ABC-type transporter; part of the gene cluster that mediates the biosynthesis of the isoquinoline alkaloids fumisoquin A, fumisoquin B and fumisoquin C; as well as small amounts of fumipyrrole as a shunt metabolite (PubMed:25582336, PubMed:27065235). The products of the cluster lead to a brown coloration and are important for growth and conidiation (PubMed:25582336). FsqE possibly plays a role of self-protection (Probable). Secondary metabolite biosynthesis. Expression is positively regulated by the fumisoquins biosynthesis specific transcription factor fsqA (PubMed:25582336). Belongs to the ABC transporter superfamily. ABCB family. Multidrug resistance exporter (TC 3.A.1.201) subfamily.