Western Blotting (WB), Immunofluorescence (IF), Immunoprecipitation (IP)
Specificity
This antibody reacts with p85alpha, which is regulatory subunit of PI3-kinase on Western blot, Immunoprecipitation and Immunocytochemistry. This antibody recognizes mutant p85alpha protein expressed in E. coli to be possessed in amino acid position '1-79' described below. This antibody does not react with p85beta.
Phosphoinositide 3-kinase (PI3K) family of enzymes generate 3-phosphorylated phosphoinositides that act as second messengers downstream of numerous cellular receptors. This family control several cellular responses including cell growth, survival cytoskeletal remodeling and the trafficking of intracellular organelles in many different cell types. There are four subgroups (class IA, IB, II, III) of PI3K with distinct structure and substrate specificity. Class IA PI3K, which function downstream of activated tyrosine kinases, are heterodimers composed of a p110 catalytic subunit (a, b, or o) and a tightly associated regulatory subunit (p85a, p55a, p50a, p85B, or p55y). Each regulatory subunit can interchangeably associate with different catalytic subunits and shows a unique tissue distribution. p85a is the major regulatory subunit of class IA PI3Ks in most types of cells including immune cells.Synonyms: PI3-kinase subunit p85-alpha, PI3K regulatory subunit alpha, Phosphatidylinositol 3-kinase regulatory subunit alpha, PtdIns-3-kinase regulatory subunit alpha