Function
Ca(2+) sensor specifically required for the Ca(2+)-dependent exocytosis of secretory vesicles containing IGF1 in neurons of the olfactory bulb (PubMed:21496647). Exocytosis of IGF1 is required for sensory perception of smell (PubMed:21496647). Not involved in Ca(2+)-dependent synaptic vesicle exocytosis (PubMed:21496647). Acts through Ca(2+) and phospholipid binding to the C2 domain: Ca(2+) induces binding of the C2-domains to phospholipid membranes and to assembled SNARE-complexes; both actions contribute to triggering exocytosis (By similarity).
Similarity
Belongs to the synaptotagmin family.
Sequence
MSFRKEDGVSSLCQKALHIITELCFAGQVEWDKCSGIFPADRSGQGGGGTDISVSLLAVVVSFCGLALLVVSLFVFWKLCWPCWKSKLVAPNLSVLPQSISSAPTEVFETEEKKEVEENEKPAPKAIEPAIKISHTSPDIPAEVQTALKEHLIKHARVQRQTTEPTSSSRHNSFRRHLPRQMNVSSVDFSVGTEPILQRGETRTSIGRIKPELYKQKSVDSEGNRKDDVKTCGKLNFALQYDYENELLVVKIIKALDLPAKDFTGTSDPYVKIYLLPDRKKKFQTRVHRKTLNPLFDELFQFPVVYDQLSNRKLHFSIYDFDRFSRHDMIGEVILDNLFEVSDLSREATVWKDIHCATTESIDLGEIMFSLCYLPTAGRMTLTVIKCRNLKAMDITGSSDPYVKVSLMCEGRRLKKRKTTTKKNTLNPVYNEAIIFDIPPENVDQVSLCIAVMDYDRVGHNEVIGVCRTGLDAEGLGRDHWNEMLAYHRKPITHWHPLLELPGRATSFDSQGSCSSPRPPSTP