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SNAREs and Membrane Fusion

SNAREs and Membrane Fusion

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.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...

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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.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...

Fluid Mosaic Model

Fluid Mosaic Model

Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...

Fluid Mosaic Model

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Related Experiment Video

Updated: Jun 25, 2026

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

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

Published on: August 24, 2016

A reduced SNARE model for membrane fusion.

Hana Robson Marsden¹, Nina A Elbers, Paul H H Bomans

¹Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA, Leiden, The Netherlands.

Angewandte Chemie (International Ed. in English)

|February 18, 2009

Summary

Researchers created a minimal model system to study membrane fusion. This system uses synthetic peptides to drive liposome fusion, mimicking biological processes like SNARE-protein interactions.

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Last Updated: Jun 25, 2026

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

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Published on: August 24, 2016

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Analysis of SNARE-mediated Membrane Fusion Using an Enzymatic Cell Fusion Assay

Analysis of SNARE-mediated Membrane Fusion Using an Enzymatic Cell Fusion Assay

Published on: October 19, 2012

Area of Science:

Biochemistry
Biophysics
Membrane Biology

Background:

Biological membrane fusion is essential for cellular processes.
SNARE proteins mediate in vivo membrane fusion.
Understanding fusion mechanisms requires simplified model systems.

Purpose of the Study:

To develop a minimal model system for studying membrane fusion.
To mimic SNARE-protein-mediated fusion using synthetic components.
To investigate the role of specific molecular interactions in driving membrane fusion.

Main Methods:

A minimal model system using liposomes was constructed.
Complementary, lipidated oligopeptides were designed to form coiled-coil complexes.
Noncovalent interactions between peptides were utilized to induce membrane proximity and fusion.

Main Results:

The model system successfully induced fusion between liposome populations.
The synthetic peptides effectively brought membranes into close proximity.
The observed fusion events shared key characteristics with in vivo biological fusion.

Conclusions:

A novel minimal model system effectively recapitulates key features of biological membrane fusion.
Synthetic peptide-driven interactions can serve as a viable mechanism to control membrane fusion.
This model system provides a platform for further investigation into the biophysics of membrane fusion.