Putative copper transporter; part of the crm gene cluster that mediates the biosynthesis of a yet unidentified copper-responsive metabolite (PubMed:29844112). Probably involved in the transport of copper (Probable). Expressed in copper depleted conditions via the regulation of the macA transcription factor. Does not affect the xanthocillin production. Belongs to the copper transporter (Ctr) (TC 1.A.56) family. SLC31A subfamily.