1VYT

beta3 subunit complexed with aid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.231 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural Basis of the Alpha(1)-Beta Subunit Interaction of Voltage-Gated Ca(2+) Channels

Chen, Y.-H.Li, M.-H.Zhang, Y.He, L.-L.Yamada, Y.Fitzmaurice, A.Shen, Y.Zhang, H.Tong, L.Yang, J.

(2004) Nature 429: 675

  • DOI: https://doi.org/10.1038/nature02641
  • Primary Citation of Related Structures:  
    1VYT, 1VYU, 1VYV

  • PubMed Abstract: 

    High-voltage-activated Ca2+ channels are essential for diverse biological processes. They are composed of four or five subunits, including alpha1, alpha2-delta, beta and gamma (ref. 1). Their expression and function are critically dependent on the beta-subunit, which transports alpha1 to the surface membrane and regulates diverse channel properties. It is believed that the beta-subunit interacts with alpha1 primarily through the beta-interaction domain (BID), which binds directly to the alpha-interaction domain (AID) of alpha1; however, the molecular mechanism of the alpha1-beta interaction is largely unclear. Here we report the crystal structures of the conserved core region of beta3, alone and in complex with AID, and of beta4 alone. The structures show that the beta-subunit core contains two interacting domains: a Src homology 3 (SH3) domain and a guanylate kinase (GK) domain. The AID binds to a hydrophobic groove in the GK domain through extensive interactions, conferring extremely high affinity between alpha1 and beta-subunits. The BID is essential both for the structural integrity of and for bridging the SH3 and GK domains, but it does not participate directly in binding alpha1. The presence of multiple protein-interacting modules in the beta-subunit opens a new dimension to its function as a multi-functional protein.


  • Organizational Affiliation

    Department of Biological Sciences, Columbia University, New York, New York 10027, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CALCIUM CHANNEL BETA-3 SUBUNIT
A, B
351Rattus norvegicusMutation(s): 0 
UniProt
Find proteins for P54287 (Rattus norvegicus)
Explore P54287 
Go to UniProtKB:  P54287
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UniProt GroupP54287
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
VOLTAGE-DEPENDENT L-TYPE CALCIUM CHANNEL ALPHA-1C SUBUNITC [auth E],
D [auth F]
25Rattus norvegicusMutation(s): 0 
UniProt
Find proteins for P22002 (Rattus norvegicus)
Explore P22002 
Go to UniProtKB:  P22002
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22002
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.231 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 252.3α = 90
b = 69β = 96.7
c = 60.7γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
GCOMOphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-15
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description
  • Version 1.4: 2024-10-16
    Changes: Structure summary