2LI7

Solution Structure of CssII


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: 20 structures for lowest energy and no violations 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Solution structure of native and recombinant expressed toxin CssII from the venom of the scorpion Centruroides suffusus suffusus, and their effects on Nav1.5 Sodium channels.

Saucedo, A.L.Del Rio-Portilla, F.Picco, C.Estrada, G.Prestipino, G.Possani, L.D.Delepierre, M.Corzo, G.

(2012) Biochim.Biophys.Acta 1824: 478-487

  • DOI: 10.1016/j.bbapap.2012.01.003
  • Primary Citation of Related Structures:  2LJM

  • PubMed Abstract: 
  • The three-dimensional structures of the long-chain mammalian scorpion β-toxin CssII from Centruroides suffusus suffusus and of its recombinant form, HisrCssII, were determined by NMR. The neurotoxin CssII (nCssII) is a 66 amino acid long peptide with ...

    The three-dimensional structures of the long-chain mammalian scorpion β-toxin CssII from Centruroides suffusus suffusus and of its recombinant form, HisrCssII, were determined by NMR. The neurotoxin CssII (nCssII) is a 66 amino acid long peptide with four disulfide bridges; it is the most abundant and deadly toxin from the venom of this scorpion. Both native and recombinant CssII structures were determined by nuclear magnetic resonance using a total of 828 sequential distance constraints derived from the volume integration of the cross peaks observed in 2D NOESY spectra. Both nCssII and HisrCssII structures display a mixed α/β fold stabilized by four disulfide bridges formed between pairs of cysteines: C1-C8, C2-C5, C3-C6, and C4-C7 (the numbers indicate the relative positions of the cysteine residues in the primary structure), with a distortion induced by two cis-prolines in its C-terminal part. The native CssII electrostatic surface was compared to both the recombinant one and to the Cn2 toxin, from the scorpion Centruroides noxius, which is also toxic to mammals. Structural features such N- and C-terminal differences could influence toxin specificity and affinity towards isoforms of different sub-types of Na(v) channels.


    Organizational Affiliation

    Departamento de Química de Biomacromoléculas, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-mammal toxin Css2
A
67Centruroides suffusus suffususN/A
Find proteins for P08900 (Centruroides suffusus suffusus)
Go to UniProtKB:  P08900
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: 20 structures for lowest energy and no violations 
  • Olderado: 2LI7 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-15
    Type: Initial release