi.org/10.1021/bi011012f
  • Primary Citation of Related Structures:  
    1HOY, 1IK8, 1IKC, 1JBD

  • PubMed Abstract: 

    A combinatorial library approach was used to produce synthetic peptides mimicking the snake neurotoxin binding site of nicotinic receptors. Among the sequences, which inhibited binding of alpha-bungarotoxin to muscle and neuronal nicotinic receptors, HRYYESSLPWYPD, a 14-amino acid peptide with considerably higher toxin-binding affinity than the other synthesized peptides, was selected, and the structure of its complex with the toxin was analyzed by NMR. Comparison of the solution structure of the free toxin and its complex with this peptide indicated that complex formation induced extensive conformational rearrangements mainly at finger II and the carboxy terminus of the protein. The peptidyl residues P10 and Y4 seemed to be critical for peptide folding and complex stability, respectively. The latter residue of the peptide strongly interacted with the protein by entering a small pocket delimited by D30, C33, S34, R36, and V39 toxin side chains.

  • Organizational Affiliation

    Department of Molecular Biology and Biomolecular Structure Research Center, University of Siena, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
long neurotoxin 174Bungarus multicinctusMutation(s): 0 
Find proteins for P60615 (Bungarus multicinctus)
Explore P60615 
Go to UniProtKB:  P60615
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP60615
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 30 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-05-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    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