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Related Experiment Video

Updated: Feb 6, 2026

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins

Published on: June 26, 2018

A Presynaptic Liquid Phase Unlocks the Vesicle Cluster.

Shan Shan H Wang¹, Pascal S Kaeser¹

¹Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.

Trends in Neurosciences

|August 9, 2018

Summary

Synapsin proteins drive liquid-liquid phase separation, clustering synaptic vesicles within nerve terminals. This mechanism provides a fluid-like state crucial for dynamic presynaptic vesicle traffic and neurotransmission.

Keywords:

active zone phase separation synapse synapsin synaptic vesicle vesicle tethering

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Last Updated: Feb 6, 2026

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins

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Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

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Published on: January 4, 2010

Area of Science:

Neuroscience
Cell Biology
Biophysics

Background:

Synaptic vesicles store neurotransmitters for neuronal communication.
The precise mechanisms organizing synaptic vesicles at the presynaptic terminal remain incompletely understood.
Efficient vesicle clustering is vital for rapid and sustained neurotransmission.

Purpose of the Study:

To elucidate the molecular mechanism by which synapsin proteins cluster synaptic vesicles.
To investigate the role of liquid-liquid phase separation in presynaptic organization.

Main Methods:

Biochemical assays to study synapsin protein behavior.
Advanced microscopy techniques to visualize vesicle clustering.
In vitro reconstitution of phase separation.

Main Results:

Synapsin proteins undergo liquid-liquid phase separation.
This phase separation results in the formation of a liquid-like condensate that clusters synaptic vesicles.
The condensate exhibits dynamic properties essential for vesicle trafficking.

Conclusions:

Synapsin-mediated liquid-liquid phase separation is a key mechanism for synaptic vesicle clustering.
This process establishes a dynamic, fluid-like compartment at the presynaptic terminal.
This finding offers a new perspective on the regulation of neurotransmitter release.