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Related Experiment Videos

The endoplasmic reticulum Ca2+ store: a view from the lumen

J Meldolesi1, T Pozzan

  • 1Department of Pharmacology, B. Ceccarelli Center of Neurobiology, University of Milano, Italy.

Trends in Biochemical Sciences
|March 28, 1998
PubMed
Summary

The endoplasmic reticulum (ER) stores calcium ions (Ca2+), crucial for cell function. This review explores ER Ca2+ storage properties and functions regulated by these vital cellular calcium stores.

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Cell calcium·2010

Area of Science:

  • Cell Biology
  • Biochemistry
  • Physiology

Background:

  • The endoplasmic reticulum (ER) is a critical organelle for cellular calcium (Ca2+) homeostasis.
  • Specialized ER compartments, like the sarcoplasmic reticulum, serve as major dynamic Ca2+ reservoirs.
  • Cellular processes are intricately linked to free Ca2+ concentrations within the ER.

Purpose of the Study:

  • To elucidate the fundamental properties of Ca2+ storage within the ER.
  • To review cellular functions regulated by ER-localized Ca2+ stores.
  • To explore the spatial regulation of ER Ca2+ in cellular signaling.

Main Methods:

  • Literature review of endoplasmic reticulum Ca2+ dynamics.
  • Analysis of Ca2+ storage mechanisms in various cell types.

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  • Integration of data on Ca2+ signaling pathways.

    • Main Results:

    • The ER exhibits diverse Ca2+ buffering capacities.
    • ER Ca2+ levels directly influence numerous cellular activities.
    • Ca2+ signaling originates from and is modulated by ER Ca2+ stores.

    Conclusions:

    • Understanding ER Ca2+ storage is key to comprehending cellular regulation.
    • ER Ca2+ dynamics play a central role in both local and distal cellular functions.
    • Further research into ER Ca2+ regulation can reveal therapeutic targets.