2A79

Mammalian Shaker Kv1.2 potassium channel- beta subunit complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.222 
  • R-Value Observed: 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
  • Primary Citation of Related Structures:  
    2A79

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Voltage-gated potassium channel beta-2 subunitA333Rattus norvegicusMutation(s): 0 
Gene Names: Kcnab2Ckbeta2Kcnb3
EC: 1.1.1
Membrane protein
Mpstruc
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)
Explore P62483 
Go to UniProtKB:  P62483
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Potassium voltage-gated channel subfamily A member 2B499Rattus norvegicusMutation(s): 0 
Gene Names: Kcna2
Membrane protein
Mpstruc
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)
Explore P63142 
Go to UniProtKB:  P63142
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
poly-unknown chainC52Rattus norvegicusMutation(s): 0 
Gene Names: Kcna2
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
poly-unknown chainD21Rattus norvegicusMutation(s): 0 
Gene Names: Kcna2
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAP
Query on NAP

Download CCD File 
A
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
K
Query on K

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.605α = 90
b = 113.605β = 90
c = 260.473γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

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