Anti-PI 3 Kinase p85 alpha/PIK3R1 Antibody Picoband®

Phosphatidylinositol 3-kinase regulatory subunit alpha is an enzyme that in humans is encoded by the PIK3R1 gene. Its gene is mapped to 5q13. the bovine PI3K p85 subunit consists of 2 closely related proteins, p85-alpha and p85-beta. They cloned cDNAs encoding both p85 subunits, each of which is a 724-amino acid polypeptide. Phosphatidylinositol 3-kinase plays an important role in the metabolic actions of insulin, and a mutation in this gene has been associated with insulin resistance.

Phosphatidylinositol 3-kinase regulatory subunit alpha; PI3-kinase regulatory subunit alpha; PI3K regulatory subunit alpha; PtdIns-3-kinase regulatory subunit alpha; Phosphatidylinositol 3-kinase 85 kDa regulatory subunit alpha; PI3-kinase subunit p85-alpha; PtdIns-3-kinase regulatory subunit p85-alpha; PIK3R1; GRB1

Isoform 2 is expressed in skeletal muscle and brain, and at lower levels in kidney and cardiac muscle. Isoform 2 and isoform 4 are present in skeletal muscle (at protein level) . .

Cancer, Cancer Susceptibility, Epigenetics and Nuclear Signaling, Immunology, Innate Immunity, MAPK Pathway, Oncoproteins, Oncoproteins/Suppressors, Protein Phosphorylation, Proto-Oncogenes, Ser/Thr Kinases, Serine/Threonine Kinases, Signal Transduction, TLR Signaling, Transcription

Binds to activated (phosphorylated) protein-Tyr kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane. Necessary for the insulin-stimulated increase in glucose uptake and glycogen synthesis in insulin-sensitive tissues. Plays an important role in signaling in response to FGFR1, FGFR2, FGFR3, FGFR4, KITLG/SCF, KIT, PDGFRA and PDGFRB. Likewise, plays a role in ITGB2 signaling (PubMed:17626883, PubMed:19805105, PubMed:7518429) . Modulates the cellular response to ER stress by promoting 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 (PubMed:20348923) . .

1. Volinia S, Patracchini P, Otsu M, Hiles I, Gout I, Calzolari E, Bernardi F, Rooke L, Waterfield MD (May 1992) . Chromosomal localization of human p85 alpha, a subunit of phosphatidylinositol 3-kinase, and its homologue p85 beta. Oncogene 7 (4) : 789–93. PMID 1314371. 2. Cannizzaro, L. A., Skolnik, E. Y., Margolis, B., Croce, C. M., Schlesinger, J., Huebner, K.The human gene encoding phosphatidylinositol 3-kinase associated p85-alpha is at chromosome region 5q12-13.Cancer Res.51: 3818-3820, 1991.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.

Phosphatidylinositol 3-kinase regulatory subunit alpha (PI3-kinase regulatory subunit alpha/PI3K regulatory subunit alpha/PtdIns-3-kinase regulatory subunit alpha)