Predicted to enable calcium ion binding activity and phospholipid binding activity. Predicted to be involved in endoplasmic reticulum-plasma membrane tethering. Predicted to act upstream of or within lipid transport. Predicted to be located in endoplasmic reticulum-plasma membrane contact site. Predicted to be integral component of plasma membrane. Predicted to be extrinsic component of cytoplasmic side of plasma membrane and intrinsic component of endoplasmic reticulum membrane. Is expressed in several structures, including alimentary system; embryo ectoderm; genitourinary system; lymph node; and nervous system. Orthologous to human ESYT3 (extended synaptotagmin 3). [provided by Alliance of Genome Resources, Apr 2022]