Synaptic vesicle exocytosis machinery

The synaptic vesicle exocytosis machinery is an essential, highly conserved set of proteins that mediates the fusion of synaptic vesicles with the presynaptic plasma membrane in response to calcium entry, enabling neurotransmitter release at synapses. The core machinery includes SNARE proteins (synaptobrevin/VAMP, syntaxin, SNAP-25), the calcium sensor synaptotagmin, SM proteins (Munc18), and accessory regulators (complexin, Munc13). Dysregulation or poisoning of these proteins impairs neurotransmission, leading to neurological disease or paralysis. This target is not a single molecular entity, but a functional and mechanistic description of a multiprotein system. For structured drug discovery or therapeutic purposes, canonical targets within the machinery are individual proteins (e.g., “Synaptobrevin-2,” “SNAP-25,” “Synaptotagmin-1”). The category “synaptic vesicle exocytosis machinery” should not be used as a canonical drug target in most structured databases.

Other names

Neurotransmitter release apparatussynaptic vesicle fusion complex

Blockade of SNARE complex assembly (by neurotoxins such as botulinum and tetanus toxins, via proteolytic cleavage of SNARE proteins); Modulation of vesicle priming or fusion (in experimental tool drug/discovery literature)