May function in the export of copper from the cytoplasm to an intracellular organelle. It may serve as well for the export of other metals. ATP + Cu(+)(in) + H2O = ADP + Cu(+)(out) + H(+) + phosphate Monomer. Interacts with PDZD11 (By similarity). Interacts with ATOX1 and COMMD1 (By similarity). Interacts with TYRP1 (By similarity). Directly interacts with SOD3; this interaction is copper-dependent and is required for SOD3 activity (By similarity). Cycles constitutively between the trans-Golgi network (TGN) and the plasma membrane. Predominantly found in the TGN and relocalized to the plasma membrane in response to elevated copper levels. Expressed in most tissues except liver. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Heavy metal - Issue 79 of February 2007