Enables P-type divalent copper transporter activity. Acts upstream of or within several processes, including cellular transition metal ion homeostasis; lactation; and protein maturation by copper ion transfer. Located in membrane and trans-Golgi network. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Used to study Wilson disease. Human ortholog(s) of this gene implicated in Wilson disease. Orthologous to human ATP7B (ATPase copper transporting beta). [provided by Alliance of Genome Resources, Apr 2022]