5IWN

Bacterial sodium channel pore domain, high bromide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.75 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Unfolding of a Temperature-Sensitive Domain Controls Voltage-Gated Channel Activation.

Arrigoni, C.Rohaim, A.Shaya, D.Findeisen, F.Stein, R.A.Nurva, S.R.Mishra, S.Mchaourab, H.S.Minor, D.L.

(2016) Cell 164: 922-936

  • DOI: 10.1016/j.cell.2016.02.001
  • Primary Citation of Related Structures:  5HJ8, 5HK6, 5HK7, 5HKD, 5HKT, 5HKU, 5IWO

  • PubMed Abstract: 
  • Voltage-gated ion channels (VGICs) are outfitted with diverse cytoplasmic domains that impact function. To examine how such elements may affect VGIC behavior, we addressed how the bacterial voltage-gated sodium channel (BacNa(V)) C-terminal cytoplasm ...

    Voltage-gated ion channels (VGICs) are outfitted with diverse cytoplasmic domains that impact function. To examine how such elements may affect VGIC behavior, we addressed how the bacterial voltage-gated sodium channel (BacNa(V)) C-terminal cytoplasmic domain (CTD) affects function. Our studies show that the BacNa(V) CTD exerts a profound influence on gating through a temperature-dependent unfolding transition in a discrete cytoplasmic domain, the neck domain, proximal to the pore. Structural and functional studies establish that the BacNa(V) CTD comprises a bi-partite four-helix bundle that bears an unusual hydrophilic core whose integrity is central to the unfolding mechanism and that couples directly to the channel activation gate. Together, our findings define a general principle for how the widespread four-helix bundle cytoplasmic domain architecture can control VGIC responses, uncover a mechanism underlying the diverse BacNa(V) voltage dependencies, and demonstrate that a discrete domain can encode the temperature-dependent response of a channel.


    Organizational Affiliation

    Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA 94158, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ion transport protein
A, B, C, D
152Alkalilimnicola ehrlichii (strain ATCC BAA-1101 / DSM 17681 / MLHE-1)N/A
Find proteins for Q0ABW0 (Alkalilimnicola ehrlichii (strain ATCC BAA-1101 / DSM 17681 / MLHE-1))
Go to UniProtKB:  Q0ABW0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BR
Query on BR

Download SDF File 
Download CCD File 
A
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.75 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.228 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 157.400α = 90.00
b = 160.870β = 90.00
c = 167.350γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-30
    Type: Initial release