Enables isocitrate dehydrogenase (NADP+) activity. Involved in several processes, including NADP biosynthetic process; negative regulation of glial cell proliferation; and negative regulation of matrix metallopeptidase secretion. Predicted to be located in cytosol and peroxisome. Predicted to be active in mitochondrion. Used to study status epilepticus. Human ortholog(s) of this gene implicated in D-2-hydroxyglutaric aciduria 2; acute myeloid leukemia; carcinoma (multiple); and lung cancer (multiple). Orthologous to human IDH2 (isocitrate dehydrogenase (NADP(+)) 2). [provided by Alliance of Genome Resources, Apr 2022]