Mediates copper transfer across the plastid envelope. Required for the delivery of copper into the plastid stroma, which is essential for the function of copper proteins. Seems to be selective for monovalent copper Cu(+) transport. Also plays a role in glucose signaling-mediated cell proliferation of root meristem in non-green tissues. ATP + Cu(+)(in) + H2O = ADP + Cu(+)(out) + H(+) + phosphate Expressed in the shoots and roots. High-chlorophyll-fluorescence phenotype. Short roots. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IB subfamily.