7RW4

Crystal structure of junctophilin-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.31 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.137 
  • R-Value Observed: 0.138 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structures of the junctophilin/voltage-gated calcium channel interface reveal hot spot for cardiomyopathy mutations.

Yang, Z.F.Panwar, P.McFarlane, C.R.Tuinte, W.E.Campiglio, M.Van Petegem, F.

(2022) Proc Natl Acad Sci U S A 119: e2120416119-e2120416119

  • DOI: https://doi.org/10.1073/pnas.2120416119
  • Primary Citation of Related Structures:  
    7RW4, 7RXE, 7RXQ

  • PubMed Abstract: 

    SignificanceIon channels have evolved the ability to communicate with one another, either through protein-protein interactions, or indirectly via intermediate diffusible messenger molecules. In special cases, the channels are part of different membranes. In muscle tissue, the T-tubule membrane is in proximity to the sarcoplasmic reticulum, allowing communication between L-type calcium channels and ryanodine receptors. This process is critical for excitation-contraction coupling and requires auxiliary proteins like junctophilin (JPH). JPHs are targets for disease-associated mutations, most notably hypertrophic cardiomyopathy mutations in the JPH2 isoform. Here we provide high-resolution snapshots of JPH, both alone and in complex with a calcium channel peptide, and show how this interaction is targeted by cardiomyopathy mutations.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, The Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Junctophilin-1342Homo sapiensMutation(s): 0 
Gene Names: JPH1JP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HDC5 (Homo sapiens)
Explore Q9HDC5 
Go to UniProtKB:  Q9HDC5
PHAROS:  Q9HDC5
GTEx:  ENSG00000104369 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HDC5
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.31 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.137 
  • R-Value Observed: 0.138 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.076α = 90
b = 55.203β = 90
c = 142.447γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
SHELXCDphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)Canada--

Revision History  (Full details and data files)

  • Version 1.0: 2022-02-23
    Type: Initial release
  • Version 1.1: 2022-03-16
    Changes: Database references
  • Version 1.2: 2024-05-22
    Changes: Data collection