Enables metal ion binding activity; phosphatase inhibitor activity; and protein homodimerization activity. Acts upstream of or within male gonad development and megakaryocyte differentiation. Located in several cellular components, including lamellipodium; nucleus; and ruffle. Is expressed in several structures, including adrenal gland; brain; gonad; metanephros; and sensory organ. Orthologous to human TESC (tescalcin). [provided by Alliance of Genome Resources, Apr 2022]