Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 9.71 kDa 
• Atom Count: 673 
• Modelled Residue Count: 87 
• Deposited Residue Count: 87 
• Unique protein chains: 2

1HAA

A beta-Hairpin Structure in a 13-mer Peptide that Binds a-Bungarotoxin with High Affinity and Neutralizes its Toxicity

• DOI: 10.2210/pdb1HAA/pdb
• BMRB: 4195

• Classification: TOXIN/PEPTIDE
• Organism(s): Bungarus multicinctus, synthetic construct
• Mutation(s): No 


• Deposited: 2001-04-05 Released: 2001-05-25 
• Deposition Author(s): Scherf, T., Kasher, R., Balass, M., Fridkin, M., Fuchs, S., Katchalski-Katzir, E.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 
• Selection Criteria: NO RESTRAINT VIOLATION 

Literature

A Beta-Hairpin Structure in a 13-mer Peptide that Binds Alpha-Bungarotoxin with High Affinity and Neutralizes its Toxicity

Scherf, T., Kasher, R., Balass, M., Fridkin, M., Fuchs, S., Katchalski-Katzir, E.

(2001) Proc Natl Acad Sci U S A 98: 6629

• PubMed: 11381118 
• DOI: 10.1073/pnas.111164298
• Primary Citation of Related Structures:  
  1HAA, 1HAJ


• PubMed Abstract: 
  

Snake-venom alpha-bungarotoxin is a member of the alpha-neurotoxin family that binds with very high affinity to the nicotinic acetylcholine receptor (AChR) at the neuromuscular junction. The structure of the complex between alpha-bungarotoxin and a 13-mer peptide (WRYYESSLEPYPD) that binds the toxin with high affinity, thus inhibiting its interactions with AChR with an IC(50) of 2 nM, has been solved by (1)H-NMR spectroscopy. The bound peptide folds into a beta-hairpin structure created by two antiparallel beta-strands, which combine with the already existing triple-stranded beta-sheet of the toxin to form a five-stranded intermolecular, antiparallel beta-sheet. Peptide residues Y3(P), E5(P), and L8(P) have the highest intermolecular contact area, indicating their importance in the binding of alpha-bungarotoxin; W1(P), R2(P), and Y4(P) also contribute significantly to the binding. A large number of characteristic hydrogen bonds and electrostatic and hydrophobic interactions are observed in the complex. The high-affinity peptide exhibits inhibitory potency that is better than any known peptide derived from AChR, and is equal to that of the whole alpha-subunit of AChR. The high degree of sequence similarity between the peptide and various types of AChRs implies that the binding mode found within the complex might possibly mimic the receptor binding to the toxin. The design of the high-affinity peptide was based on our previous findings: (i) the detection of a lead peptide (MRYYESSLKSYPD) that binds alpha-bungarotoxin, using a phage-display peptide library, (ii) the information about the three-dimensional structure of alpha-bungarotoxin/lead-peptide complex, and (iii) the amino acid sequence analysis of different AChRs.

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Related Citations: 

• Design and Synthesis of Peptides that Bind A-Bungarotoxin with High Affinity
  Kasher, R., Balass, M., Scherf, T., Fridkin, M., Fuchs, S., Katchalski-Katzir, E.
  (2001) Chem Biol 8: 147

• Three-Dimensional Solution Structure of the Complex of A-Bungarotoxin with a Library-Derived Peptide
  Scherf, T., Balass, M., Fridkin, M., Fuchs, S., Katchalski-Katzir, E., Anglister, J.
  (1997) Proc Natl Acad Sci U S A 94: 6059

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Organizational Affiliation: 

Department of Chemical Services, The Weizmann Institute of Science, Rehovot 76100, Israel.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALPHA-BUNGAROTOXIN	A	74	Bungarus multicinctus	Mutation(s): 0
Find proteins for P60615 (Bungarus multicinctus) Explore P60615  Go to UniProtKB:  P60615

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPTIDE	B	13	synthetic construct	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 
• Selection Criteria: NO RESTRAINT VIOLATION 
• OLDERADO: 1HAA Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-04-05 
• Released Date: 2001-05-25 
Deposition Author(s): Scherf, T., Kasher, R., Balass, M., Fridkin, M., Fuchs, S., Katchalski-Katzir, E.

Revision History  

• Version 1.0: 2001-05-25
  Type: Initial release
  
• Version 1.1: 2017-02-08
  Changes: Derived calculations, Other, Source and taxonomy, Version format compliance