Part of the ABC transporter complex XylFGH involved in the uptake of xylose and arabinose (PubMed:29150511). Responsible for the translocation of the substrate across the membrane (Probable). The complex is composed of two ATP-binding proteins (XylG), two transmembrane proteins (XylH) and a solute-binding protein (XylF). Up-regulated in the presence of D-xylose, L-arabinose and D-arabinose. Deletion of the gene results in a growth defect on D-xylose and L-arabinose. Belongs to the binding-protein-dependent transport system permease family.