PIK3R1 is a regulatory subunit of phosphoinositide-3-kinase. Mediates binding to a subset of tyrosine-phosphorylated proteins through its SH2 domain. Acts as an adapter, mediating the association of the p110 catalytic unit of the alpha, beta and delta enzymes to the plasma membrane, where p110 phosphorylates inositol lipids. May play an additional role in the regulation of the actin cytoskeleton. Necessary for the insulin-stimulated increase in glucose uptake and glycogen synthesis in insulin-sensitive tissues. Its SH2 domains interacts with the YTHM motif of phosphorylated INSR in vitro. Defects in PIK3R1 are a cause of severe insulin resistance. Four alternatively spliced isoforms have been described.

PI3-kinase p85- alpha抗体, gamma抗体;GRB 1, GRB1, p85 alpha, p85, P85A_HUMAN, Phosphatidylinositol 3 kinase associated p 85 alpha, Phosphatidylinositol 3 kinase regulatory 1, Phosphatidylinositol 3 kinase regulatory subunit alpha, Phosphatidylinositol 3 kinase regulatory subunit polypeptide 1 (p85 alpha), Phosphatidylinositol 3-kinase 85 kDa regulatory subunit alpha, Phosphatidylinositol 3-kinase regulatory subunit alpha, Phosphoinositide 3 kinase regulatory subunit 1 (alpha), Phosphoinositide 3 kinase regulatory subunit 1 (p85 alpha), Phosphoinositide 3 kinase regulatory subunit 1, Phosphoinositide 3 kinase regulatory subunit polypeptide 1 (p85 alpha), PI3 kinase p85 subunit alpha, PI3-kinase regulatory subunit alpha, PI3-kinase subunit p85-alpha, PI3K, PI3K regulatory subunit alpha, Pik3r1, PtdIns 3 kinase p85 alpha, PtdIns-3-kinase regulatory subunit alpha, PtdIns-3-kinase regulatory subunit p85-alpha

Rabbit

Phospho-PI3-kinase p85- alpha (Tyr607) Antibody detects endogenous levels of PI3-kinase p85- alpha only when phosphorylated at Tyrosine 607.

Human;Mouse;Rat;Pig

Rabbit;Sheep;Dog;Bovine;Horse

WB 1:500-1:2000, IHC 1:50-1:200, ICC/IF 1:100-500, ELISA(peptide) 1:20000-1:40000

Predicted molecular weight: 84kD
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

A synthesized peptide derived from Human PIK3R1(Accession P27986), corresponding to amino acid residues K592-E621.

1mg/ml

The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho- and non-phospho-peptide affinity columns.

Polyclonal Antibody

Store at -20 °C for one year. Avoid repeated freeze/thaw cycles

Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.Store at -20 °C.Stable for 12 months from date of receipt.

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).

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).

Polyubiquitinated in T-cells by CBLB; which does not promote proteasomal degradation but impairs association with CD28 and CD3Z upon T-cell activation.Phosphorylated. Tyrosine phosphorylated in response to signaling by FGFR1, FGFR2, FGFR3 and FGFR4. Phosphorylated by CSF1R. Phosphorylated by ERBB4. Phosphorylated on tyrosine residues by TEK/TIE2. Dephosphorylated by PTPRJ. Phosphorylated by PIK3CA at Ser-608; phosphorylation is stimulated by insulin and PDGF. The relevance of phosphorylation by PIK3CA is however unclear (By similarity). Phosphorylated in response to KIT and KITLG/SCF. Phosphorylated by FGR.

Cytosol;Endoplasmic reticulum;Nucleus;Plasma Membrane;

P27986