2A79

Mammalian Shaker Kv1.2 potassium channel- beta subunit complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a mammalian voltage-dependent Shaker family K+ channel.

Long, S.B.Campbell, E.B.Mackinnon, R.

(2005) Science 309: 897-903

  • DOI: 10.1126/science.1116269
  • Also Cited By: 2R9R, 3LUT

  • PubMed Abstract: 
  • Voltage-dependent potassium ion (K+) channels (Kv channels) conduct K+ ions across the cell membrane in response to changes in the membrane voltage, thereby regulating neuronal excitability by modulating the shape and frequency of action potentials. ...

    Voltage-dependent potassium ion (K+) channels (Kv channels) conduct K+ ions across the cell membrane in response to changes in the membrane voltage, thereby regulating neuronal excitability by modulating the shape and frequency of action potentials. Here we report the crystal structure, at a resolution of 2.9 angstroms, of a mammalian Kv channel, Kv1.2, which is a member of the Shaker K+ channel family. This structure is in complex with an oxido-reductase beta subunit of the kind that can regulate mammalian Kv channels in their native cell environment. The activation gate of the pore is open. Large side portals communicate between the pore and the cytoplasm. Electrostatic properties of the side portals and positions of the T1 domain and beta subunit are consistent with electrophysiological studies of inactivation gating and with the possibility of K+ channel regulation by the beta subunit.


    Related Citations: 
    • Voltage Sensor of Kv1.2: Structural Basis of Electromechanical Coupling
      Long, S.B.,Campbell, E.B.,MacKinnon, R.
      (2005) Science --: --


    Organizational Affiliation

    Howard Hughes Medical Institute, Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Voltage-gated potassium channel beta-2 subunit
A
333Rattus norvegicusGene Names: Kcnab2 (Ckbeta2, Kcnb3)
EC: 1.1.1.-
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
Kv1.2 Voltage-gated potassium Channel
Find proteins for P62483 (Rattus norvegicus)
Go to UniProtKB:  P62483
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Potassium voltage-gated channel subfamily A member 2
B
499Rattus norvegicusGene Names: Kcna2
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
Kv1.2 Voltage-gated potassium Channel
Find proteins for P63142 (Rattus norvegicus)
Go to UniProtKB:  P63142
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
poly-unknown chain
C
52N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
poly-unknown chain
D
21N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
NAP
Query on NAP

Download SDF File 
Download CCD File 
A
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
C, D
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.222 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 113.605α = 90.00
b = 113.605β = 90.00
c = 260.473γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
MOLREPphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-07-12
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance