Part of the ABC transporter complex XylFGH involved in xylose import. Responsible for energy coupling to the transport system. ATP + D-xylose(out) + H2O = ADP + D-xylose(in) + H(+) + phosphate The complex is composed of two ATP-binding proteins (XylG), two transmembrane proteins (XylH) and a solute-binding protein (XylF). Belongs to the ABC transporter superfamily. Xylose importer (TC 3.A.1.2.4) family.