6P6X

Crystal structure of voltage-gated sodium channel NavAb G94C/Q150C mutant in the activated state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.0 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 --: --

  • DOI: 10.1016/j.cell.2019.06.031
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Voltage-gated sodium (Na <sub>V </sub>) 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 membran ...

    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.,Department of Pharmacology, University of Washington, Seattle, WA 98195, USA; Department of Biological Structure, University of Washington, Seattle, WA 98195, USA.,Department of Biological Structure, University of Washington, Seattle, WA 98195, USA.,Department of Pharmacology, University of Washington, Seattle, WA 98195, USA; Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA. Electronic address: nzheng@uw.edu.,Department of Pharmacology, University of Washington, Seattle, WA 98195, USA. Electronic address: wcatt@uw.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ion transport protein
A
257Arcobacter butzleri (strain RM4018)Mutation(s): 2 
Find proteins for A8EVM5 (Arcobacter butzleri (strain RM4018))
Go to UniProtKB:  A8EVM5
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PX4
Query on PX4

Download SDF File 
Download CCD File 
A
1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
C36 H73 N O8 P
CITHEXJVPOWHKC-UUWRZZSWSA-O
 Ligand Interaction
CPS
Query on CPS

Download SDF File 
Download CCD File 
A
3-[(3-CHOLAMIDOPROPYL)DIMETHYLAMMONIO]-1-PROPANESULFONATE
CHAPS
C32 H58 N2 O7 S
UMCMPZBLKLEWAF-BCTGSCMUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.213 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 124.449α = 90.00
b = 124.449β = 90.00
c = 193.339γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
Cootmodel building
HKL-2000data scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and StrokeUnited StatesR01 NS015751
National Institutes of Health/National Heart, Lung, and Blood InstituteUnited StatesR01 HL112808
National Institutes of Health/National Institute of General Medical SciencesUnited StatesT32 GM007750
Howard Hughes Medical InstituteUnited States--

Revision History 

  • Version 1.0: 2019-08-14
    Type: Initial release