Enables several functions, including calcium ion binding activity; calcium-dependent phospholipid binding activity; and syntaxin binding activity. Involved in calcium ion regulated lysosome exocytosis; plasma membrane repair; and regulation of secretion by cell. Located in dense core granule; lysosome; and plasma membrane. Is active in hippocampal mossy fiber to CA3 synapse. Is integral component of presynaptic membrane. Orthologous to human SYT7 (synaptotagmin 7). [provided by Alliance of Genome Resources, Apr 2022]