SYT3 (Synaptotagmin 3) is a Protein Coding gene. GO annotations related to this gene include calcium ion binding and syntaxin binding. An important paralog of this gene is SYT9.Ca(2+) sensor involved in Ca(2+)-dependent exocytosis of secretory vesicles 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). Plays a role in dendrite formation by melanocytes .