Probably part of the ABC transporter complex Rv1217c-Rv1218c involved in the resistance to a wide range of structurally unrelated drugs (PubMed:23143285). Probably responsible for the translocation of the substrate across the membrane (Probable). The complex is probably composed of two ATP-binding proteins (Rv1218c) and a transmembrane protein (Rv1217c). Transcriptionally regulated by RaaS (Rv1219c) (PubMed:24424575). Expression increases in multidrug-resistant clinical strains (MDR-TB) compared to drug-susceptible strains (PubMed:23143285).