1FU3

THREE-DIMENSIONAL STRUCTURE IN SOLUTION OF THE SODIUM CHANNEL AGONIST/ANTAGONIST DELTA-CONOTOXIN TXVIA


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional solution structure of the sodium channel agonist/antagonist delta-conotoxin TxVIA.

Kohno, T.Sasaki, T.Kobayashi, K.Fainzilber, M.Sato, K.

(2002) J.Biol.Chem. 277: 36387-36391

  • DOI: 10.1074/jbc.M206833200

  • PubMed Abstract: 
  • The three-dimensional solution structure of delta-conotoxin TxVIA, a 27-mer peptide agonist/antagonist of sodium channels, was determined by two-dimensional (1)H NMR spectroscopy with simulated annealing calculations. A total of 20 converged structur ...

    The three-dimensional solution structure of delta-conotoxin TxVIA, a 27-mer peptide agonist/antagonist of sodium channels, was determined by two-dimensional (1)H NMR spectroscopy with simulated annealing calculations. A total of 20 converged structures of delta-conotoxin TxVIA were obtained on the basis of 360 distance constraints obtained from nuclear Overhauser effect connectivities, 28 torsion angle constraints, and 27 constraints associated with hydrogen bonds and disulfide bonds. The atomic root mean square difference about the averaged coordinate positions is 0.35 +/- 0.07 A for the backbone atoms (N, C(alpha), C) and 0.98 +/- 0.14 A for all heavy atoms of the entire peptide. The molecular structure of delta-conotoxin TxVIA is composed of a short triple-stranded antiparallel beta-sheet. The overall beta-sheet topology is +2x, -1, which is the same as those for other conotoxins. However, the three-dimensional structure of delta-conotoxin TxVIA has an unusual hydrophobic patch on one side of the molecule, which may play an important role in the sodium channel binding. These results provide a molecular basis for understanding the mechanism of sodium channel modulation through the toxin-channel interaction and insight into the discrimination of different ion channels.


    Organizational Affiliation

    Mitsubishi Kagaku Institute of Life Sciences (MITILS), 11 Minamiooya, Machida, Tokyo 194-8511, Japan. tkohno@libra.ls.m-kagaku.co.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DELTA-CONOTOXIN TXVIA
A
27Conus textileN/A
Find proteins for P18511 (Conus textile)
Go to UniProtKB:  P18511
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1FU3 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-09-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance