Three different views of the high resolution structure of a truncated neuronal SNARE complex. Legend: synaptobrevin-2 (red), Syntaxin-1 (pink), SNAP-25 (purple).
VAMP3 (known as cellubrevin) is ubiquitously expressed and participates in regulated and constitutive exocytosis as a constituent of secretory granules and secretory vesicles.
VAMP5 and VAMP7 participate in constitutive exocytosis.
VAMP5 is a constituent of secretory vesicles, myotubes and tubulovesicular structures.
VAMP7 is found both in secretory granules and endosomes.
VAMP8 (known as endobrevin) participates in endocytosis and is found in early endosomes. VAMP8 also participates the regulated exocytosis in pancreatic acinar cells.