function:Plays a role in the control of regulated secretion in neural and endocrine cells, enhancing selectively low-frequency neurotransmission. Positively regulates vesicle fusion by maintaining the readily releasable pool of secretory vesicles.,miscellaneous:Identified as the brain binding-site for the antiepileptic drug levetiracetam/lev.,PTM:N-glycosylated.,PTM:Phosphorylation by CK1 of the N-terminal cytoplasmic domain regulates interaction with SYT1.,similarity:Belongs to the major facilitator superfamily.,subcellular location:Enriched in chromaffin granules, not present in adrenal microsomes. Associated with both insulin granules and synaptic-like microvesicles in insulin-secreting cells of the pancreas.,subunit:Interacts with SYT1/synaptotagmin-1 in a calcium-dependent manner. Binds the adapter protein complex AP-2.,
Cell junction, synapse, presynapse . Cytoplasmic vesicle, secretory vesicle, synaptic vesicle membrane ; Multi-pass membrane protein . Enriched in chromaffin granules, not present in adrenal microsomes. Associated with both insulin granules and synaptic-like microvesicles in insulin-secreting cells of the pancreas (By similarity). Colocalizes with ATP2B1 at photoreceptor synaptic terminals. .
Brain,Brain cortex,Ovary,Retina,Teratocarcinoma,
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