6P6W

Cryo-EM structure of voltage-gated sodium channel NavAb N49K/L109A/M116V/G94C/Q150C disulfide crosslinked mutant in the resting state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Resting-State Structure and Gating Mechanism of a Voltage-Gated Sodium Channel.

Wisedchaisri, G.Tonggu, L.McCord, E.Gamal El-Din, T.M.Wang, L.Zheng, N.Catterall, W.A.

(2019) Cell 178: 993

  • DOI: 10.1016/j.cell.2019.06.031
  • Primary Citation of Related Structures:  
    6P6W, 6P6Y, 6P6X

  • PubMed Abstract: 
  • Voltage-gated sodium (Na V ) channels initiate action potentials in nerve, muscle, and other electrically excitable cells. The structural basis of voltage gating is uncertain because the resting state exists only at deeply negative membrane potentials ...

    Voltage-gated sodium (Na V ) channels initiate action potentials in nerve, muscle, and other electrically excitable cells. The structural basis of voltage gating is uncertain because the resting state exists only at deeply negative membrane potentials. To stabilize the resting conformation, we inserted voltage-shifting mutations and introduced a disulfide crosslink in the VS of the ancestral bacterial sodium channel Na V Ab. Here, we present a cryo-EM structure of the resting state and a complete voltage-dependent gating mechanism. The S4 segment of the VS is drawn intracellularly, with three gating charges passing through the transmembrane electric field. This movement forms an elbow connecting S4 to the S4-S5 linker, tightens the collar around the S6 activation gate, and prevents its opening. Our structure supports the classical "sliding helix" mechanism of voltage sensing and provides a complete gating mechanism for voltage sensor function, pore opening, and activation-gate closure based on high-resolution structures of a single sodium channel protein.


    Organizational Affiliation

    Department of Pharmacology, University of Washington, Seattle, WA 98195, USA. Electronic address: wcatt@uw.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fusion of Maltose-binding protein and voltage-gated sodium channel NavAbA, B, C, D661Escherichia coli K-12Aliarcobacter butzleri RM4018
This entity is chimeric
Mutation(s): 6 
Gene Names: malEBX06_05300Abu_1752
Membrane Entity: Yes 
UniProt
Find proteins for A8EVM5 (Arcobacter butzleri (strain RM4018))
Explore A8EVM5 
Go to UniProtKB:  A8EVM5
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Explore P0AEX9 
Go to UniProtKB:  P0AEX9
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01 NS015751
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesR01 HL112808
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesT32 GM007750
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2019-08-14
    Type: Initial release
  • Version 1.1: 2019-08-21
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-20
    Changes: Author supporting evidence
  • Version 1.3: 2019-12-18
    Changes: Other