2MSF

NMR SOLUTION STRUCTURE OF SCORPION VENOM TOXIN Ts11 (TsPep1) FROM Tityus serrulatus


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural and Functional Elucidation of Peptide Ts11 Shows Evidence of a Novel Subfamily of Scorpion Venom Toxins.

Cremonez, C.M.Maiti, M.Peigneur, S.Cassoli, J.S.Dutra, A.A.Waelkens, E.Lescrinier, E.Herdewijn, P.de Lima, M.E.Pimenta, A.M.Arantes, E.C.Tytgat, J.

(2016) Toxins (basel) 8

  • DOI: 10.3390/toxins8100288
  • Primary Citation of Related Structures:  
    2MSF

  • PubMed Abstract: 
  • To date, several families of peptide toxins specifically interacting with ion channels in scorpion venom have been described. One of these families comprise peptide toxins (called KTxs), known to modulate potassium channels. Thus far, 202 KTxs have been reported, belonging to several subfamilies of KTxs (called α, β, γ, κ, δ, and λ-KTxs) ...

    To date, several families of peptide toxins specifically interacting with ion channels in scorpion venom have been described. One of these families comprise peptide toxins (called KTxs), known to modulate potassium channels. Thus far, 202 KTxs have been reported, belonging to several subfamilies of KTxs (called α, β, γ, κ, δ, and λ-KTxs). Here we report on a previously described orphan toxin from Tityus serrulatus venom, named Ts11. We carried out an in-depth structure-function analysis combining 3D structure elucidation of Ts11 and electrophysiological characterization of the toxin. The Ts11 structure is highlighted by an Inhibitor Cystine Knot (ICK) type scaffold, completely devoid of the classical secondary structure elements (α-helix and/or β-strand). This has, to the best of our knowledge, never been described before for scorpion toxins and therefore represents a novel, 6th type of structural fold for these scorpion peptides. On the basis of their preferred interaction with voltage-gated K channels, as compared to all the other targets tested, it can be postulated that Ts11 is the first member of a new subfamily, designated as ε-KTx.


    Organizational Affiliation

    Toxicology & Pharmacology, University of Leuven (KU Leuven), Campus Gasthuisberg O&N2, P.O. Box 922, Leuven 3000, Belgium. jan.tytgat@pharm.kuleuven.be.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Peptide TsPep1A29Tityus serrulatusMutation(s): 0 
UniProt
Find proteins for P0C174 (Tityus serrulatus)
Explore P0C174 
Go to UniProtKB:  P0C174
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2MSF Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-08-26
    Type: Initial release
  • Version 1.1: 2016-10-26
    Changes: Database references