Involved in the uptake and/or transport of polyamines, probably through ATP hydrolysis. This contributes to the maintenance of intracellular polyamine levels. Polyamines are essential for cell proliferation and are implicated in cellular processes, ranging from DNA replication to apoptosis. ATP + H2O = ADP + H(+) + phosphate Expressed in the 20 intestinal cells and in the excretory cell. Not expressed in embryos, but expressed at all larval stages of development and in adults. Disrupts the polyamine uptake and/or transport of the polyamine conjugate Ant-4,4 and norspermidine, a toxic structural analog of the polyamine spermidine. Intracellular levels of the natural polyamines spermidine and putrescine are as wild-type. Double knockout with either odc-1 or smd-1 (two enzymes involved in polyamine synthesis) results in a reduced brood size, delayed postembryonic development and reduced intracellular levels of spermidine. Double knockout with odc-1 results in reduced levels of the polyamine putrescine, while double knockout with smd-1 results in increased accumulation of putrescine. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type V subfamily.