Molecular function

Catalysis of the reaction: P(1),P(4)-bis(5'-adenosyl) tetraphosphate + H2O = 2 ADP + 2 H+.

1-P,4-P-bis(5'-nucleosyl)-tetraphosphate nucleosidebisphosphohydrolase activity, P1,P4-bis(5'-nucleosyl)-tetraphosphate nucleosidebisphosphohydrolase activity, adenosine tetraphosphate phosphodiesterase activity, bis(5'-adenosyl) tetraphosphatase activity, diadenosine 5',5'''-P(1),P(4)-tetraphosphate pyrophosphohydrolase activity, diadenosine 5',5'''-P1,P4-tetraphosphatase activity, diadenosine 5',5'''-P1,P4-tetraphosphate pyrophosphohydrolase activity, diadenosine polyphosphate hydrolase activity, diadenosine tetraphosphate hydrolase activity, diadenosinetetraphosphatase (symmetrical) activity, dinucleosidetetraphosphatase (symmetrical) activity, dinucleosidetetraphosphate (symmetrical), symmetrical diadenosine tetraphosphate hydrolase activity