Involved in PTS1- and PTS2-dependent protein import into peroxisomes. May form heteromeric AAA ATPase complexes required for the import of proteins. Forms a AAA ATPase complex in the cytoplasm with PEX6. Localizes to the peroxisome when interacting with the PEX6/APEM9 complex. Mainly expressed in meristems and young developing leaves. Expressed in seedlings, roots, leaves, flowers, siliques and stems. Not detected in root tips. Highly expressed during the first two days post-germinative growth. Strongly up-regulated in senescence. By wounding and avirulent pathogen infection. Systemic induction by hydrogen peroxide. Belongs to the AAA ATPase family.