1HP3

C-TERMINAL TRUNCATION OF OMEGA-ATRACOTOXIN-HV2A (CT-HV2A)

• PDB DOI: https://doi.org/10.2210/pdb1HP3/pdb
• BMRB: 4923

• Classification: TOXIN
• Organism(s): Hadronyche versuta
• Mutation(s): No 


• Deposited: 2000-12-12 Released: 2002-12-11 
• Deposition Author(s): Wang, X.-H., King, G.F.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Discovery and structure of a potent and highly specific blocker of insect calcium channels

Wang, X.-H., Connor, M., Wilson, D., Wilson, H.I., Nicholson, G.M., Smith, R., Shaw, D., Mackay, J.P., Alewood, P.F., Christie, M.J., King, G.F.

(2001) J Biol Chem 276: 40306-40312

• PubMed: 11522785 
• DOI: https://doi.org/10.1074/jbc.M105206200
• Primary Citation of Related Structures:  
  1G9P, 1HP3


• PubMed Abstract: 
  

  We have isolated a novel family of insect-selective neurotoxins that appear to be the most potent blockers of insect voltage-gated calcium channels reported to date. These toxins display exceptional phylogenetic specificity, with at least a 10,000-fold preference for insect versus vertebrate calcium channels. The structure of one of the toxins reveals a highly structured, disulfide-rich core and a structurally disordered C-terminal extension that is essential for channel blocking activity. Weak structural/functional homology with omega-agatoxin-IVA/B, the prototypic inhibitor of vertebrate P-type calcium channels, suggests that these two toxin families might share a similar mechanism of action despite their vastly different phylogenetic specificities.

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Organizational Affiliation: 

Department of Biochemistry, University of Connecticut Health Center, Farmington, CT 06032, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 3.38 kDa 
• Atom Count: 230 
• Modelled Residue Count: 32 
• Deposited Residue Count: 32 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
OMEGA-ATRACOTOXIN-HV2A	A	32	N/A	Mutation(s): 0
UniProt
Find proteins for P82852 (Hadronyche versuta) Explore P82852  Go to UniProtKB:  P82852

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-12-11 
Deposition Author(s): Wang, X.-H., King, G.F.

Revision History  

• Version 1.0: 2002-12-11
  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
• Version 1.4: 2024-11-13
  Changes: Data collection, Structure summary