Rabbit anti-Human PIP4K2A Polyclonal Antibody

Uniprot Id

P48426

Target Species

Human

Target Name

PIP4K2A

Target Full Name

Phosphatidylinositol 5-phosphate 4-kinase type-2 alpha

Target 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). Has both ATP- and GTP-dependent kinase activities. 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. Required for lysosome-peroxisome membrane contacts and intracellular cholesterol transport through modulating peroxisomal PtdIns(4,5)P2 level. In collaboration with PIP4K2B, has a role in mediating autophagy in times of nutrient stress. Required for autophagosome-lysosome fusion and the regulation of cellular lipid metabolism. May be involved in thrombopoiesis, and the terminal maturation of megakaryocytes and regulation of their size. Negatively regulates insulin signaling through a catalytic-independent mechanism. PIP4Ks interact with PIP5Ks and suppress PIP5K-mediated PtdIns(4,5)P2 synthesis and insulin-dependent conversion to PtdIns(3,4,5)P3.

Target Subcellular Location

Cell membrane. Nucleus. Lysosome. Cytoplasm. Photoreceptor inner segment. Cell projection, cilium, photoreceptor outer segment.

Target Tissue Specificity

Expressed ubiquitously, with high levels in the brain. Present in most tissues, except notably skeletal muscle and small intestine.

Target Synonyms

1 phosphatidylinositol 4 phosphate 5 kinase 2 alpha ; 1 phosphatidylinositol 4 phosphate 5 kinase; 1 phosphatidylinositol 4 phosphate kinase; 1-phosphatidylinositol-5-phosphate 4-kinase 2-alpha; 4 5 kinase B isoform; 4 5 kinase C isoform; 4 5 kinase isoform 2 alpha; Diphosphoinositide kinase 2 alpha; Diphosphoinositide kinase 2-alpha; FLJ13267; Phosphatidylinositol 4 phosphate 5 kinase type 2 alpha; Phosphatidylinositol 4 phosphate 5 kinase type II alpha; Phosphatidylinositol-5-phosphate 4-kinase type II alpha; Phosphatidylinositol-5-phosphate 4-kinase type-2 alpha; PI(5)P 4-kinase type II alpha; PI42A_HUMAN; PI5P4KA; PIP4K2A; PIP4KII-alpha; PIP5K2 ; PIP5K2 alpha; PIP5K2A; PIP5KII alpha; PIP5KII-alpha; PIP5KIIA; PIP5KIII; PIPK ; PtdIns ; PtdIns(4)P-5-kinase B isoform; PtdIns(4)P-5-kinase C isoform; PtdIns(5)P-4-kinase isoform 2-alpha; Type II phosphatidylinositol 4 phosphate 5 kinase 53 K isoform

Target Background

Phosphatidylinositol-5, 4-bisphosphate, the precursor to second messengers of the phosphoinositide signal transduction pathways, is thought to be involved in the regulation of secretion, cell proliferation, differentiation, and motility. The protein encoded by this gene is one of a family of enzymes capable of catalyzing the phosphorylation of phosphatidylinositol-5-phosphate on the fourth hydroxyl of the myo-inositol ring to form phosphatidylinositol-5, 4-bisphosphate. The amino acid sequence of this enzyme does not show homology to other kinases, but the recombinant protein does exhibit kinase activity. This gene is a member of the phosphatidylinositol-5-phosphate 4-kinase family.