Post Translational Modifications | Ubiquitinated by the SPOP/CUL3 complex. Ubiquitination is stimulated by PtdIns5P levels. Phosphorylated on serine residues. |
Function | Participates in the biosynthesis of phosphatidylinositol 4,5-bisphosphate. Preferentially utilizes GTP, rather than ATP, for PI(5)P phosphorylation and its activity reflects changes in direct proportion to the physiological GTP concentration. Its GTP-sensing activity is critical for metabolic adaptation. PIP4Ks negatively regulate insulin signaling through a catalytic-independent mechanism. They interact with PIP5Ks and suppress PIP5K-mediated PtdIns(4,5)P2 synthesis and insulin-dependent conversion to PtdIns(3,4,5)P3. |
Protein Name | Phosphatidylinositol 5-Phosphate 4-Kinase Type-2 Beta1-Phosphatidylinositol 5-Phosphate 4-Kinase 2-BetaDiphosphoinositide Kinase 2-BetaPhosphatidylinositol 5-Phosphate 4-Kinase Type Ii BetaPi(5p 4-Kinase Type Ii BetaPip4kii-BetaPtdins(5p-4-Kinase Isoform 2-Beta |
Database Links | Reactome: R-HSA-1660499Reactome: R-HSA-6811555Reactome: R-HSA-6811558Reactome: R-HSA-8847453 |
Cellular Localisation | Endoplasmic Reticulum MembranePeripheral Membrane ProteinCell MembraneNucleusCytoplasmAssociated With The Plasma Membrane And The Endoplasmic Reticulum |
Alternative Protein Names | Phosphatidylinositol 5-Phosphate 4-Kinase Type-2 Beta protein1-Phosphatidylinositol 5-Phosphate 4-Kinase 2-Beta proteinDiphosphoinositide Kinase 2-Beta proteinPhosphatidylinositol 5-Phosphate 4-Kinase Type Ii Beta proteinPi(5p 4-Kinase Type Ii Beta proteinPip4kii-Beta proteinPtdins(5p-4-Kinase Isoform 2-Beta proteinPIP4K2B proteinPIP5K2B protein |
Information sourced from Uniprot.org