CADPS2
Domain
The PH domain is essential for regulated exocytosis and binds phospholipids.
Function
Calcium-binding protein involved in exocytosis of vesicles filled with neurotransmitters and neuropeptides. Probably acts upstream of fusion in the biogenesis or maintenance of mature secretory vesicles. Regulates neurotrophin release from granule cells leading to regulate cell differentiation and survival during cerebellar development. May specifically mediate the Ca(2+)-dependent exocytosis of large dense-core vesicles (DCVs) and other dense-core vesicles (By similarity).
Tissue Specificity
Widely expressed. Expressed in all adult and fetal tissues examined, with the strongest expression in kidney and pancreas. In brain, it is expressed at high levels in cerebellum, to a lesser degree in cerebral cortex, occipital pole, and frontal and temporal lobes. Only weakly expressed in medulla, spinal cord and putamen.
Cellular localization
- Cytoplasmic vesicle membrane
- Peripheral membrane protein
- Cytoplasmic side
- Synapse
- Membrane-associated to vesicles. Strongly enriched in synaptic fractions. Probably localizes to different vesicles compared to CADPS. Enriched on vesicular structures in the parallel fiber terminal of granule cells that are distinct from synaptic vesicles.
Alternative names
CAPS2, KIAA1591, CADPS2, Calcium-dependent secretion activator 2, Calcium-dependent activator protein for secretion 2, CAPS-2