Binds directly and specifically 1,2-Diacyl-sn-glycero-3-phospho-(1'-myo-inositol-3',4',5'-bisphosphate) (PIP3) leading to the recruitment of PIP3 to mitochondria and may play a role in the regulation of the platelet activation via AKT/GSK3B/cGMP signaling pathways (PubMed:30576423, PubMed:29786068). May act as transcription factor that regulates SREBP1 (isoform SREBP-1C) expression in order to modulate triglyceride (TG) homeostasis in hepatocytes (By similarity). Highly expressed in platelet (at protein level) (PubMed:29786068, PubMed:30576423). Expressed in liver, brain, heart and muscle (PubMed:29786068). Belongs to the FUN14 family.