4BGN

cryo-EM structure of the NavCt voltage-gated sodium channel


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 9 Å
  • Aggregation State: 2D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Two Alternative Conformations of a Voltage-Gated Sodium Channel.

Tsai, C.J.Tani, K.Irie, K.Hiroaki, Y.Shimomura, T.Mcmillan, D.G.Cook, G.M.Schertler, G.Fujiyoshi, Y.Li, X.D.

(2013) J.Mol.Biol. 425: 4074

  • DOI: 10.1016/j.jmb.2013.06.036

  • PubMed Abstract: 
  • Activation and inactivation of voltage-gated sodium channels (Navs) are well studied, yet the molecular mechanisms governing channel gating in the membrane remain unknown. We present two conformations of a Nav from Caldalkalibacillus thermarum recons ...

    Activation and inactivation of voltage-gated sodium channels (Navs) are well studied, yet the molecular mechanisms governing channel gating in the membrane remain unknown. We present two conformations of a Nav from Caldalkalibacillus thermarum reconstituted into lipid bilayers in one crystal at 9Å resolution based on electron crystallography. Despite a voltage sensor arrangement identical with that in the activated form, we observed two distinct pore domain structures: a prominent form with a relatively open inner gate and a closed inner-gate conformation similar to the first prokaryotic Nav structure. Structural differences, together with mutational and electrophysiological analyses, indicated that widening of the inner gate was dependent on interactions among the S4-S5 linker, the N-terminal part of S5 and its adjoining part in S6, and on interhelical repulsion by a negatively charged C-terminal region subsequent to S6. Our findings suggest that these specific interactions result in two conformational structures.


    Organizational Affiliation

    Paul Scherrer Institute, 5232 Villigen, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VOLTAGE-GATED SODIUM CHANNEL
A, B
298Caldalkalibacillus thermarum TA2.A1Mutation(s): 0 
Find proteins for F5L478 (Caldalkalibacillus thermarum TA2.A1)
Go to UniProtKB:  F5L478
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 9 Å
  • Aggregation State: 2D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 
Software Package:
Software NamePurpose
MRCdata scaling
MRCmodel building
CNSrefinement
MRCphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-10
    Type: Initial release
  • Version 1.1: 2013-07-17
    Type: Database references
  • Version 1.2: 2013-11-13
    Type: Database references