IMPA2: Proteins and Enzymes

IMPA2, also known as Inositol monophosphatase 2, has a 288 amino acid isoform that is 31 kDa and a short 261 amino acid that is 29 kDa, catalyzes the dephosphoylration of inositol monophosphate and plays an important role in phosphatidylinositol signaling, can use myo-inositol monophosphates, scylloinositol 1,4-diphosphate, glucose-1-phosphate, beta-glycerophosphate, and 2'-AMP as substrates, and serves as possible pharmacological target for lithium Li+ action in brain. Studies are being performed on the relationship of this protein to bipolar disorder, mood disorder, seizures, schizophrenia, febrile seizures, bipolar affective disorder, neisseria meningitides, pneumonia, tuberculosis, neuronitis, schizophrenia and leukemia. The protein has been shown to interact with HERPUD1, TNFRSF1H, INPP1, ISYNA1, and PLCG1 in inositol phosphate metabolism, metabolic pathways and phosphatidylinositol signaling system pathways.