NMR solution structure of the Nav1.7 selective spider venom-derived peptide Pn3a

  • Classification: TOXIN
  • Organism(s): Theraphosidae
  • Mutation(s): No 

  • Deposited: 2016-08-30 Released: 2017-09-06 
  • Deposition Author(s): Rosengren, K.J., Armstrong, D.A., Vetter, I.
  • Funding Organization(s): Australian Research Council (ARC), National Health and Medical Research Council (NHMRC, Australia)

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: lowest energy and covalent geometry 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Pharmacological characterisation of the highly Na V 1.7 selective spider venom peptide Pn3a.

Deuis, J.R.Dekan, Z.Wingerd, J.S.Smith, J.J.Munasinghe, N.R.Bhola, R.F.Imlach, W.L.Herzig, V.Armstrong, D.A.Rosengren, K.J.Bosmans, F.Waxman, S.G.Dib-Hajj, S.D.Escoubas, P.Minett, M.S.Christie, M.J.King, G.F.Alewood, P.F.Lewis, R.J.Wood, J.N.Vetter, I.

(2017) Sci Rep 7: 40883-40883

  • DOI: https://doi.org/10.1038/srep40883
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Human genetic studies have implicated the voltage-gated sodium channel Na V 1.7 as a therapeutic target for the treatment of pain. A novel peptide, μ-theraphotoxin-Pn3a, isolated from venom of the tarantula Pamphobeteus nigricolor, potently inhibits Na V 1.7 (IC 50 0.9 nM) with at least 40-1000-fold selectivity over all other Na V subtypes. Despite on-target activity in small-diameter dorsal root ganglia, spinal slices, and in a mouse model of pain induced by Na V 1.7 activation, Pn3a alone displayed no analgesic activity in formalin-, carrageenan- or FCA-induced pain in rodents when administered systemically. A broad lack of analgesic activity was also found for the selective Na V 1.7 inhibitors PF-04856264 and phlotoxin 1. However, when administered with subtherapeutic doses of opioids or the enkephalinase inhibitor thiorphan, these subtype-selective Na V 1.7 inhibitors produced profound analgesia. Our results suggest that in these inflammatory models, acute administration of peripherally restricted Na V 1.7 inhibitors can only produce analgesia when administered in combination with an opioid.

  • Organizational Affiliation

    IMB Centre for Pain Research, Institute for Molecular Bioscience, 306 Carmody Rd (Building 80), The University of Queensland, St Lucia, Queensland, 4072, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mu-theraphotoxin-Pn3a35TheraphosidaeMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: lowest energy and covalent geometry 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Australian Research Council (ARC)Australia--
National Health and Medical Research Council (NHMRC, Australia)Australia--

Revision History  (Full details and data files)

  • Version 1.0: 2017-09-06
    Type: Initial release
  • Version 1.1: 2017-09-27
    Changes: Author supporting evidence
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2021-02-10
    Changes: Database references
  • Version 1.4: 2023-06-14
    Changes: Database references, Other