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Preparation of Synaptic Plasma Membrane and Postsynaptic Density Proteins Using a Discontinuous Sucrose Gradient
Published on: September 3, 2014
Label-free differential analysis of murine postsynaptic densities
Scott P Goulding1, Michael J Maccoss, Christine C Wu
1University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
Methods in Molecular Biology (Clifton, N.J.)
|April 30, 2013
Summary
This study details methods for isolating and analyzing postsynaptic density (PSD) proteins. The workflow enhances the identification of crucial receptors and signal transducers within the PSD proteome.
Area of Science:
- Neuroscience
- Proteomics
Background:
- The postsynaptic density (PSD) is crucial for synaptic function but challenging to study due to low protein abundance.
- Understanding PSD protein composition is key to deciphering synaptic plasticity and neurological disorders.
Purpose of the Study:
- To present a detailed methodology for enriching and performing label-free differential analysis of postsynaptic density (PSD) proteins.
- To optimize workflows for analyzing PSD proteomes and identifying key receptors and signal transducers.
Main Methods:
- Tissue homogenization and subcellular fractionation to isolate PSDs.
- Protein digestion followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS).
- Label-free quantitative proteomics for differential analysis.
Main Results:
- Successful enrichment of PSD proteins, enabling identification of low-abundant components.
- Optimized workflow for differential analysis of PSD proteomes.
- Facilitation of identification of receptors and signal transducers within the PSD.
Conclusions:
- Coupling fractionation with proteomics is effective for enriching low-abundance proteins in specific cellular localizations.
- This methodology provides a robust strategy for comparative analysis of PSD proteomes.
- The presented workflow aids in understanding the molecular basis of synaptic function.
