1NIX

THREE DIMENSIONAL SOLUTION STRUCTURE OF HAINANTOXIN-I BY 2D 1H-NMR


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Function and solution structure of hainantoxin-I, a novel insect sodium channel inhibitor from the Chinese bird spider Selenocosmia hainana.

Li, D.Xiao, Y.Hu, W.Xie, J.Bosmans, F.Tytgat, J.Liang, S.

(2003) FEBS Lett 555: 616-622

  • DOI: 10.1016/s0014-5793(03)01303-6
  • Primary Citation of Related Structures:  
    1NIX

  • PubMed Abstract: 
  • Hainantoxin-I is a novel peptide toxin, purified from the venom of the Chinese bird spider Selenocosmia hainana (=Ornithoctonus hainana). It includes 33 amino acid residues with a disulfide linkage of I-IV, II-V and III-VI, assigned by partial reduct ...

    Hainantoxin-I is a novel peptide toxin, purified from the venom of the Chinese bird spider Selenocosmia hainana (=Ornithoctonus hainana). It includes 33 amino acid residues with a disulfide linkage of I-IV, II-V and III-VI, assigned by partial reduction and sequence analysis. Under two-electrode voltage-clamp conditions, hainantoxin-I can block rNa(v)1.2/beta(1) and the insect sodium channel para/tipE expressed in Xenopus laevis oocytes with IC(50) values of 68+/-6 microM and 4.3+/-0.3 microM respectively. The three-dimensional solution structure of hainantoxin-I belongs to the inhibitor cystine knot structural family determined by two-dimensional (1)H nuclear magnetic resonance techniques. Structural comparison of hainantoxin-I with those of other toxins suggests that the combination of the charged residues and a vicinal hydrophobic patch should be responsible for ligand binding. This is the first report of an insect sodium channel blocker from spider venom and it provides useful information for the structure-function relationship studies of insect sodium channels.


    Organizational Affiliation

    College of Life Sciences, Peking University, 100871, Beijing, PR China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HAINANTOXIN-IA34Haplopelma hainanumMutation(s): 0 
Find proteins for D2Y1X6 (Cyriopagopus hainanus)
Explore D2Y1X6 
Go to UniProtKB:  D2Y1X6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1NIX Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2002-12-29 
  • Released Date: 2003-01-14 
  • Deposition Author(s): Li, D., Liang, S.

Revision History 

  • Version 1.0: 2003-01-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations