Synaptotagmin-like protein 2 (SYTL2)

Isoform 1 acts as a RAB27A effector protein and plays a role in cytotoxic granule exocytosis in lymphocytes. It's necessary for cytotoxic granule docking at the immunologic synapse.

Isoform 4 binds phosphatidylserine (PS) and phosphatidylinositol- 4,5-bisphosphate (PIP2) and promotes the recruitment of glucagon- containing granules to the cell membrane in pancreatic alpha cells. Binding to PS is inhibited by Ca(2+) while binding to PIP2 is Ca(2+) insensitive.