Vesicular soluble NSF attachment protein receptor (v-SNARE) mediating vesicle docking and fusion to a specific acceptor cellular compartment. Functions in endoplasmic reticulum to Golgi transport; as part of a SNARE complex composed of GOSR1, GOSR2 and STX5. Functions in early/recycling endosome to TGN transport; as part of a SNARE complex composed of BET1L, GOSR1 and STX5. Has a S-palmitoyl transferase activity. Probably cycles through vesicles between Golgi and endosomes. The longin domain regulates palmitoylation and membrane targeting. Palmitoylated; catalyzes its own palmitoylation. Palmitoylation is required for Golgi targeting. Farnesylation is required for Golgi targeting. Belongs to the synaptobrevin family.