Enables protein tyrosine kinase activity and signaling receptor activity. Involved in several processes, including circulatory system development; negative regulation of endothelial cell apoptotic process; and response to retinoic acid. Acts upstream of or within several processes, including positive regulation of macromolecule metabolic process; positive regulation of protein import into nucleus; and regulation of NIK/NF-kappaB signaling. Located in perinuclear region of cytoplasm. Is expressed in several structures, including cardiovascular system; central nervous system; extraembryonic component; genitourinary system; and hemolymphoid system gland. Human ortholog(s) of this gene implicated in arteriovenous malformation and multiple cutaneous and mucosal venous malformations. Orthologous to human TEK (TEK receptor tyrosine kinase). [provided by Alliance of Genome Resources, Apr 2022]