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Vesicular Exocytosis Machinery (N/A)
- Target
- N/A
- Molecular classification
- Protein complex, Molecular machinery
01
Overview
The vesicular exocytosis machinery is a complex network of proteins and molecular complexes that mediate the fusion of intracellular vesicles with target membranes, releasing their contents. Key components include SNARE proteins (synaptobrevin, syntaxin, SNAP-25), accessory proteins (synaptotagmin, complexin, Munc18/nSec1, Munc13, Rab3 GTPase, exocyst complexes), and disassembly factors (NSF, SNAPs). This machinery is crucial for diverse cellular processes, including neurotransmitter release, hormone secretion, and immune cell degranulation. Dysregulation of exocytosis can contribute to various diseases, and it is targeted by several therapeutic interventions. In bacteria, outer-membrane vesicle-mediated exocytosis performs analogous functions.
- Other names
- Exocytosis machineryVesicle fusion machinerySecretory pathwaySynaptic vesicle release machinery
02
Mechanism of action
Variable depending on the specific drug and target within the machinery. Examples include SNARE cleavage by toxins, modulation of calcium influx, and interference with vesicle docking/priming.
03
Biological functions
Neurotransmitter releaseHormone secretionProtein secretionLipid secretionImmune cell degranulationMembrane trafficking
04
Disease associations
Neurological disordersEndocrine disordersImmune disordersInfectious diseases (bacterial OMVs)Cancer (metastasis)
05
Safety considerations
Dysregulation can lead to neurological disorders, endocrine imbalances, and immune dysfunction.Bacterial OMVs can contribute to pathogenicity and antibiotic resistance.Off-target effects of drugs affecting exocytosis can have broad consequences.
06
Interacting drugs
Botulinum toxin (targets SNAREs)
2 more in the full profile.
07
Biomarkers
Levels of secreted proteins/hormones/neurotransmittersExpression levels of SNARE proteins and accessory proteinsPresence of bacterial OMVs
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