FRS3 is an adapter protein that links FGR and NGF receptors to downstream signaling pathways. FRS3 is involved in the activation of MAP kinases. FRS3 down-regulates ERK2 signaling by interfering with the phosphorylation and nuclear translocation of ERK2.The protein encoded by this gene is a substrate for the fibroblast growth factor receptor. It is found in peripheral plasma membrane and functions in linking FGF receptor stimulation to activators of Ras. Publication Note: This RefSeq record includes a subset of the publications that are available for this gene. Please see the Entrez Gene record to access additional publications.