Description
Recombinant full length human PI3K (p55 gamma) was expressed by baculovirus in Sf9 insect cells using an N-terminal His tag.
Scientific Background: PI3K (p55 gamma) also known as PI3K regulatory subunit 3 (PIK3R3) was first identified by 2-hybrid system as a protein that bind to the intracellular domain of IGF1R. PIK3R3 contains 2 Src homology-2 (SH2) domains, an inter-SH2/p110-binding site and a proline-rich motif. PIK3R3 transcript is detected in all fetal and adult tissues except peripheral blood leukocytes. Expression is low in adult liver and most abundant in adult testis. PIK3R3 can bind IGF1R, INSR, and INSR substrate-1 in vitro and the binding requires receptor activation (1)