4H37

Crystal structure of a voltage-gated K+ channel pore domain in a closed state in lipid membranes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.314 
  • R-Value Observed: 0.318 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of a Voltage-gated K+ Channel Pore Module in a Closed State in Lipid Membranes.

Santos, J.S.Asmar-Rovira, G.A.Han, G.W.Liu, W.Syeda, R.Cherezov, V.Baker, K.A.Stevens, R.C.Montal, M.

(2012) J Biol Chem 287: 43063-43070

  • DOI: 10.1074/jbc.M112.415091
  • Primary Citation of Related Structures:  
    4H37, 4H33

  • PubMed Abstract: 
  • Voltage-gated K(+) channels underlie the electrical excitability of cells. Each subunit of the functional tetramer consists of the tandem fusion of two modules, an N-terminal voltage-sensor and a C-terminal pore. To investigate how sensor coupling to ...

    Voltage-gated K(+) channels underlie the electrical excitability of cells. Each subunit of the functional tetramer consists of the tandem fusion of two modules, an N-terminal voltage-sensor and a C-terminal pore. To investigate how sensor coupling to the pore generates voltage-dependent channel opening, we solved the crystal structure and characterized the function of a voltage-gated K(+) channel pore in a lipid membrane. The structure of a functional channel in a membrane environment at 3.1 Å resolution establishes an unprecedented connection between channel structure and function. The structure is unique in delineating an ion-occupied ready to conduct selectivity filter, a confined aqueous cavity, and a closed activation gate, embodying a dynamic entity trapped in an unstable closed state.


    Organizational Affiliation

    Section of Neurobiology, Division of Biological Sciences, University of California San Diego, La Jolla, California 92093, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Lmo2059 proteinAB137Listeria monocytogenes EGD-eMutation(s): 1 
Gene Names: lmo2059
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
KvLm voltaged-gated potassium channel: C-terminal pore module
Find proteins for Q8Y5K1 (Listeria monocytogenes serovar 1/2a (strain ATCC BAA-679 / EGD-e))
Explore Q8Y5K1 
Go to UniProtKB:  Q8Y5K1
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.314 
  • R-Value Observed: 0.318 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.1α = 90
b = 80.67β = 90
c = 55.522γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
BUSTERrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-07
    Type: Initial release
  • Version 1.1: 2013-01-16
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description