Part of the ABC transporter complex CntABCDF (Opp1) involved in the uptake of metal in complex with the metallophore staphylopine (StP). May be involved in the import of a large array of divalent metals ions such as nickel, cobalt, zinc, copper and iron. Probably responsible for the translocation of the substrate across the membrane. The complex is composed of two ATP-binding proteins (CntD and CntF), two transmembrane proteins (CntB and CntC) and a solute-binding protein (CntA). Up-regulated in metal-poor media. Deletion of the cntABCDF genes decreases StP intracellular levels and decreases the import of iron, zinc, nickel and cobalt. Belongs to the binding-protein-dependent transport system permease family.