Source: hRBCD ; ID: IPI00009688
Marked as 'Membrane associated protein'
Confidence: high (present in two of the MS resources) Search PubMed for
(RBC AND this entry)

Gene names: PIP4K2A , PIP5K2, PIP5K2A
Protein names and data: PI42A_HUMAN , Phosphatidylinositol 5-phosphate 4-kinase type-2 alpha; , 1-phosphatidylinositol 5-phosphate 4-kinase 2-alpha; Diphosphoinositide kinase 2-alpha; PIP5KIII; Phosphatidylinositol 5-phosphate 4-kinase type II alpha; PI(5)P 4-kinase type II alpha; PIP4KII-alpha; PtdIns(4)P-5-kinase B isoform; PtdIns(4)P-5-kinase C isoform; PtdIns(5)P-4-kinase isoform 2-alpha Lenght: 406 a.a.
Mass: 46225 Da
fasta formatted sequence

Function: Catalyzes the phosphorylation of phosphatidylinositol 5- phosphate (PtdIns5P) on the fourth hydroxyl of the myo-inositol ring, to form phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2). May exert its function by regulating the levels of PtdIns5P, which functions in the cytosol by increasing AKT activity and in the nucleus signals through ING2. May regulate the pool of cytosolic PtdIns5P in response to the activation of tyrosine phosphorylation. May negatively regulate insulin- stimulated glucose uptake by lowering the levels of PtdIns5P. May be involved in thrombopoiesis, and the terminal maturation of megakaryocytes and regulation of their size.
Catalytic activity: ATP + 1-phosphatidyl-1D-myo-inositol 5- phosphate = ADP + 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate.
Cellular location: Cell membrane (By similarity). Nucleus. Cytoplasm. Note=May translocate from the cytosol to the cell membrane upon activation of tyrosine phosphorylation. May translocate from the inner to the outer segments of the rod photoreceptor cells in response to light (By similarity). Localization to the nucleus is modulated by the interaction with PIP4K2B.
Tissue specificity: Expressed ubiquitously, with high levels in the brain. Present in most tissues, except notably skeletal muscle and small intestine.

Genetic variants

Database cross-references

UniProt: P48426
Ensembl: ENST00000376573
MIM: 603140
neXtProt: NX_P48426
Antibodypedia: P48426 (may not find the protein thus also not any antibody)
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