- Catalog number
- A01091-1
- Size / count
- 100 µg/Vial
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit beta isoform is an enzyme that in humans is encoded by the PIK3CB gene. This gene encodes an isoform of the catalytic subunit of phosphoinositide 3-kinase (PI3K) . These kinases are important in signaling pathways involving receptors on the outer membrane of eukaryotic cells and are named for their catalytic subunit. The encoded protein is the catalytic subunit for PI3Kbeta (PI3KB) . PI3KB has been shown to be part of the activation pathway in neutrophils which have bound immune complexes at sites of injury or infection. Alternative splicing results in multiple transcript variants.
- Synonyms
- Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit beta isoform; PI3-kinase subunit beta; PI3K-beta; PI3Kbeta; PtdIns-3-kinase subunit beta;2.7.1.153; Phosphatidylinositol 4,5-bisphosphate 3-kinase 110 kDa catalytic subunit beta; PtdIns-3-kinase subunit p110-beta; p110beta; PIK3CB; PIK3C1
- Gene Name
- PIK3CB
- Gene ID
- 5291
- UniProt
- P42338
- Host
- Rabbit
- Reactivity
- Human, Mouse, Rat
- Cross Reactivity
- No cross-reactivity with other proteins
- Immunogen
- A synthetic peptide corresponding to a sequence in the middle region of human PIK3CB, different from the related mouse and rat sequences by one amino acid.
- Clonality
- Polyclonal
- Tissue Specificity
- Expressed ubiquitously.
- Applications
- IHC, WB
- Field of Research
- Metabolism Of Carbohydrates, Mitochondrial, Mitochondrial Markers, Mitochondrial Metabolism, Oxidative Phosphorylation, Oxidative Stress, Pathways and Processes, Redox Metabolism, Signal Transduction
- Purification
- Immunogen affinity purified.
- Concentration
- Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml.
- Form
- Lyophilized
- Reconstitution
- Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
- Function
- Phosphoinositide-3-kinase (PI3K) that phosphorylates PtdIns (Phosphatidylinositol), PtdIns4P (Phosphatidylinositol 4- phosphate) 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. Involved in the activation of AKT1 upon stimulation by G-protein coupled receptors (GPCRs) ligands such as CXCL12, sphingosine 1-phosphate, and lysophosphatidic acid. May also act downstream receptor tyrosine kinases. Required in different signaling pathways for stable platelet adhesion and aggregation. Plays a role in platelet activation signaling triggered by GPCRs, alpha-IIb/beta-3 integrins (ITGA2B/ ITGB3) and ITAM (immunoreceptor tyrosine-based activation motif) -bearing receptors such as GP6. Regulates the strength of adhesion of ITGA2B/ ITGB3 activated receptors necessary for the cellular transmission of contractile forces. Required for platelet aggregation induced by F2 (thrombin) and thromboxane A2 (TXA2) . Has a role in cell survival. May have a role in cell migration. Involved in the early stage of autophagosome formation. Modulates the intracellular level of PtdIns3P (Phosphatidylinositol 3-phosphate) and activates PIK3C3 kinase activity. May act as a scaffold, independently of its lipid kinase activity to positively regulate autophagy. May have a role in insulin signaling as scaffolding protein in which the lipid kinase activity is not required. May have a kinase-independent function in regulating cell proliferation and in clathrin-mediated endocytosis. Mediator of oncogenic signal in cell lines lacking PTEN. The lipid kinase activity is necessary for its role in oncogenic transformation. Required for the growth of ERBB2 and RAS driven tumors. .
- References & Citations
- 1. Hu P, Mondino A, Skolnik EY, Schlessinger J (Jan 1994) . Cloning of a novel, ubiquitously expressed human phosphatidylinositol 3-kinase and identification of its binding site on p85. Mol Cell Biol. 13 (12) : 7677–88. 2. “Entrez Gene: PIK3CB phosphoinositide-3-kinase, catalytic, beta polypeptide.
- Storage Conditions
- 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.
- Calculated Molecular Weight
- 122762 MW
- Observed Molecular Weight
- 110 kDa
- Specificity
- No cross reactivity with other proteins.
- Gene Name Synonym
- Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit beta isoform
- Subcellular Location
- Cytoplasm . Nucleus . Interaction with PIK3R2 is required for nuclear localization and export.
- Protein Name
- Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit beta isoform
- Isotype
- Rabbit IgG
- Contents
- Each vial contains 4mg Trehalose, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg NaN3.
