4F4L

Open Channel Conformation of a Voltage Gated Sodium Channel


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.49 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.271 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of a bacterial voltage-gated sodium channel pore reveals mechanisms of opening and closing.

McCusker, E.C.Bagneris, C.Naylor, C.E.Cole, A.R.D'Avanzo, N.Nichols, C.G.Wallace, B.A.

(2012) Nat Commun 3: 1102-1102

  • DOI: 10.1038/ncomms2077
  • Also Cited By: 5BZB, 4X8A, 4X89, 4X88, 4PA9, 4PA7, 4PA6, 4PA4, 4PA3, 4P9P, 4P9O, 4P30, 4P2Z, 4OXS, 4CBC, 3ZJZ

  • PubMed Abstract: 
  • Voltage-gated sodium channels are vital membrane proteins essential for electrical signalling; in humans, they are key targets for the development of pharmaceutical drugs. Here we report the crystal structure of an open-channel conformation of NavMs, ...

    Voltage-gated sodium channels are vital membrane proteins essential for electrical signalling; in humans, they are key targets for the development of pharmaceutical drugs. Here we report the crystal structure of an open-channel conformation of NavMs, the bacterial channel pore from the marine bacterium Magnetococcus sp. (strain MC-1). It differs from the recently published crystal structure of a closed form of a related bacterial sodium channel (NavAb) by having its internal cavity accessible to the cytoplasmic surface as a result of a bend/rotation about a central residue in the carboxy-terminal transmembrane segment. This produces an open activation gate of sufficient diameter to allow hydrated sodium ions to pass through. Comparison of the open and closed structures provides new insight into the features of the functional states present in the activation cycles of sodium channels and the mechanism of channel opening and closing.


    Organizational Affiliation

    Department of Crystallography, Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ion transport protein
A, B, C, D
112Magnetococcus marinus (strain ATCC BAA-1437 / JCM 17883 / MC-1)Mutation(s): 0 
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
Voltage-Gated Sodium Channel (NaV)
Find proteins for A0L5S6 (Magnetococcus marinus (strain ATCC BAA-1437 / JCM 17883 / MC-1))
Go to UniProtKB:  A0L5S6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.49 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.271 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 117.070α = 90.00
b = 74.080β = 118.26
c = 107.930γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
MOSFLMdata reduction
BUSTERrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-03
    Type: Initial release
  • Version 1.1: 2012-10-17
    Type: Database references