Required for stability of PEX5 and protein import into the peroxisome matrix. 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 PEX6. Interacts indirectly with PEX26, via its interaction with PEX6 (By similarity). Associated with peroxisomal membranes. The N-terminal domain shows evolutionary conservation with that of VCP, and is able to bind phospholipids with a preference for phosphatidylinositol monophosphates. Belongs to the AAA ATPase family.