FLT1 Active Protein

This gene encodes a member of the vascular endothelial growth factor receptor (VEGFR) family. VEGFR family members are receptor tyrosine kinases (RTKs) which contain an extracellular ligand-binding region with seven immunoglobulin (Ig)-like domains, a transmembrane segment, and a tyrosine kinase (TK) domain within the cytoplasmic domain. This protein binds to VEGFR-A, VEGFR-B and placental growth factor and plays an important role in angiogenesis and vasculogenesis. Expression of this receptor is found in vascular endothelial cells, placental trophoblast cells and peripheral blood monocytes. Multiple transcript variants encoding different isoforms have been found for this gene. Isoforms include a full-length transmembrane receptor isoform and shortened, soluble isoforms. The soluble isoforms are associated with the onset of pre-eclampsia.[provided by RefSeq, May 2009]

VEGFR1: a receptor tyrosine kinase of the VEGFR family. Receptor for VEGF, VEGFB and PGF. The VEGF-kinase ligand/receptor signaling system plays a key role in vascular development and regulation of vascular permeability. Two splice variant isoforms have been described. Isoform SFlt1 may have an inhibitory role in angiogenesis.

Protein type: Protein kinase, TK; EC 2.7.10.1; Membrane protein, integral; Kinase, protein; Protein kinase, tyrosine (receptor); TK group; VEGFR family

Chromosomal Location of Human Ortholog: 13q12

Cellular Component: extracellular space; focal adhesion; integral to plasma membrane; plasma membrane; receptor complex; endosome

Molecular Function: identical protein binding; vascular endothelial growth factor receptor activity; protein binding; growth factor binding; transmembrane receptor protein tyrosine kinase activity; ATP binding

Biological Process: cell migration; peptidyl-tyrosine phosphorylation; protein amino acid autophosphorylation; positive regulation of phosphoinositide 3-kinase activity; positive regulation of vascular endothelial growth factor receptor signaling pathway; patterning of blood vessels; positive regulation of phosphoinositide 3-kinase cascade; positive regulation of MAP kinase activity; monocyte chemotaxis; positive regulation of angiogenesis; positive regulation of MAPKKK cascade; positive regulation of cell proliferation; blood vessel morphogenesis; embryonic morphogenesis; sprouting angiogenesis; cell differentiation; vascular endothelial growth factor receptor signaling pathway; transmembrane receptor protein tyrosine kinase signaling pathway; positive regulation of cell migration