In enzymology, a [isocitrate dehydrogenase (NADP+)] kinase (EC 2.7.11.5) is an enzyme that catalyzes the chemical reaction: ATP + [isocitrate dehydrogenase (NADP+)] ADP + [isocitrate dehydrogenase (NADP+)] phosphate Thus, the two substrates of this enzyme are ATP and isocitrate dehydrogenase (NADP+), whereas its two products are ADP and isocitrate dehydrogenase (NADP+) phosphate. This enzyme belongs to the family of transferases, specifically those transferring a phosphate group to the sidechain oxygen atom of serine or threonine residues in proteins (protein-serine/threonine kinases).