Part of the ABC transporter complex AlsBAC involved in D-allose import. Probably responsible for energy coupling to the transport system. ATP + D-allose(out) + H2O = ADP + D-allose(in) + H(+) + phosphate The complex is composed of two ATP-binding proteins (AlsA), two transmembrane proteins (AlsC) and a solute-binding protein (AlsB). Belongs to the ABC transporter superfamily. D-allose importer (TC 3.A.1.2.6) family.