Related Experiment Video
Updated: May 14, 2026
09:13
In vivo Interrogation of Central Nervous System Translatome by Polyribosome Fractionation
Published on: April 30, 2014
RNA promotes synapsin phase separation providing a platform for local translation.
Branislava Rankovic1,2,3, Zachary M Geisterfer1,4, Akshita Chhabra1,2
1Whitman Center, Marine Biological Laboratory, 02543 Woods Hole, MA, USA.
Biorxiv : the Preprint Server for Biology
|May 13, 2026
Summary
Coding RNAs directly organize presynaptic condensates, crucial for synaptic vesicle (SV) clustering and neurotransmitter release. This study reveals RNA
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- Synaptic condensates organize synaptic vesicles (SVs) for efficient neurotransmitter release.
- The role of RNA within presynaptic structures remains largely unknown.
Purpose of the Study:
- To investigate the direct structural role of coding RNAs in organizing presynaptic condensates, specifically synapsin-1/SV clusters.
- To determine if RNA influences the formation and function of these condensates.
Main Methods:
- In vitro reconstitution assays to study synapsin-1 coacervation with RNA.
- Experiments in living synapses to assess the impact of RNA disruption on SV organization.
- In vitro translation assays using microscopy to evaluate translation efficiency within condensates.
Main Results:
- RNA drives synapsin-1 coacervation, with structured RNAs being more effective.
- Disruption of native RNA in synapses leads to dispersion of SVs and synapsin.
- Synapsin-1/RNA condensates recruit translational machinery and enhance translation efficiency.
Conclusions:
- Coding RNAs play a direct structural role in organizing presynaptic condensates.
- RNA is a key component in modulating SV clustering and synaptic function.
- These findings reveal a novel mechanism for regulating synaptic transmission.
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