6PPC

Solution structure of conotoxin MiXXVIIA


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 15 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Conotoxin phi-MiXXVIIA from the Superfamily G2 Employs a Novel Cysteine Framework that Mimics Granulin and Displays Anti-Apoptotic Activity.

Jin, A.H.Dekan, Z.Smout, M.J.Wilson, D.Dutertre, S.Vetter, I.Lewis, R.J.Loukas, A.Daly, N.L.Alewood, P.F.

(2017) Angew. Chem. Int. Ed. Engl. 56: 14973-14976

  • DOI: 10.1002/anie.201708927

  • PubMed Abstract: 
  • Conotoxins are a large family of disulfide-rich peptides that contain unique cysteine frameworks that target a broad range of ion channels and receptors. We recently discovered the 33-residue conotoxin Φ-MiXXVIIA from Conus miles with a novel cystein ...

    Conotoxins are a large family of disulfide-rich peptides that contain unique cysteine frameworks that target a broad range of ion channels and receptors. We recently discovered the 33-residue conotoxin Φ-MiXXVIIA from Conus miles with a novel cysteine framework comprising three consecutive cysteine residues and four disulfide bonds. Regioselective chemical synthesis helped decipher the disulfide bond connectivity and the structure of Φ-MiXXVIIA was determined by NMR spectroscopy. The 3D structure displays a unique topology containing two β-hairpins that resemble the N-terminal domain of granulin. Similar to granulin, Φ-MiXXVIIA promotes cell proliferation (EC 50 17.85 μm) while inhibiting apoptosis (EC 50 2.2 μm). Additional framework XXVII sequences were discovered with homologous signal peptides that define the new conotoxin superfamily G2. The novel structure and biological activity of Φ-MiXXVIIA expands the repertoire of disulfide-rich conotoxins that recognize mammalian receptors.


    Organizational Affiliation

    Institut des Biomolécules Max Mousseron, UMR 5247, Université Montpellier, CNRS, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France.,Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland, 4072, Australia.,Centre for Biodiscovery and Molecular Development of Therapeutics, AITHM, James Cook University, Smithfield, Cairns, QLD, 4878, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Conopeptide phi-MiXXVIIA
A
33Conus milesMutation(s): 0 
Find proteins for A0A0E3SVE7 (Conus miles)
Go to UniProtKB:  A0A0E3SVE7
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 15 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research Council (ARC)AustraliaFT110100226

Revision History 

  • Version 1.0: 2019-08-14
    Type: Initial release
  • Version 1.1: 2020-01-01
    Type: Author supporting evidence, Data collection