MFS-type transporter; part of the gene cluster that mediates the biosynthesis of peramine, a pyrrolopyrazine synthesized in association with the grass host that protects the plant from insect herbivory (PubMed:16091042). Probably involved in peramine transport (PubMed:16091042). Expression is down-regulated when the stress-activated mitogen-activated protein kinase (sakA) is deleted (PubMed:20519633). Belongs to the major facilitator superfamily.