||Tyrosine-protein kinase that acts as cell-surface receptor for fibroblast growth factors and plays an essential role in the regulation of embryonic development, cell proliferation, differentiation and migration. Required for normal mesoderm patterning and normal skeletogenesis. Phosphorylates PLCG1, FRS2, GAB1 and SHB. Ligand binding leads to the activation of several signaling cascades. Activation of PLCG1 leads to the production of the cellular signaling molecules diacylglycerol and inositol-1,4,5-trisphosphate. Phosphorylation of FRS2 triggers recruitment of GRB2, GAB1, PIK3R1 and SOS1, and mediates activation of RAS, MAPK1/ERK2, MAPK3/ERK1 and the MAP kinase signaling pathway, as well as of the AKT1 signaling pathway. Promotes phosphorylation of SHC1, STAT1 and PTPN11/SHP2. In the nucleus, enhances RPS6KA1 and CREB1 activity and contributes to the regulation of transcription. FGFR1 signaling is down-regulated by ubiquitination, internalization and degradation (By similarity).
||Cell membrane, Single-pass type I membrane protein, Nucleus, Cytoplasm, cytosol, Cytoplasmic vesicle
||Protein kinase superfamily, Tyr protein kinase family, Fibroblast growth factor receptor subfamily
||Initially expressed in adaxial mesoderm with transcripts distinctly localized to the anterior portion of each half-somite. Hereupon, also strongly expressed in the otic vesicles, branchial arches and the brain, especially at the midbrain-hindbrain boundar