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Related Concept Videos

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Reporter Genes02:11

Reporter Genes

Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
Commonly used reporter...

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Related Experiment Video

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Real-Time Fluorescent Measurement of Synaptic Functions in Models of Amyotrophic Lateral Sclerosis
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Imaging synaptic protein dynamics using photoactivatable green fluorescent protein.

Robby M Weimer, Travis C Hill, Andrew M Hamilton

    Cold Spring Harbor Protocols
    |July 4, 2012
    PubMed
    Summary

    This study details imaging methods to track synaptic protein dynamics in dendritic spines, crucial for understanding neural circuit plasticity and brain function. These techniques reveal how protein movement influences structural changes in learning and memory.

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    Area of Science:

    • Neuroscience
    • Cell Biology
    • Biophysics

    Background:

    • Structural plasticity of dendritic spines is fundamental to adaptive changes in cortical circuits.
    • Understanding spine dynamics is key to elucidating mechanisms of learning, memory, and neural circuit refinement.
    • Investigating synaptic protein dynamics and their role in spine structural plasticity is essential.

    Purpose of the Study:

    • To describe imaging approaches for studying synaptic protein dynamics in dendritic spines of the rodent cerebral cortex.
    • To provide a protocol for generating photoactivatable green fluorescent protein (PA-GFP)-tagged synaptic proteins.
    • To detail methods for tracking protein localization and spine structural plasticity.

    Main Methods:

    • Generation of photoactivatable green fluorescent protein (PA-GFP)-tagged synaptic proteins.
    • In vitro and in vivo transfection for coexpression with DsRed-Express cell-filling marker.
    • Photoactivation and time-lapse imaging of PA-GFP in spiny pyramidal neuron dendrites.

    Main Results:

    • Established methods for tracking synaptic protein localization and dynamics within dendritic spines.
    • Demonstrated the utility of PA-GFP tagging for visualizing protein movement in live neurons.
    • Provided a comprehensive protocol adaptable for studying neural circuit plasticity.

    Conclusions:

    • The described imaging protocol enables detailed investigation of synaptic protein dynamics.
    • This approach facilitates understanding the structural plasticity of dendritic spines.
    • The methods are applicable to studying neural circuit development and plasticity in the mammalian brain.