1P7B

Crystal structure of an inward rectifier potassium channel


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.65 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.295 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the potassium channel KirBac1.1 in the closed state.

Kuo, A.Gulbis, J.M.Antcliff, J.F.Rahman, T.Lowe, E.D.Zimmer, J.Cuthbertson, J.Ashcroft, F.M.Ezaki, T.Doyle, D.A.

(2003) Science 300: 1922-1926

  • DOI: 10.1126/science.1085028
  • Also Cited By: 2WLL

  • PubMed Abstract: 
  • The KirBac1.1 channel belongs to the inward-rectifier family of potassium channels. Here we report the structure of the entire prokaryotic Kir channel assembly, in the closed state, refined to a resolution of 3.65 angstroms. We identify the main acti ...

    The KirBac1.1 channel belongs to the inward-rectifier family of potassium channels. Here we report the structure of the entire prokaryotic Kir channel assembly, in the closed state, refined to a resolution of 3.65 angstroms. We identify the main activation gate and structural elements involved in gating. On the basis of structural evidence presented here, we suggest that gating involves coupling between the intracellular and membrane domains. This further suggests that initiation of gating by membrane or intracellular signals represents different entry points to a common mechanistic pathway.


    Organizational Affiliation

    University of Oxford, Department of Biochemistry, Laboratory of Molecular Biophysics, South Parks Road, Oxford OX1 3QU, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
integral membrane channel and cytosolic domains
A, B
333Burkholderia pseudomalleiN/A
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
KirBac1.1 Inward-Rectifier Potassium channel (closed state)
Find proteins for P83698 (Burkholderia pseudomallei)
Go to UniProtKB:  P83698
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.65 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.295 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 92.840α = 90.00
b = 105.620β = 90.00
c = 258.630γ = 90.00
Software Package:
Software NamePurpose
MLPHAREphasing
DMmodel building
MOSFLMdata reduction
SHELXSphasing
CNSrefinement
DMphasing
RAVEmodel building
CCP4data scaling
SCALAdata scaling
RAVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-17
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance