Mediates copper transfer across the chloroplast thylakoid membrane. Required for copper delivery into the thylakoids lumen, which is essential for the function of copper proteins. ATP + Cu(2+)(in) + H2O = ADP + Cu(2+)(out) + H(+) + phosphate A number of isoforms are produced. According to EST sequences. Expressed in the shoots only and not in the roots. High-chlorophyll-fluorescence phenotype. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IB subfamily.