2N9T

NMR solution structure of ProTx-II


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Interaction of Tarantula Venom Peptide ProTx-II with Lipid Membranes Is a Prerequisite for Its Inhibition of Human Voltage-gated Sodium Channel NaV1.7.

Henriques, S.T.Deplazes, E.Lawrence, N.Cheneval, O.Chaousis, S.Inserra, M.Thongyoo, P.King, G.F.Mark, A.E.Vetter, I.Craik, D.J.Schroeder, C.I.

(2016) J Biol Chem 291: 17049-17065

  • DOI: 10.1074/jbc.M116.729095
  • Primary Citation of Related Structures:  
    2N9T

  • PubMed Abstract: 
  • ProTx-II is a disulfide-rich peptide toxin from tarantula venom able to inhibit the human voltage-gated sodium channel 1.7 (hNaV1.7), a channel reported to be involved in nociception, and thus it might have potential as a pain therapeutic. ProTx-II acts by binding to the membrane-embedded voltage sensor domain of hNaV1 ...

    ProTx-II is a disulfide-rich peptide toxin from tarantula venom able to inhibit the human voltage-gated sodium channel 1.7 (hNaV1.7), a channel reported to be involved in nociception, and thus it might have potential as a pain therapeutic. ProTx-II acts by binding to the membrane-embedded voltage sensor domain of hNaV1.7, but the precise peptide channel-binding site and the importance of membrane binding on the inhibitory activity of ProTx-II remain unknown. In this study, we examined the structure and membrane-binding properties of ProTx-II and several analogues using NMR spectroscopy, surface plasmon resonance, fluorescence spectroscopy, and molecular dynamics simulations. Our results show a direct correlation between ProTx-II membrane binding affinity and its potency as an hNaV1.7 channel inhibitor. The data support a model whereby a hydrophobic patch on the ProTx-II surface anchors the molecule at the cell surface in a position that optimizes interaction of the peptide with the binding site on the voltage sensor domain. This is the first study to demonstrate that binding of ProTx-II to the lipid membrane is directly linked to its potency as an hNaV1.7 channel inhibitor.


    Organizational Affiliation

    From the Institute for Molecular Bioscience and c.schroeder@imb.uq.edu.au.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta/omega-theraphotoxin-Tp2aA30Thrixopelma pruriensMutation(s): 0 
UniProt
Find proteins for P83476 (Thrixopelma pruriens)
Explore P83476 
Go to UniProtKB:  P83476
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2N9T Olderado

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2015-12-08 
  • Released Date: 2016-07-06 
  • Deposition Author(s): Schroeder, C.I.

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-06
    Type: Initial release
  • Version 1.1: 2016-09-07
    Changes: Database references