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Related Concept Videos

SNAREs and Membrane Fusion01:43

SNAREs and Membrane Fusion

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Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
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Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
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Tagging and Fusion Proteins01:24

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Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...
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Actin Polymerization01:42

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Actin polymerization occurs through the head-to-tail association of binding sites on monomeric actin or G-actin to form filamentous or F-actin. The polymerization can be divided into three phases ̶  nucleation, elongation, and steady-state phase.
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Vesicular Tubular Clusters01:45

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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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ATP and Macromolecule Synthesis01:28

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Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
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Related Experiment Video

Updated: Aug 8, 2025

SNARE-mediated Fusion of Single Proteoliposomes with Tethered Supported Bilayers in a Microfluidic Flow Cell Monitored by Polarized TIRF Microscopy
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Triggered Polymersome Fusion.

Stephen D P Fielden1, Matthew J Derry2, Alisha J Miller1

  • 1School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.

Journal of the American Chemical Society
|March 6, 2023
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate triggered polymersome fusion using a pH-sensitive chemical signal. This controlled membrane fusion advances synthetic nanotechnology and potential applications in nanomedicine.

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Area of Science:

  • Polymer chemistry
  • Synthetic nanotechnology
  • Biomimetic materials

Background:

  • Biological cells utilize phospholipid membrane fusion for material transport.
  • Controlled fusion of synthetic polymer membranes remains largely unexplored.
  • Potential applications exist in nanomedicine and smart materials.

Purpose of the Study:

  • To demonstrate triggered fusion of polymersomes.
  • To explore polymer-based membrane fusion as a communication method in synthetic systems.

Main Methods:

  • Polymersomes formed via ring-opening metathesis polymerization-induced self-assembly.
  • Fusion triggered by a specific chemical signal (pH change).
  • Characterization using dynamic light scattering, electron microscopy, and small-angle X-ray scattering (SAXS).

Main Results:

  • Successfully demonstrated triggered polymersome fusion.
  • Characterized polymersome structure and fusion dynamics using SAXS.
  • Showcased a pH-triggered mechanism for controlled fusion.

Conclusions:

  • Controlled polymer-based membrane fusion is achievable.
  • This work provides a foundation for life-like behaviors in synthetic nanotechnology.
  • Enables new possibilities for reagent trafficking and smart materials.