FUNCTION: SwissProt: P17948 # Receptor for VEGF, VEGFB and PGF. Has a tyrosine-protein kinase activity. The VEGF-kinase ligand/receptor signaling system plays a key role in vascular development and regulation of vascular permeability. Isoform SFlt1 may have an inhibitory role in angiogenesis.
SIZE: 1338 amino acids; 150769 Da
SUBUNIT: Interacts in vitro with various phosphotyrosine-binding proteins, including PLC-gammas, PTPN11, GRB2, CRK and NCK1.
SUBCELLULAR LOCATION: Isoform Flt1: Cell membrane; Single-pass type I membrane protein. & Isoform sFlt1: Secreted.
TISSUE SPECIFICITY: Mostly in normal lung, but also in placenta, liver, kidney, heart and brain tissues. Specifically expressed in most of the vascular endothelial cells, and also expressed in peripheral blood monocytes. It is not expressed in tumor cell lines. Isoform sFlt1 is strongly expressed in placenta.
SIMILARITY: SwissProt: P17948 ## Belongs to the protein kinase superfamily. Tyr protein kinase family. CSF-1/PDGF receptor subfamily. & Contains 7 Ig-like C2-type (immunoglobulin-like) domains. & Contains 1 protein kinase domain.