Part of the ABC transporter complex involved in sulfate/thiosulfate import. Responsible for energy coupling to the transport system. ATP + H2O + sulfate(out) = ADP + H(+) + phosphate + sulfate(in) ATP + H2O + thiosulfate(out) = ADP + H(+) + phosphate + thiosulfate(in) Belongs to the ABC transporter superfamily. Sulfate/tungstate importer (TC 3.A.1.6) family.