The distal motor neuropathy mutation ATP7AP1386S, an ATP7A C-terminus-truncation (ATP7AΔ1415-1500) and a di-leucine ATP7A mutation (L1477L1478/AA) diminish physical interaction with AP-2. HEK293T cells were transfected with wild-type ATP7A-Venus, ATP7ALL/AA-Venus, ATP7AP1386S-Venus, or ATP7AΔ1415-1500-Venus. Transfected cells were immunoprecipitated (IP) by an AP-2 alpha subunit antibody and pull-down products detected by anti-GFP (Venus) antibody. (A and B) ATP7AWT consistently immunoprecipitated AP-2, with interaction markedly impaired by the different mutations. (C) Densitometric summary of AP-2 IP blots (N = 10 for ATP7AWT, N = 4 for ATP7ALL/AA, N = 6 for ATP7AP1386S and N = 3 for ATP7AΔ1415-1500). Error bars = SD.