May play a role in neurotransmitter secretion.
Subcellular locations: Cytoplasm, Cytosol, Golgi apparatus membrane, Cytoplasmic vesicle, Secretory vesicle membrane, Cytoplasmic vesicle, Secretory vesicle, Synaptic vesicle membrane
Predominantly cytosolic. Also exists as a membrane-bound form which has been found associated with synaptic vesicles and also with the Golgi complex and immature secretory granules.
Expressed abundantly in pancreas, heart and brain with low levels of expression in lung, kidney, liver and thyroid.