Part of the ABC transporter complex XacGHIJK involved in the uptake of xylose and arabinose (PubMed:31089701). Responsible for energy coupling to the transport system (Probable). ATP + D-xylose(out) + H2O = ADP + D-xylose(in) + H(+) + phosphate ATP + H2O + L-arabinose(out) = ADP + H(+) + L-arabinose(in) + phosphate The complex is composed of two ATP-binding proteins (XacJ and XacK), two transmembrane proteins (XacH and XacI) and a solute-binding protein (XacG). Transcriptionally up-regulated by both L-arabinose and D-xylose via the pentose-specific regulator XacR. Belongs to the ABC transporter superfamily. Carbohydrate uptake transporter-1 (CUT1) (TC 3.A.1.1) family.