4JKQ

Crystal structure of the N-terminal region of the human ryanodine receptor 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insights into the human RyR2 N-terminal region involved in cardiac arrhythmias.

Borko, L.Bauerova-Hlinkova, V.Hostinova, E.Gasperik, J.Beck, K.Lai, F.A.Zahradnikova, A.Sevcik, J.

(2014) Acta Crystallogr.,Sect.D 70: 2897-2912

  • DOI: 10.1107/S1399004714020343

  • PubMed Abstract: 
  • Human ryanodine receptor 2 (hRyR2) mediates calcium release from the sarcoplasmic reticulum, enabling cardiomyocyte contraction. The N-terminal region of hRyR2 (amino acids 1-606) is the target of >30 arrhythmogenic mutations and contains a binding s ...

    Human ryanodine receptor 2 (hRyR2) mediates calcium release from the sarcoplasmic reticulum, enabling cardiomyocyte contraction. The N-terminal region of hRyR2 (amino acids 1-606) is the target of >30 arrhythmogenic mutations and contains a binding site for phosphoprotein phosphatase 1. Here, the solution and crystal structures determined under near-physiological conditions, as well as a homology model of the hRyR2 N-terminal region, are presented. The N-terminus is held together by a unique network of interactions among its three domains, A, B and C, in which the central helix (amino acids 410-437) plays a prominent stabilizing role. Importantly, the anion-binding site reported for the mouse RyR2 N-terminal region is notably absent from the human RyR2. The structure concurs with the differential stability of arrhythmogenic mutations in the central helix (R420W, I419F and I419F/R420W) which are owing to disparities in the propensity of mutated residues to form energetically favourable or unfavourable contacts. In solution, the N-terminus adopts a globular shape with a prominent tail that is likely to involve residues 545-606, which are unresolved in the crystal structure. Docking the N-terminal domains into cryo-electron microscopy maps of the closed and open RyR1 conformations reveals C(α) atom movements of up to 8 Å upon channel gating, and predicts the location of the leucine-isoleucine zipper segment and the interaction site for spinophilin and phosphoprotein phosphatase 1 on the RyR surface.


    Organizational Affiliation

    Department of Biochemistry and Structural Biology, Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ryanodine receptor 2
A
606Homo sapiensMutation(s): 0 
Gene Names: RYR2
Find proteins for Q92736 (Homo sapiens)
Go to Gene View: RYR2
Go to UniProtKB:  Q92736
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.224 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 75.450α = 90.00
b = 75.450β = 90.00
c = 248.840γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
MAR345dtbdata collection
MOLREPphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-02
    Type: Initial release
  • Version 1.1: 2014-11-12
    Type: Database references
  • Version 1.2: 2014-12-24
    Type: Database references