Recombinant Human Inositol polyphosphate multikinase (IPMK)

Uniprot Id

Q8NFU5

Target Species

Human

Target Name

IPMK

Target Full Name

Inositol polyphosphate multikinase

Target Function

Inositol phosphate kinase with a broad substrate specificity. Phosphorylates inositol 1,4,5-trisphosphate (Ins(1,4,5)P3) first to inositol 1,3,4,5-tetrakisphosphate and then to inositol 1,3,4,5,6-pentakisphosphate (Ins(1,3,4,5,6)P5). Phosphorylates inositol 1,3,4,6-tetrakisphosphate (Ins(1,3,4,6)P4). Phosphorylates glycero-3-phospho-1D-myo-inositol 4,5-bisphosphate to glycero-3-phospho-1D-myo-inositol 3,4,5-trisphosphate. Plays an important role in MLKL-mediated necroptosis via its role in the biosynthesis of inositol pentakisphosphate (InsP5) and inositol hexakisphosphate (InsP6). Binding of these highly phosphorylated inositol phosphates to MLKL mediates the release of an N-terminal auto-inhibitory region, leading to activation of the kinase. Essential for activated phospho-MLKL to oligomerize and localize to the cell membrane during necroptosis. Required for normal embryonic development, probably via its role in the biosynthesis of inositol 1,3,4,5,6-pentakisphosphate (Ins(1,3,4,5,6)P5) and inositol hexakisphosphate (InsP6).

Target Subcellular Location

Nucleus.

Target Protein Families

Inositol phosphokinase (IPK) family

Target Tissue Specificity

Ubiquitous, with the highest expression in skeletal muscle, liver, placenta, lung, peripheral blood leukocytes, kidney, spleen and colon.

Target Synonyms

3; 4; 6-tetrakisphosphate 5-kinase; Inositol 1; Inositol 1,3,4,6 tetrakisphosphate 5 kinase; Inositol polyphosphate multikinase; Ipmk; IPMK_HUMAN