Any feedback?
Please rate this page
(literature.php)
(0/150)

BRENDA support

Literature summary extracted from

  • Xu, R.; Snyder, S.
    Gene transcription by p53 requires inositol polyphosphate multikinase as a co-activator (2013), Cell Cycle, 12, 1819-1820.
    View publication on PubMedView publication on EuropePMC

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
2.7.1.151 Mg2+ required Homo sapiens

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2.7.1.151 ATP + 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate Homo sapiens
-
 ADP + 1-phosphatidyl-1D-myo-inositol 3,4,5-trisphosphate
-
 ?
2.7.1.151 ATP + 1D-myo-inositol 1,4,5,6-tetrakisphosphate Homo sapiens
-
 ADP + 1D-myo-inositol 1,3,4,5,6-pentakisphosphate
-
 ?
2.7.1.151 ATP + 1D-myo-inositol 1,4,5-trisphosphate Homo sapiens
-
 ADP + 1D-myo-inositol 1,3,4,5-tetrakisphosphate
-
 ?
2.7.1.151 ATP + 1D-myo-inositol 1,4,5-trisphosphate Homo sapiens
-
 ADP + 1D-myo-inositol 1,4,5,6-tetrakisphosphate
-
 ?
2.7.1.151 additional information Homo sapiens inositol polyphosphate multikinase is a multifunctional enzyme with PI3-kinase, IP3-kinase and catalytically independent activities. IPMK is a PI3-kinase which phosphorylates PIP2 into PIP3, serving as a physiologic activator of Akt/PKB. It also possesses IP3-kinase activity, converting IP3 into IP4 (1,3,4,5) or IP4 (1,4,5,6). Whether the phosphorylation of IP3 at the 3-position or the 6-position is physiologically regulated ?
-
 ?

Organism

EC Number Organism UniProt Comment Textmining
2.7.1.151 Homo sapiens
-
-
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.7.1.151 ATP + 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate
-
 Homo sapiens ADP + 1-phosphatidyl-1D-myo-inositol 3,4,5-trisphosphate
-
 ?
2.7.1.151 ATP + 1D-myo-inositol 1,4,5,6-tetrakisphosphate
-
 Homo sapiens ADP + 1D-myo-inositol 1,3,4,5,6-pentakisphosphate
-
 ?
2.7.1.151 ATP + 1D-myo-inositol 1,4,5-trisphosphate
-
 Homo sapiens ADP + 1D-myo-inositol 1,3,4,5-tetrakisphosphate
-
 ?
2.7.1.151 ATP + 1D-myo-inositol 1,4,5-trisphosphate
-
 Homo sapiens ADP + 1D-myo-inositol 1,4,5,6-tetrakisphosphate
-
 ?
2.7.1.151 additional information inositol polyphosphate multikinase is a multifunctional enzyme with PI3-kinase, IP3-kinase and catalytically independent activities. IPMK is a PI3-kinase which phosphorylates PIP2 into PIP3, serving as a physiologic activator of Akt/PKB. It also possesses IP3-kinase activity, converting IP3 into IP4 (1,3,4,5) or IP4 (1,4,5,6). Whether the phosphorylation of IP3 at the 3-position or the 6-position is physiologically regulated Homo sapiens ?
-
 ?

Synonyms

EC Number Synonyms Comment Organism
2.7.1.151 inositol polyphosphate multikinase
-
 Homo sapiens
2.7.1.151 IPMK
-
 Homo sapiens

Cofactor

EC Number Cofactor Comment Organism Structure
2.7.1.151 ATP
-
 Homo sapiens

General Information

EC Number General Information Comment Organism
2.7.1.151 physiological function IPMK is a pleiotropic enzyme. Gene transcription by p53 requires inositol polyphosphate multikinase as a co-activator. IPMK subsequently phosphorylates IP4 into IP5, and is the rate-limiting enzyme for this metabolite. IPMK serves as the gate-keeping enzyme for the synthesis of all higher inositol polyphosphate species, including inositol diphosphates, which are implicated in diverse physiologic processes. Independent of catalytic activity, IPMK binds to p53 and enhances its association with p300. The enhancement of p300s histone acetyltransferase activity by IPMK leads to increased acetylation of p53 and histone H3, as well as p53 association to target promoters. This augmentation of p53-dependent gene transcription enhances cell death. IPMK is also a major PI3 kinase, which acts together with the wortmannin-sensitive p110/p85 PI3 kinase, EC 2.7.1.153, to generatephosphatidylinositol-3,4,5-trisphosphate that activates Akt and protein synthesis. Both wild-type and catalytically inactive IPMK stabilize the mTOR-1 complex to facilitate protein translation Homo sapiens