Vacuolar protein with a possible role in sequestering heavy metals; involved in the oxidative stress response and modulation of replicative lifespan; undergoes autophosphorylation, which is abolished by mutation of Asp781 in the catalytic motif (D781N); P5 ATPase subfamily member with similarity to yeast Spf1p and homology of human ATP13A2 (PARK9), mutations in which are associated with Parkinson disease and Kufor-Rakeb syndrome