Vesicle Formation
Vesicle Formation - Related Videos
08:36
FM Dyes in Vesicle Recycling
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2023
FM dyes are a class of fluorescent molecules that has found important use in studying the vesicle recycling process. By virtue of a chemical structure, these molecules can insert themselves into the outer leaflet of phospholipid bilayer membranes. After membrane insertion, they are internalized into the cell via endocytosed vesicles, and released when these vesicles recycle back to the membrane. Since, these dyes fluoresce strongly in the hydrophobic environment within membranes and weakly in...
08:35
Lipid Bilayer Vesicle Generation Using Microfluidic Jetting
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Cited by 16 •
2014
Microfluidic jetting against a droplet interface lipid bilayer provides a reliable way to generate vesicles with control over membrane asymmetry, incorporation of transmembrane proteins, and encapsulation of material. This technique can be applied to study a variety of biological systems where compartmentalized biomolecules are desired.
06:26
Pulling Membrane Nanotubes from Giant Unilamellar Vesicles
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Cited by 42 •
2017
Many proteins in the cell sense and induce membrane curvature. We describe a method to pull membrane nanotubes from lipid vesicles to study the interaction of proteins or any curvature-active molecule with curved membranes in vitro.
02:50
Recombinant Protein Production and Recovery from Bacteria-Derived Vesicles
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2025
Source: Streather, B. R., et al. Optimized Production and Analysis of Recombinant Protein-Filled Vesicles from E. coli. J. Vis. Exp. (2023)This video demonstrates the production and isolation of recombinant proteins tagged with Vesicle Nucleating Peptide (VNp) from bacterial vesicles. An inducer triggers VNp-tagged protein expression, driving vesicle formation and encapsulation, followed by centrifugation and sonication for efficient protein recovery without cell...
03:31
Immunological Synapse Formation Between Helper T Cells and Antigen-Presenting Cells
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2025
This video demonstrates the in vitro study of immunological synapse formation between an antigen-presenting cell and helper T lymphocytes using a fluorescence microscope. T cell receptors of helper T lymphocytes interact with an antigen-MHC-II complex in antigen-presenting cells and form immunological synapses, followed by secretory vesicle movements toward the synapse, which is visualized by fluorescent microscopy.
FAQs
Coat proteins and associated factors initiate formation at selected membrane sites, where they help recognize and concentrate cargo. This local enrichment supports bending of the lipid bilayer into a bud. As the bud develops, the coat and associated machinery coordinate membrane remodeling, ensuring that selected materials enter the compartment rather than remaining broadly distributed across the membrane.
Membrane scission releases a developing bud from its original membrane, creating a separate transport compartment. Fusion occurs later, when that compartment joins its target membrane and delivers its contents. These steps perform different functions: scission generates a mobile vesicle, whereas fusion connects the vesicle with the destination needed for cargo delivery.
Cargo selection determines which proteins, lipids, or other materials become concentrated at the budding site. Coat proteins and associated factors help organize this selection before membrane bending occurs. As a result, vesicle formation supports targeted delivery rather than nonspecific movement, helping cells maintain distinct organelle contents and direct materials to appropriate destinations.
A conceptual workflow starts with cargo selection and concentration at a membrane site. Coat proteins and associated factors then promote bilayer bending, producing a bud that remains connected until membrane scission. After release, the vesicle moves toward its target membrane and fusion delivers its contents. This sequence links molecular assembly to selective transport.
The same basic process supports distinct cellular routes. In secretion, vesicles deliver materials for release outside the cell; in endocytosis, membrane uptake brings materials inward; and in intracellular trafficking, vesicles deliver proteins and lipids to specific organelles. Comparing these routes clarifies how one membrane-remodeling mechanism can support outward transport, inward uptake, and internal distribution.
Vesicle formation contributes to membrane homeostasis by supporting controlled movement of membrane components and cargo. It also underlies cell signaling and development because cells must deliver materials to appropriate locations at appropriate stages. When trafficking is defective, disrupted transport can affect these functions and is associated with disease, linking membrane dynamics with cellular physiology and pathology.