NMR solution structure of tamapin, mutant K20A

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • 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


Novel Blocker of Onco SK3 Channels Derived from Scorpion Toxin Tamapin and Active against Migration of Cancer Cells.

Mayorga-Flores, M.Chantome, A.Melchor-Meneses, C.M.Domingo, I.Titaux-Delgado, G.A.Galindo-Murillo, R.Vandier, C.Del Rio-Portilla, F.

(2020) ACS Med Chem Lett 11: 1627-1633

  • DOI: https://doi.org/10.1021/acsmedchemlett.0c00300
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Peptide-based therapy against cancer is a field of great interest for biomedical developments. Since it was shown that SK3 channels promote cancer cell migration and metastatic development, we started using these channels as targets for the development of antimetastatic drugs. Particularly, tamapin (a peptide found in the venom of the scorpion Mesobuthus tamulus ) is the most specific toxin against the SK2 channel currently known. Considering this fact, we designed diverse tamapin mutants based on three different hypotheses to discover a new potent molecule to block SK3 channels. We performed in vitro studies to evaluate this new toxin derivative inhibitor of cancer cell migration. Our results can be used to generate a new tamapin-based therapy against cancer cells that express SK3 channels.

  • Organizational Affiliation

    N2C UMR 1069, University of Tours, INSERM, Faculté de Pharmacie, Calciscreen Platform, 37032 Tours, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Potassium channel toxin alpha-KTx 5.431Mesobuthus tamulusMutation(s): 1 
Find proteins for P59869 (Hottentotta tamulus)
Explore P59869 
Go to UniProtKB:  P59869
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP59869
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica (PAPIIT)Mexico207516

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-29
    Type: Initial release
  • Version 1.1: 2020-08-19
    Changes: Source and taxonomy
  • Version 1.2: 2020-09-09
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Database references, Other