Snare Complex
Snare Complex - Related Videos
09:19
Analysis of SNARE-mediated Membrane Fusion Using an Enzymatic Cell Fusion Assay
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2012
We have developed a cell fusion assay that quantifies SNARE-mediated membrane fusion events by activated expression of β-galactosidase.
01:43
SNAREs and Membrane Fusion
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2023
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...
10:58
SNARE-mediated Fusion of Single Proteoliposomes with Tethered Supported Bilayers in a Microfluidic Flow Cell Monitored by Polarized TIRF Microscopy
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Cited by 8 •
2016
Here, we present a protocol to detect single, SNARE-mediated fusion events between liposomes and supported bilayers in microfluidic channels using polarized TIRFM, with single molecule sensitivity and ~15 msec time resolution. Lipid and soluble cargo release can be detected simultaneously. Liposome size, lipid diffusivity, and fusion pore properties are measured.
08:55
Visualizing Intracellular SNARE Trafficking by Fluorescence Lifetime Imaging Microscopy
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Cited by 5 •
2017
This protocol describes a new method allowing for the quantitative visualization of complex formation of SNARE proteins, based on Förster resonance energy transfer, and fluorescence lifetime imaging microscopy.
08:42
Coordination Chemistry Complexes
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2023
Source: Laboratory of Dr. Neal Abrams — SUNY College of Environmental Science and Forestry Transition metals are found everywhere from vitamin supplements to electroplating baths. Transition metals also make up the pigments in many paints and compose all minerals. Typically, transition metals are found in the cationic form since they readily oxidize, or lose electrons, and are surrounded by electron donors called ligands. These ligands do not form ionic or covalent bonds with the metal center,...
FAQs
Progressive zippering converts the assembly of the SNARE proteins into mechanical force. As the four helices wind together, the vesicle and target membranes are drawn into close proximity rather than remaining separated by the space between them. This close apposition supports formation of a fusion pore, creating an opening through which vesicle cargo can be released.
The four-helix bundle provides the structural framework that links vesicle-associated and target-membrane SNAREs during assembly. Its tight winding helps stabilize the paired proteins while bringing the two membranes together. Because membrane proximity is a necessary step before pore formation, this architecture connects molecular assembly with the physical event of cargo delivery.
v-SNAREs contribute the vesicle-associated part of the pairing, whereas t-SNAREs contribute the complementary target-membrane part. Their interaction organizes the proteins into one tightly wound complex spanning the two membrane surfaces. This division of location helps connect a specific transport vesicle with its intended target before fusion and release occur.
In neurons, SNARE-mediated membrane fusion provides the molecular basis for synaptic vesicle exocytosis. Assembly and zippering bring a neurotransmitter-containing vesicle into the membrane at a communication site, where fusion-pore formation allows transmitter release. The same core mechanism therefore links intracellular protein interactions with rapid signaling between nerve cells.
SNARE-mediated fusion supports several forms of intracellular transport and secretion beyond neuronal communication. It contributes to hormone secretion, membrane recycling, and movement between organelles, while also supporting communication between cells. These applications reflect a shared requirement: membranes must merge in a controlled way so that vesicle cargo reaches the appropriate destination.
Investigating SNARE complexes can connect defects in membrane fusion with broader cellular dysfunction. If the assembly, zippering, or fusion-pore stage is disrupted, vesicle trafficking, secretion, recycling, or synaptic release may be affected. For this reason, SNARE research helps relate molecular membrane-fusion events to disorders associated with impaired intracellular transport and communication.