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Updated: May 14, 2026

Crystal Structure of the N-terminal Domain of Ryanodine Receptor from Plutella xylostella
11:31

Crystal Structure of the N-terminal Domain of Ryanodine Receptor from Plutella xylostella

Published on: November 30, 2018

Ryanodine receptor calcium release channels: lessons from structure-function studies

Fernando J Amador1, Peter B Stathopulos, Masahiro Enomoto

  • 1Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, Canada.

The FEBS Journal
|February 19, 2013
PubMed

Insights

Ryanodine receptors (RyRs) are large Ca(2+) release channels linked to heart and muscle diseases. Recent structural studies of RyRs and IP3Rs offer insights for developing new treatments for calcium-signaling disorders.

Area of Science:

  • Molecular Biology
  • Structural Biology
  • Biophysics

Background:

  • Ryanodine receptors (RyRs) are the largest known ion channels, crucial for calcium (Ca2+) release in myocytes.
  • Hundreds of RyR mutations are linked to human skeletal and cardiomyocyte diseases.
  • Understanding RyR structure is key to addressing associated pathologies.

Purpose of the Study:

  • To analyze high-resolution structures of RyR domains and full-length tetrameric structures.
  • To investigate the evolutionary relationship between RyRs and inositol 1,4,5-trisphosphate receptors (IP3Rs).
  • To leverage structural insights for developing novel therapeutic strategies for Ca2+-related diseases.

Main Methods:

  • Cryo-electron microscopy (cryo-EM) to determine high-resolution structures.
  • Structural analysis of individual RyR domains and full-length tetramers.
  • Comparative structural analysis with IP3 receptors.

Main Results:

  • High-resolution structures of RyR domains and tetramers have been elucidated.
  • A conserved N-terminal structural architecture between RyRs and IP3Rs suggests a common ancestor.
  • Structural data provides a foundation for understanding disease-associated mutations.

Conclusions:

  • Recent structural studies of RyRs and IP3Rs offer significant functional insights.
  • These insights are crucial for developing targeted treatments for Ca2+-signaled diseases.
  • The evolutionary link between RyRs and IP3Rs highlights conserved mechanisms in Ca2+ signaling.
Keywords:
X-ray crystallographycryo-electron microscopyexcitation-contraction couplinginositol 1,4,5-trisphosphate receptormalignant hyperthermianuclear magnetic resonance spectroscopyryanodine receptor

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