Probably part of an ABC transporter complex that could be involved in peptide import. Probably responsible for the translocation of the substrate across the membrane (By similarity). The complex is composed of two ATP-binding proteins (BMEII0863 and BMEII0864), two transmembrane proteins (BMEII0860 and BMEII0861) and a solute-binding protein (BMEII0859). Belongs to the binding-protein-dependent transport system permease family.