Enables calcium ion binding activity. Predicted to be involved in several processes, including negative regulation of appetite; negative regulation of cell communication; and positive regulation of testosterone secretion. Predicted to act upstream of or within cellular calcium ion homeostasis. Located in endoplasmic reticulum and nuclear outer membrane. Is expressed in several structures, including extraembryonic component and female reproductive system. Orthologous to human NUCB2 (nucleobindin 2). [provided by Alliance of Genome Resources, Apr 2022]