ATP-driven pump involved in endocytosis-dependent polyamine transport. Uses ATP as an energy source to transfer polyamine precursor putrescine from the endosomal compartment to the cytosol. ATP + H2O + putrescine(out) = ADP + H(+) + phosphate + putrescine(in) Mainly targeted to the recycling endosomes and to a lesser extent to the early and late endosomes. Broadly expressed. Up-regulated by polyamine biosynthesis inhibitor, difluoromethylornithine (DFMO). Dubious isoform produced through aberrant splice sites. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type V subfamily. Truncated N-terminus.