A convenient protocol for generating giant unilamellar vesicles containing SNARE proteins using electroformation

Area of Science:

• Biophysics
• Cell Biology
• Membrane Protein Research

Background:

• Reconstituting membrane proteins in artificial membranes is crucial for functional studies.
• Preparing large membranes with membrane proteins at biologically relevant concentrations is challenging.
• Giant unilamellar vesicles (GUVs) offer a large, low-curvature model system but are difficult for protein insertion.

Purpose of the Study:

• To describe a convenient and efficient method for generating GUVs containing functionally active SNARE proteins.
• To provide a platform for optimizing the preparation of proteo-GUVs for various applications.

Main Methods:

• Utilized a simple, in-house-built device with standard electronic equipment.
• Employed a straightforward protocol designed to minimize protein damage during GUV formation.
• Focused on the reconstitution of SNARE proteins, key regulators of synaptic vesicle exocytosis.

Main Results:

• Successfully generated proteo-GUVs containing active SNARE proteins.
• The protocol is amenable to upscaling and multiplexing.
• The method largely avoids damage to the incorporated proteins.

Conclusions:

• The developed method offers an efficient way to produce GUVs with functional membrane proteins.
• This technique facilitates the study of membrane protein function in a controlled, biomimetic environment.
• The platform supports the optimization of proteo-GUV preparation for diverse research needs.