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Updated: Jul 16, 2026
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Preparation of Synaptic Plasma Membrane and Postsynaptic Density Proteins Using a Discontinuous Sucrose Gradient
Published on: September 3, 2014
Molecular anatomy of the postsynaptic density
1Department of Cell Biology, School of Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8519, Japan. okabe.cbio@tmd.ac.jp
Molecular and Cellular Neurosciences
|February 27, 2007
Summary
The postsynaptic density (PSD) is a complex protein structure at excitatory synapses. This review details its molecular architecture, composition, and dynamics, crucial for synaptic function.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- The postsynaptic density (PSD) is a critical protein complex at excitatory synapses.
- It comprises numerous membranous and cytoplasmic proteins essential for synaptic function.
Purpose of the Study:
- To review the structure and molecular composition of the PSD.
- To elucidate the interactions between major PSD constituents.
- To present a current view of PSD molecular architecture and dynamics.
Main Methods:
- Review of biochemical and molecular biological studies.
- Integration of recent advancements in molecular biology, structural biology, and electrophysiology.
- Incorporation of quantitative analyses of PSD protein content.
Main Results:
- Identified key protein constituents including glutamate receptors, scaffolding proteins, and signaling molecules like calcium-calmodulin-dependent protein kinase II.
- Highlighted the role of scaffolding proteins in forming the PSD framework.
- Emphasized the dynamic translocation of signaling molecules in response to neuronal activity.
Conclusions:
- The PSD's molecular architecture is complex and dynamic.
- Understanding PSD composition and interactions is vital for synaptic signal transduction.
- Recent techniques provide high-sensitivity insights into PSD molecular dynamics.
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