1T3L

Structural Analysis of the Voltage-Dependent Calcium Channel Beta Subunit Functional Core in Complex with Alpha1 Interaction Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Analysis of Voltage-Dependent Calcium Channel Beta Subunit Functional Core and Its Complex with the Alpha1 Interaction Domain

Opatowsky, Y.Chen, C.-C.Campbell, K.P.Hirsch, J.A.

(2004) NEURON 42: 387-399

  • Primary Citation of Related Structures:  1T3S

  • PubMed Abstract: 
  • Voltage-dependent calcium channels (VDCC) are multiprotein assemblies that regulate the entry of extracellular calcium into electrically excitable cells and serve as signal transduction centers. The alpha1 subunit forms the membrane pore while the in ...

    Voltage-dependent calcium channels (VDCC) are multiprotein assemblies that regulate the entry of extracellular calcium into electrically excitable cells and serve as signal transduction centers. The alpha1 subunit forms the membrane pore while the intracellular beta subunit is responsible for trafficking of the channel to the plasma membrane and modulation of its electrophysiological properties. Crystallographic analyses of a beta subunit functional core alone and in complex with a alpha1 interaction domain (AID) peptide, the primary binding site of beta to the alpha1 subunit, reveal that beta represents a novel member of the MAGUK protein family. The findings illustrate how the guanylate kinase fold has been fashioned into a protein-protein interaction module by alteration of one of its substrate sites. Combined results indicate that the AID peptide undergoes a helical transition in binding to beta. We outline the mechanistic implications for understanding the beta subunit's broad regulatory role of the VDCC, particularly via the AID.


    Related Citations: 
    • Expression, Purification and Crystallization of a Functional Core of the Voltage-Dependent Calcium Channel Beta Subunit
      Opatowsky, Y.,Chomsky-Hecht, O.,Hirsch, J.A.
      () TO BE PUBLISHED --: --


    Organizational Affiliation

    Department of Biochemistry, Faculty of Life Sciences, Tel Aviv University, Ramat Aviv 69978, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dihydropyridine-sensitive L-type, calcium channel beta-2 subunit
A
337Oryctolagus cuniculusGene Names: CACNB2 (CACNLB2)
Find proteins for P54288 (Oryctolagus cuniculus)
Go to Gene View: CACNB2
Go to UniProtKB:  P54288
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Voltage-dependent L-type calcium channel alpha-1S subunit
B
18Oryctolagus cuniculusGene Names: CACNA1S (CACH1, CACNL1A3)
Find proteins for P07293 (Oryctolagus cuniculus)
Go to Gene View: CACNA1S
Go to UniProtKB:  P07293
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.221 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 72.775α = 90.00
b = 168.262β = 90.00
c = 34.233γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-25
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance