The PI3K D946A protein is a catalytically inactive mutant of PI3K with a D946A mutation in the ATP binding site. This recombinant catalytically inactive protein can be used as a negative control in any kind of PI3K kinase activity studies. Recombinant full length PI3K DA mutant carries a N-terminal GST-Tag and was purified by affinity chromatography. The GST-Tag facilitates the protein’s application in typical GST pull-down assays.
Phosphoinositide 3-kinases (PI3Ks) phosphorylate (PIs) at their 3´-OH position generating lipid second messengers and thereby regulate numerous biological processes including cell growth,differentiation, survival, proliferation, migration and metabolism. On the basis of structural similarities and substrate specificity, the PI3K family can be subdivided into three classes termed I, II, and III. All human class I members are heterodimers consisting of a catalytic subunit (MW approx. 110kD) and a noncatalytic subunit (MW 50, 55, 85, or 101kD) and are known tophosphorylate phosphatidylinositol (PI), phosphatidylinositol-4-mono-phosphate (PIP) andphosphatidylinositol-4,5-bisphosphate (PIP2) in vitro. The class I members can be further subdivided into class IA and IB PI3Ks. Class IA exists in three isoforms (p110 , p110 and p110 ) whereas the only class IB member is termed p110. Class IA PI3Ks are activated by adaptorproteins such as Ras or BCAP, or tyrosine-kinase-associated receptors including antigen, co-stimulatory and cytokine receptors (e.g. CD19, CD28, Insulin receptor, EGFR, and PDGFR). p110 is activated by G-protein-coupled receptors (GPCRs). Effectors of class I PI3Ks are pleckstrin-homology domain proteins such as Akt/PKB, BTK, TEC, ITK, BAM32, and small GTPases (e.g. Cdc42, Rac, or Ras). The action of PI3Ks is regulated by the phosphatidylinositol- 3,4,5-trisphosphate phosphatases SHIP and PTEN.
Molecular Weight:126.3 kD (without Tag)
Storage and Stability:May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
