Has an important function as a repair enzyme for proteins that have been inactivated by oxidation. Catalyzes the reversible oxidation-reduction of methionine sulfoxide in proteins to methionine.
Subcellular locations: Mitochondrion
Subcellular locations: Cytoplasm
Subcellular locations: Cytoplasm, Nucleus
Subcellular locations: Cytoplasm, Membrane
Ubiquitous. Highest expression in adult kidney and cerebellum, followed by liver, heart ventricles, bone marrow and hippocampus.