FUNCTION: Inositol phosphate kinase with a broad substrate specificity (PubMed:12027805, PubMed:12223481, PubMed:28882892, PubMed:30420721, PubMed:30624931). 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-pentakis...
FUNCTION: Inositol phosphate kinase with a broad substrate specificity (PubMed:12027805, PubMed:12223481, PubMed:28882892, PubMed:30420721, PubMed:30624931). 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) (PubMed:12027805, PubMed:12223481, PubMed:28882892, PubMed:30624931). Phosphorylates inositol 1,3,4,6-tetrakisphosphate (Ins(1,3,4,6)P4) (PubMed:12223481). Phosphorylates glycero-3-phospho-1D-myo-inositol 4,5-bisphosphate to glycero-3-phospho-1D-myo-inositol 3,4,5-trisphosphate (PubMed:30420721, PubMed:28882892). 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 (PubMed:29883610). 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) (By similarity). {ECO:0000250|UniProtKB:Q7TT16, ECO:0000269|PubMed:12027805, ECO:0000269|PubMed:12223481, ECO:0000269|PubMed:28882892, ECO:0000269|PubMed:29883610, ECO:0000269|PubMed:30420721, ECO:0000269|PubMed:30624931}.
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GO - Biological processes (BP):
inositol phosphate biosynthetic process [GO:0032958]; inositol phosphate metabolic process [GO:0043647]; inositol trisphosphate metabolic process [GO:0032957]; necroptotic process [GO:0070266]...
inositol phosphate biosynthetic process [GO:0032958]; inositol phosphate metabolic process [GO:0043647]; inositol trisphosphate metabolic process [GO:0032957]; necroptotic process [GO:0070266]
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GO - Molecular function (MF):
ATP binding [GO:0005524]; flavonoid binding [GO:0097243]; inositol-1,4,5-trisphosphate 3-kinase activity [GO:0008440]; inositol-1,4,5-trisphosphate 6-kinase activity [GO:0000823]; inositol tetrakisphosphate 3-kinase activity [GO:0000824]; inositol tetrakisphosphate 5-kinase activity [GO:0047326]; in...
ATP binding [GO:0005524]; flavonoid binding [GO:0097243]; inositol-1,4,5-trisphosphate 3-kinase activity [GO:0008440]; inositol-1,4,5-trisphosphate 6-kinase activity [GO:0000823]; inositol tetrakisphosphate 3-kinase activity [GO:0000824]; inositol tetrakisphosphate 5-kinase activity [GO:0047326]; inositol tetrakisphosphate 6-kinase activity [GO:0000825]; inositol tetrakisphosphate kinase activity [GO:0051765]; kinase activity [GO:0016301]; metal ion binding [GO:0046872]; myo-inositol-1,2,3,4,6-heptakisphosphate 5-kinase activity [GO:0102732]; phosphatidylinositol-3,4-bisphosphate 5-kinase activity [GO:0052812]; phosphatidylinositol-4,5-bisphosphate 3-kinase activity [GO:0046934]
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GO - Cellular component (CC):
cytoplasm [GO:0005737]; nucleoplasm [GO:0005654]; nucleus [GO:0005634]...
cytoplasm [GO:0005737]; nucleoplasm [GO:0005654]; nucleus [GO:0005634]
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