Probable cation-transporting ATPase 13A2 is an

enzyme Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...

that in humans is encoded by the ''ATP13A2''

gene In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a ba ...

that is involved in the transport of divalent transition metal cations. It appears to protect cells from

manganese Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy use ...

and zinc toxicity, possibly by causing cellular efflux and/or lysosomal sequestration; and from iron toxicity, possibly by preserving lysosome integrity against iron-induced lipid peroxidation. However, it potentiates the toxic effects of cadmium and nickel on developing neurites, and of the widely used herbicide

paraquat Paraquat (trivial name; ), or ''N'',''N''′-dimethyl-4,4′-bipyridinium dichloride (systematic name), also known as methyl viologen, is an organic compound with the chemical formula C6H7N)2l2. It is classified as a viologen, a family of redox ...

possibly by increasing

polyamine A polyamine is an organic compound having more than two amino groups. Alkyl polyamines occur naturally, but some are synthetic. Alkylpolyamines are colorless, hygroscopic, and water soluble. Near neutral pH, they exist as the ammonium derivatives. ...

uptake. Deficiency is associated with spastic paraplegia and Kufor-Rakeb syndrome, in which there is progressive parkinsonism with dementia.

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