Required for the calcium-dependent exocytosis of signal sequence-containing cytokines such as CCL5. Probably acts in cooperation with the SNARE machinery. May play a role in accumulation of expanded polyglutamine (polyQ) protein huntingtin (HTT) in case of endoplasmic reticulum stress by inhibiting the endocytosis pathway.
Subcellular locations: Cell membrane, Golgi apparatus membrane, Golgi apparatus, Trans-Golgi network membrane, Recycling endosome membrane, Cytoplasmic vesicle, Secretory vesicle, Synaptic vesicle membrane
Mainly localizes in Golgi apparatus membrane. Upon calcium-triggered exocytosis, it translocates to the cell membrane. Highly enriched in synaptic vesicles (By similarity).
Expressed both by neuronal and non-neuronal tissues. Expressed in brain, stomach, thyroid, spinal cord, lymph node, trachea, adrenal gland, bone marrow and in the different parts of brain. In thyroid tissues, it is expressed by the follicular epithelial cells. In the adrenal gland tissues it is detected in the zona fasciculata of the cortex region (at protein level).