ATP13A2

ATPase which acts as a lysosomal polyamine exporter with high affinity for spermine. Also stimulates cellular uptake of polyamines and protects against polyamine toxicity. Plays a role in intracellular cation homeostasis and the maintenance of neuronal integrity. Contributes to cellular zinc homeostasis. Confers cellular protection against Mn(2+) and Zn(2+) toxicity and mitochondrial stress. Required for proper lysosomal and mitochondrial maintenance. Regulates the autophagy-lysosome pathway through the control of SYT11 expression at both transcriptional and post-translational levels. Facilitates recruitment of deacetylase HDAC6 to lysosomes to deacetylate CTTN, leading to actin polymerization, promotion of autophagosome-lysosome fusion and completion of autophagy. Promotes secretion of exosomes as well as secretion of SCNA via exosomes. Plays a role in lipid homeostasis..

Function from UniProtKB (Q9NQ11), read 2026-09-23. CC BY 4.0.