PIK3CA — Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha
PIK3CA belongs to a gene co-expression module in 1 of 28 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
PIK3CA's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| CD4⁺ T cells | T cell Coinhibition Immune regulation | BTLA, CASD1, CFAP36, DUSP14, FCHSD2, HIVEP2, IFNGR2, KLF7 +7 more | View in SCUBA |
About the gene
| Synonyms | PI3K |
|---|---|
| Chromosome | 3: 179148114-179240093 |
| Predicted location | Intracellular |
| Essential gene | Yes |
| Protein class | Cancer-related genes, Disease related genes, Enzymes, Essential proteins, FDA approved drug targets, Human disease related genes, Metabolic proteins, Predicted intracellular proteins, RAS pathway related proteins |
| Molecular function | Kinase, Serine/threonine-protein kinase, Transferase |
| Biological process | Angiogenesis, Lipid metabolism, Phagocytosis |
Function
Phosphoinositide-3-kinase (PI3K) phosphorylates phosphatidylinositol (PI) and its phosphorylated derivatives at position 3 of the inositol ring to produce 3-phosphoinositides. Uses ATP and PtdIns(4,5)P2 (phosphatidylinositol 4,5-bisphosphate) to generate phosphatidylinositol 3,4,5-trisphosphate (PIP3). PIP3 plays a key role by recruiting PH domain- containing proteins to the membrane, including AKT1 and PDPK1, activating signaling cascades involved in cell growth, survival, proliferation, motility and morphology. Participates in cellular signaling in response to various growth factors. Involved in the activation of AKT1 upon stimulation by receptor tyrosine kinases ligands such as EGF, insulin, IGF1, VEGFA and PDGF. Involved in signaling via insulin-receptor substrate (IRS) proteins. Essential in endothelial cell migration during vascular development through VEGFA signaling, possibly by regulating RhoA activity. Required for lymphatic vasculature development, possibly by binding to RAS and by activation by EGF and FGF2, but not by PDGF. Regulates invadopodia formation through the PDPK1-AKT1 pathway. Participates in cardiomyogenesis in embryonic stem cells through a AKT1 pathway. Participates in vasculogenesis in embryonic stem cells through PDK1 and protein kinase C pathway. In addition to its lipid kinase activity, it displays a serine-protein kinase activity that results in the autophosphorylation of the p85alpha regulatory subunit as well as phosphorylation of other proteins such as 4EBP1, H-Ras, the IL-3 beta c receptor and possibly others. Plays a role in the positive regulation of phagocytosis and pinocytosis (By similarity).
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.