PTEN Blocking Peptide

This gene was identified as a tumor suppressor that is mutated in a large number of cancers at high frequency. The protein encoded this gene is a phosphatidylinositol-3,4,5-trisphosphate 3-phosphatase. It contains a tensin like domain as well as a catalytic domain similar to that of the dual specificity protein tyrosine phosphatases. Unlike most of the protein tyrosine phosphatases, this protein preferentially dephosphorylates phosphoinositide substrates. It negatively regulates intracellular levels of phosphatidylinositol-3,4,5-trisphosphate in cells and functions as a tumor suppressor by negatively regulating AKT/PKB signaling pathway. [provided by RefSeq, Jul 2008]

PTEN: a phosphoinositide 3-phosphatase (PIP3) and a tumor suppressor implicated in a wide variety of human cancers. Dephosphorylates inositol phospholipids generated by the activation of the phosphoinositide 3 kinase (PI3K). A major negative regulator of the PI3K/Akt signaling pathway. Possesses a C-terminal regulatory domain that contains three phosphorylation sites which may regulate its stability.

Protein type: Carbohydrate Metabolism - inositol phosphate; EC 3.1.3.48; Phosphatase, lipid; Nuclear receptor co-regulator; Motility/polarity/chemotaxis; EC 3.1.3.16; EC 3.1.3.67; Tumor suppressor

Chromosomal Location of Human Ortholog: 10q23.3

Cellular Component: nucleoplasm; postsynaptic membrane; PML body; internal side of plasma membrane; neuron projection; cell projection; mitochondrion; cytoplasm; plasma membrane; extracellular region; dendritic spine; cytosol; nucleus

Molecular Function: phosphatidylinositol-3-phosphatase activity; phosphatidylinositol-3,4,5-trisphosphate 3-phosphatase activity; inositol-1,3,4,5-tetrakisphosphate 3-phosphatase activity; platelet-derived growth factor receptor binding; magnesium ion binding; protein tyrosine phosphatase activity; protein serine/threonine phosphatase activity; protein kinase binding; PDZ domain binding; protein binding; enzyme binding; phosphatidylinositol-3,4-bisphosphate 3-phosphatase activity; protein tyrosine/serine/threonine phosphatase activity; phosphoprotein phosphatase activity; lipid binding

Biological Process: central nervous system development; male mating behavior; nerve growth factor receptor signaling pathway; prepulse inhibition; response to arsenic; regulation of cellular component size; heart development; anaphase-promoting complex activation during mitotic cell cycle; Wnt receptor signaling pathway through beta-catenin; T cell receptor signaling pathway; regulation of B cell apoptosis; myelin maintenance in the central nervous system; response to glucose stimulus; negative regulation of axonogenesis; response to drug; rhythmic synaptic transmission; fibroblast growth factor receptor signaling pathway; dentate gyrus development; negative regulation of myelination; social behavior; forebrain morphogenesis; negative regulation of organ growth; response to ethanol; response to zinc ion; inositol phosphate dephosphorylation; phosphatidylinositol biosynthetic process; endothelial cell migration; positive regulation of transcription factor activity; multicellular organismal response to stress; negative regulation of apoptosis; negative regulation of phagocytosis; synapse maturation; inositol phosphate metabolic process; apoptosis; regulation of protein stability; locomotory behavior; negative regulation of cell size; platelet-derived growth factor receptor signaling pathway; protein amino acid dephosphorylation; regulation of myeloid cell apoptosis; response to estradiol stimulus; negative regulation of cell proliferation; locomotor rhythm; learning and/or memory; synaptogenesis; negative regulation of protein amino acid phosphorylation; phospholipid metabolic process; positive regulation of cell proliferation; brain morphogenesis; protein kinase B signaling cascade; nerve-nerve synaptic transmission; angiogenesis; negative regulation of cell migration; response to nutrient; negative regulation of epithelial cell proliferation; aging; cardiac muscle development; epidermal growth factor receptor signaling pathway; cell migration; phosphoinositide-mediated signaling; negative regulation of protein kinase B signaling cascade; protein stabilization; central nervous system neuron axonogenesis; maternal behavior; negative regulation of focal adhesion formation; response to ATP; memory; cell proliferation; G1/S-specific negative regulation of cyclin-dependent protein kinase activity; innate immune response; phosphoinositide dephosphorylation; regulation of cyclin-dependent protein kinase activity; negative regulation of phosphoinositide 3-kinase cascade

Disease: Meningioma, Familial, Susceptibility To; Thyroid Carcinoma, Follicular; Melanoma, Cutaneous Malignant, Susceptibility To, 1; Bannayan-riley-ruvalcaba Syndrome; Cowden Syndrome 1; Squamous Cell Carcinoma, Head And Neck; Prostate Cancer; Glioma Susceptibility 2; Vacterl Association With Hydrocephalus; Endometrial Cancer; Macrocephaly/autism Syndrome