Catalytic activity:ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. ,Function:Receptor for acidic fibroblast growth factor. Does not bind to basic fibroblast growth factor. Binds FGF19. ,PTM:Glycosylated (By similarity) . Phosphorylated on tyrosine residue (By similarity) . Phosphorylation requires the presence of a functional (phosphorylated) FGFR1 and not necessarily by means of FGFR heterodimerization. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. Fibroblast growth factor receptor subfamily. ,similarity:Contains 1 protein kinase domain. ,similarity:Contains 3 Ig-like C2-type (immunoglobulin-like) domains. ,subcellular location:Isoform 2 may be secreted. ,subunit:Interacts with KLB. ,tissue specificity:Expressed in gastrointestinal epithelial cells , pancreas , and gastric and pancreatic cancer cell lines. ,
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