5DU1

Crystal structure of Dendroaspis polylepis mambalgin-1 wild-type in P21 space group.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mambalgin-1 Pain-relieving Peptide, Stepwise Solid-phase Synthesis, Crystal Structure, and Functional Domain for Acid-sensing Ion Channel 1a Inhibition.

Mourier, G.Salinas, M.Kessler, P.Stura, E.A.Leblanc, M.Tepshi, L.Besson, T.Diochot, S.Baron, A.Douguet, D.Lingueglia, E.Servent, D.

(2016) J.Biol.Chem. 291: 2616-2629

  • DOI: 10.1074/jbc.M115.702373
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mambalgins are peptides isolated from mamba venom that specifically inhibit a set of acid-sensing ion channels (ASICs) to relieve pain. We show here the first full stepwise solid phase peptide synthesis of mambalgin-1 and confirm the biological activ ...

    Mambalgins are peptides isolated from mamba venom that specifically inhibit a set of acid-sensing ion channels (ASICs) to relieve pain. We show here the first full stepwise solid phase peptide synthesis of mambalgin-1 and confirm the biological activity of the synthetic toxin both in vitro and in vivo. We also report the determination of its three-dimensional crystal structure showing differences with previously described NMR structures. Finally, the functional domain by which the toxin inhibits ASIC1a channels was identified in its loop II and more precisely in the face containing Phe-27, Leu-32, and Leu-34 residues. Moreover, proximity between Leu-32 in mambalgin-1 and Phe-350 in rASIC1a was proposed from double mutant cycle analysis. These data provide information on the structure and on the pharmacophore for ASIC channel inhibition by mambalgins that could have therapeutic value against pain and probably other neurological disorders.


    Organizational Affiliation

    From the Commissariat à l'Energie Atomique, iBiTecS, Service d'Ingénierie Moléculaire des Protéines, 91191 Gif-sur-Yvette.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mambalgin-1
A, B, C, D
57Dendroaspis polylepis polylepisMutation(s): 0 
Find proteins for P0DKR6 (Dendroaspis polylepis polylepis)
Go to UniProtKB:  P0DKR6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 39.030α = 90.00
b = 50.240β = 93.38
c = 46.880γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
XDSdata reduction
MOLREPphasing
Cootmodel building
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-30
    Type: Initial release
  • Version 1.1: 2016-02-17
    Type: Database references