Involved in peroxisome biosynthesis. Required for stability of the PTS1 receptor. Probably required for protein import into peroxisomes. Anchored by PEX26 to peroxisome membranes, possibly to form heteromeric AAA ATPase complexes required for the import of proteins into peroxisomes (By similarity). Interacts directly with PEX26 and PEX1. Mediates the indirect interaction between PEX1 and PEX26. Interacts with ZFAND6 (By similarity). Associated with peroxisomal membranes (By similarity). Localized at the base of the outer segment of photoreceptor cells (PubMed:26593283). In the teeth, expressed in ameloblasts and odontoblasts (PubMed:26593283). Expressed in the retina, at higher levels in the ganglion cell layer and photoreceptor layer at the joint between the outer and inner segments (PubMed:26593283, PubMed:27302843). Belongs to the AAA ATPase family.