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 1.2 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: 10.1016/j.bcp.2013.03.019

  • 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 ...

    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  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TAU-CNVA
A
15Conus consorsN/A
Find proteins for P0DJL6 (Conus consors)
Go to UniProtKB:  P0DJL6
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: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 
  • Olderado: 3ZKT Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-24
    Type: Initial release
  • Version 1.1: 2013-05-29
    Type: Database references
  • Version 1.2: 2016-05-04
    Type: Atomic model, Derived calculations, Other