May be involved in the trafficking and exocytosis of secretory vesicles in non-neuronal tissues. Is Ca(2+)-independent. Homodimer. Can also form heterodimers (By similarity). Localized in perinuclear and submembranous regions. Highly expressed in fetal and adult brain tissue. The disease is caused by variants affecting the gene represented in this entry. Belongs to the synaptotagmin family.