Probable proto-oncogene that functions in the epidermal growth factor receptor/EGFR signaling pathway. May activate both the EGFR itself and downstream RAS/MAPK and PI3K/AKT/TOR signaling cascades. Interacts with EGFR; the interaction is disrupted by EGF stimulation. Interacts with RAF1; displaces 14-3-3 proteins from RAF1 and activates RAF1 within the RAS/MAPK signaling cascade. Interacts with AKT1, PIK3CA and PIK3R1; activates the PI3K/AKT signaling cascade. Belongs to the FAM83 family.