5VSN

Crystal structure of mouse ryanodine receptor 2 SPRY2 domain (1080-1253) disease mutant P1124L


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.44 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cardiac hypertrophy and arrhythmia in mice induced by a mutation in ryanodine receptor 2.

Alvarado, F.J.Bos, J.M.Yuchi, Z.Valdivia, C.R.Hernandez, J.J.Zhao, Y.T.Henderlong, D.S.Chen, Y.Booher, T.R.Marcou, C.A.Van Petegem, F.Ackerman, M.J.Valdivia, H.H.

(2019) JCI Insight 5

  • DOI: 10.1172/jci.insight.126544
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Hypertrophic cardiomyopathy (HCM) is triggered mainly by mutations in genes encoding sarcomeric proteins, but a significant proportion of patients lack a genetic diagnosis. We identified a novel mutation in the ryanodine receptor 2, RyR2-P1124L, in a ...

    Hypertrophic cardiomyopathy (HCM) is triggered mainly by mutations in genes encoding sarcomeric proteins, but a significant proportion of patients lack a genetic diagnosis. We identified a novel mutation in the ryanodine receptor 2, RyR2-P1124L, in a patient from a genotype-negative HCM cohort. The aim of this study was to determine whether RyR2-P1124L triggers functional and structural alterations in isolated RyR2 channels and whole hearts. We found that P1124L induces significant conformational changes in the SPRY2 domain of RyR2. Recombinant RyR2-P1124L channels displayed a cytosolic loss-of-function phenotype, which contrasted with a higher sensitivity to luminal [Ca2+], indicating a luminal gain-of-function. Homozygous mice for RyR2-P1124L showed mild cardiac hypertrophy, similar to the human patient. This phenotype, evident at 1 yr of age, was accompanied by an increase in the expression of calmodulin (CaM). P1124L mice also showed higher susceptibility to arrhythmia at 8 mo of age, before the onset of hypertrophy. RyR2-P1124L has a distinct cytosolic loss-of-function and a luminal gain-of-function phenotype. This bifunctionally-divergent behavior triggers arrhythmias and structural cardiac remodeling, and involves overexpression of calmodulin as a potential hypertrophic mediator. This study is relevant to continue elucidating the possible causes of genotype-negative HCM and the role of RyR2 in cardiac hypertrophy.


    Organizational Affiliation

    Department of Medicine, Division of Cardiovascular Medicine, and Cardiovascular Research Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ryanodine receptor 2
A
169Mus musculusMutation(s): 1 
Gene Names: Ryr2
Find proteins for E9Q401 (Mus musculus)
Go to UniProtKB:  E9Q401
NIH Common Fund Data Resources
IMPC  MGI:99685
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
K
Query on K

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.44 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.29α = 90
b = 66.23β = 90
c = 66.98γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
Cootmodel building
HKL-2000data reduction
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2019-06-12
    Changes: Data collection, Database references