PIK3R2
PIK3R2 (Phosphatidylinositol 3-kinase regulatory subunit beta) is a gene. The public catalogues list it as a drug target and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Melanoma.
Overview
Regulatory subunit of phosphoinositide-3-kinase (PI3K), a kinase that phosphorylates 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 signalling cascades involved in cell growth, survival, proliferation, motility and morphology. Binds to activated (phosphorylated) protein-tyrosine kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane.
CIViC holds 3 clinical evidence items and 0 assertions across 3 variants, naming Vemurafenib. Open Targets scores its association with cancer at 0.71 (direct and indirect evidence; datatypes clinical 0.67, affected pathway 0.86, literature 0.91, genetic association 0.00, somatic mutation 0.50).
- Target · the protein and the cell it sits on
- Drug · antibody, small molecule, cell or radioligand
- Effect · signal, damage or kill
In plain words · PIK3R2 (Phosphatidylinositol 3-kinase regulatory subunit beta) is a gene. The public catalogues list it as a drug target and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Melanoma.
- 1 · What it is
PIK3R2 (Phosphatidylinositol 3-kinase regulatory subunit beta) is a gene. The public catalogues list it as a drug target and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Melanoma.
- 2 · What goes wrong in cancer
Regulatory subunit of phosphoinositide-3-kinase (PI3K), a kinase that phosphorylates PtdIns(4,5)P2 (Phosphatidylinositol 4,5-bisphosphate) to generate phosphatidylinositol 3,4,5-trisphosphate (PIP3).
- 3 · How drugs use it
No product in this corpus aims at PIK3R2 yet. Drugs bind the molecule precisely: to switch it off, flag the cell for the immune system, or deliver a payload.
External identifiers
Sources: HGNC HGNC:8980 (approved symbol, name, aliases, locus and cross-references (hgnc_complete_set.txt)); UniProt O00459 (protein name, function text, keywords and locations (REST API)); CIViC gene PIK3R2 (3 evidence items, 0 assertions, 3 variants; diseases: Melanoma (GraphQL API, CC0)); Open Targets ENSG00000105647 (association with cancer (MONDO_0004992) 0.71; (GraphQL API, CC0))
Biology
Regulatory subunit of phosphoinositide-3-kinase (PI3K), a kinase that phosphorylates 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 signalling cascades involved in cell growth, survival, proliferation, motility and morphology. Binds to activated (phosphorylated) protein-tyrosine kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane. Indirectly regulates autophagy. Promotes nuclear translocation of XBP1 isoform 2 in a ER stress- and/or insulin-dependent manner during metabolic overloading in the liver and hence plays a role in glucose tolerance improvement. Locus 19p13.11 (HGNC).
- Melanoma: CIViC evidence names this disease
Notes
top- Written by scripts/fetch-cancer-genes.ts from CIViC, Open Targets, IntOGen, HGNC and UniProt; the function text is UniProt's, condensed and in UK spelling. Roles: Open Targets known-drug datatype score 0.67; CIViC holds 3 clinical evidence items on its variants. Evidence tier "clinical-evidence" is the strongest of those signals.
- Prevalence not recorded: none of the sources gives a positivity rate.
Latest papers
topQuery for this target: (TITLE:"PIK3R2" OR ABSTRACT:"PIK3R2" OR TITLE:"phosphoinositide-3-kinase regulatory subunit 2" OR ABSTRACT:"phosphoinositide-3-kinase regulatory subunit 2" OR TITLE:"Phosphatidylinositol 3-kinase regulatory subunit beta" OR ABSTRACT:"Phosphatidylinositol 3-kinase regulatory subunit beta" OR TITLE:"P85B" OR ABSTRACT:"P85B" OR TITLE:"p85" OR ABSTRACT:"p85" OR TITLE:"p85beta" OR ABSTRACT:"p85beta") AND (cancer OR tumor OR tumour OR oncology OR carcinoma OR lymphoma OR leukemia OR leukaemia OR myeloma OR sarcoma OR melanoma OR glioma). Results are unfiltered search hits about PIK3R2, not a curated reading list.