Part of the ABC transporter complex ModABC involved in molybdenum import. Responsible for energy coupling to the transport system. ATP + H2O + molybdate(out) = ADP + H(+) + molybdate(in) + phosphate The complex is composed of two ATP-binding proteins (ModC), two transmembrane proteins (ModB) and a solute-binding protein (ModA). Belongs to the ABC transporter superfamily. Molybdate importer (TC 3.A.1.8) family.