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Related Concept Videos

Fusion of Secretory Vesicles with the Plasma Membrane01:26

Fusion of Secretory Vesicles with the Plasma Membrane

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...
Exocytosis00:50

Exocytosis

Exocytosis is a process that releases molecules outside the cell. Like other bulk transport mechanisms, exocytosis requires energy.
Exocytosis is the opposite of endocytosis, which brings molecules inside the cell. Sometimes, the released materials are signaling molecules. For example, neurons typically use exocytosis to release neurotransmitters. Cells also use exocytosis to insert proteins such as ion channels into their cell membranes, secrete proteins for use in the extracellular matrix, or...
Exocytosis00:51

Exocytosis

Exocytosis is used to release material from cells. Like other bulk transport mechanisms, exocytosis requires energy.
Overview of Secretory Vesicles01:33

Overview of Secretory Vesicles

Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Clathrin Coated Vesicles01:12

Clathrin Coated Vesicles

Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
Vesicular Tubular Clusters01:45

Vesicular Tubular Clusters

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.
With the help of motor proteins such...

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Related Experiment Video

Updated: Jun 9, 2026

Measuring Synaptic Vesicle Endocytosis in Cultured Hippocampal Neurons
07:30

Measuring Synaptic Vesicle Endocytosis in Cultured Hippocampal Neurons

Published on: September 4, 2017

Cholesterol and synaptic vesicle exocytosis.

Patrizia Rosa1, Alessandra Fratangeli

  • 1CNR-Institute of Neuroscience and Department of Medical Pharmacology; University of Milan; Milan, Italy.

Communicative & Integrative Biology
|August 28, 2010
PubMed
Summary

Lipids, particularly cholesterol, impact brain function by influencing synaptic membrane structure and protein interactions. Regulating these lipid levels is crucial for synaptic activity and overall neurological health.

Keywords:
SNARE proteinscholesterolregulated exocytosissphingolipidssynapsessynaptic vesiclesvoltage dependent calcium channels

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Related Experiment Videos

Last Updated: Jun 9, 2026

Measuring Synaptic Vesicle Endocytosis in Cultured Hippocampal Neurons
07:30

Measuring Synaptic Vesicle Endocytosis in Cultured Hippocampal Neurons

Published on: September 4, 2017

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins
09:33

An Optical Assay for Synaptic Vesicle Recycling in Cultured Neurons Overexpressing Presynaptic Proteins

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Examination of Synaptic Vesicle Recycling Using FM Dyes During Evoked, Spontaneous, and Miniature Synaptic Activities
08:10

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Published on: March 31, 2014

Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Lipids affect synaptic function through effector protein signaling and by altering synaptic membrane properties.
  • Cholesterol is a key structural component of synaptic membranes, influencing lipid-lipid and protein-lipid interactions.

Purpose of the Study:

  • To explore the role of cholesterol in synaptic membrane organization and protein interactions.
  • To understand how cholesterol levels impact synaptic function.

Main Methods:

  • The study focuses on the known roles of lipids and cholesterol in synaptic membranes.
  • It reviews existing literature on cholesterol's involvement in membrane rafts and protein binding.

Main Results:

  • Cholesterol is enriched in synapses and synaptic vesicles, contributing to membrane rafts.
  • Cholesterol directly binds to many synaptic proteins and influences their interactions.
  • Regulation of cholesterol levels can significantly affect synaptic protein activity and function.

Conclusions:

  • Cholesterol plays a critical role in synaptic membrane organization and protein interactions.
  • Modulating cholesterol and lipid levels offers a potential avenue for influencing synaptic function.