3ZKT

SOLUTION STRUCTURE OF THE SOMATOSTATIN SST3 RECEPTOR ANTAGONIST TAU- CONOTOXIN CnVA


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Identification, Structural and Pharmacological Characterization of Tau-Cnva, a Conopeptide that Selectively Interacts with Somatostatin Sst3 Receptor.

Petrel, C.Hocking, H.G.Reynaud, M.Upert, G.Favreau, P.Biass, D.Paolini-Bertrand, M.Peigneur, S.Tytgat, J.Gilles, N.Hartley, O.Boelens, R.Stocklin, R.Servent, D.

(2013) Biochem Pharmacol 85: 1663

  • DOI: https://doi.org/10.1016/j.bcp.2013.03.019
  • Primary Citation of Related Structures:  
    3ZKT

  • PubMed Abstract: 

    Conopeptides are a diverse array of small linear and reticulated peptides that interact with high potency and selectivity with a large diversity of receptors and ion channels. They are used by cone snails for prey capture or defense. Recent advances in venom gland transcriptomic and venom peptidomic/proteomic technologies combined with bioactivity screening approaches lead to the identification of new toxins with original pharmacological profiles. Here, from transcriptomic/proteomic analyses of the Conus consors cone snail, we identified a new conopeptide called τ-CnVA, which displays the typical cysteine framework V of the T1-conotoxin superfamily. This peptide was chemically synthesized and its three-dimensional structure was solved by NMR analysis and compared to that of TxVA belonging to the same family, revealing very few common structural features apart a common orientation of the intercysteine loop. Because of the lack of a clear biological function associated with the T-conotoxin family, τ-CnVA was screened against more than fifty different ion channels and receptors, highlighting its capacity to interact selectively with the somatostatine sst3 receptor. Pharmacological and functional studies show that τ-CnVA displays a micromolar (Ki of 1.5μM) antagonist property for the sst3 receptor, being currently the only known toxin to interact with this GPCR subfamily.


  • Organizational Affiliation

    CEA, iBiTecS, Service d'Ingénierie Moléculaire des Protéines, Laboratoire de Toxinologie Moléculaire et Biotechnologies, Gif-sur-Yvette, France.


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TAU-CNVA15Conus consorsMutation(s): 0 
UniProt
Find proteins for P0DJL6 (Conus consors)
Explore P0DJL6 
Go to UniProtKB:  P0DJL6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DJL6
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-24
    Type: Initial release
  • Version 1.1: 2013-05-29
    Changes: Database references
  • Version 1.2: 2016-05-04
    Changes: Atomic model, Derived calculations, Other
  • Version 1.3: 2023-06-14
    Changes: Data collection, Database references, Derived calculations, Other