Part of the ABC transporter complex YxdLM which could be involved in peptide resistance. Responsible for energy coupling to the transport system (Probable). The complex is composed of two ATP-binding proteins (YxdL) and two transmembrane proteins (YxdM). Transcriptionally regulated by YxdJ. Induced by the antibacterial protein LL-37, probably via YxdJ. Belongs to the ABC transporter superfamily.