4H33

Crystal structure of a voltage-gated K+ channel pore module in a closed state in lipid membranes, tetragonal crystal form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.281 

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:  

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lmo2059 protein
A
137Listeria monocytogenes serovar 1/2a (strain ATCC BAA-679 / EGD-e)Mutation(s): 1 
Membrane protein
mpstruct
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))
Go to UniProtKB:  Q8Y5K1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
OLC
Query on OLC

Download SDF File 
Download CCD File 
A
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
1-Oleoyl-R-glycerol
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.281 
  • Space Group: P 4 21 2
Unit Cell:
Length (Å)Angle (°)
a = 53.370α = 90.00
b = 53.370β = 90.00
c = 108.160γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data reduction
Blu-Icedata collection
HKL-2000data scaling
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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