Enables calcium-dependent phospholipid binding activity and syntaxin binding activity. Predicted to be involved in several processes, including positive regulation of dendrite extension; regulation of secretion by cell; and synaptic vesicle cycle. Located in terminal bouton. Is integral component of synaptic vesicle membrane. Human ortholog(s) of this gene implicated in congenital myasthenic syndrome and congenital myasthenic syndrome 7. Orthologous to human SYT2 (synaptotagmin 2). [provided by Alliance of Genome Resources, Apr 2022]