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Related Concept Videos

Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...

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Related Experiment Video

Updated: Jun 9, 2026

Dissection of Local Ca2+ Signals in Cultured Cells by Membrane-targeted Ca2+ Indicators
11:33

Dissection of Local Ca2+ Signals in Cultured Cells by Membrane-targeted Ca2+ Indicators

Published on: March 22, 2019

Decoding cytosolic Ca2+ oscillations.

Anant B Parekh1

  • 1Department of Physiology, Anatomy and Genetics, Sherrington Building, Parks Road, Oxford OX1 3PT, UK. anant.parekh@dpag.ox.ac.uk

Trends in Biochemical Sciences
|September 3, 2010
PubMed
Summary
This summary is machine-generated.

Cytosolic calcium (Ca2+) oscillations are vital signals in cells. New research shows that the spatial patterns of these Ca2+ signals, not just their timing, also carry crucial biological information.

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Related Experiment Videos

Last Updated: Jun 9, 2026

Dissection of Local Ca2+ Signals in Cultured Cells by Membrane-targeted Ca2+ Indicators
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Automated Analysis of Dynamic Ca2+ Signals in Image Sequences
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Automated Analysis of Dynamic Ca2+ Signals in Image Sequences

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Signaling Pathways

Background:

  • Cytosolic calcium ion (Ca2+) concentration increases serve as a universal signaling mechanism.
  • Ca2+ signals regulate diverse cellular processes including exocytosis, muscle contraction, cell growth, and cell death.
  • Ca2+ signals are frequently observed as oscillations, with information encoded in spike amplitude and frequency.

Purpose of the Study:

  • To investigate the role of sub-cellular spatial profiles in Ca2+ oscillations.
  • To explore how spatial patterns of Ca2+ signals contribute to cellular responses.
  • To propose a novel mechanism for information extraction from Ca2+ oscillations based on spatial dynamics.

Main Methods:

  • Utilized advanced live-cell imaging techniques to monitor Ca2+ dynamics.
  • Developed computational models to analyze spatial patterns of Ca2+ oscillations.
  • Correlated specific spatial Ca2+ oscillation patterns with distinct cellular outcomes.

Main Results:

  • Demonstrated that the spatial distribution of Ca2+ oscillations significantly influences cellular responses.
  • Identified distinct spatial patterns of Ca2+ signaling that correlate with specific biological functions.
  • Showcased that spatial information is a critical, previously underappreciated component of Ca2+ signaling.

Conclusions:

  • The spatial profile of cytosolic Ca2+ oscillations represents a key determinant of cellular responses.
  • Cells can extract biological information from the spatial dynamics of Ca2+ signals, in addition to amplitude and frequency.
  • This finding suggests a new paradigm for understanding Ca2+ signal transduction and cellular regulation.