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Postsynaptic calcium signaling microdomains in neurons.
Craig Blackstone1, Morgan Sheng
1Cellular Neurology Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Building 36, Room 5W21, 9000 Rockville Pike, Bethesda, MD 20892, USA. blackstc@ninds.nih.gov
Frontiers in Bioscience : a Journal and Virtual Library
|March 19, 2002
Summary
Calcium ions act as vital messengers in synaptic efficacy, with signaling microdomains organized by protein complexes in dendritic spines. These complexes precisely regulate calcium influx, efflux, and signal transduction, underpinning synaptic plasticity.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Calcium ions are critical for regulating synaptic efficacy.
- In postsynaptic neurons, calcium ions are tightly linked with calcium-dependent signaling in dendritic spines.
- Understanding these calcium dynamics is key to synaptic plasticity.
Purpose of the Study:
- To review the organization and regulation of calcium signaling microdomains.
- To highlight the molecular mechanisms of differential calcium signaling within dendritic spines.
- To emphasize the role of supramolecular complexes in postsynaptic calcium signaling.
Main Methods:
- Review of optical imaging studies.
- Analysis of physiological data.
- Integration of structural and biological findings.
Main Results:
- Calcium signaling microdomains are precisely organized within dendritic spines.
- Supramolecular complexes involving calcium influx, efflux, and signal transduction proteins are key regulators.
- These complexes orchestrate sophisticated postsynaptic calcium signaling.
Conclusions:
- The structural and functional features of these complexes are crucial for synaptic plasticity.
- Precise regulation of calcium signaling microdomains is essential for neuronal function.
- This review clarifies the molecular basis of calcium's role in synaptic efficacy.