FLT1 Information: FLT1 Protein, FLT1 Antibody and FLT1 Gene

FLT1 Gene family

FLT1 Protein

FLT1 protein function

Tyrosine-protein kinase that acts as a cell-surface receptor for VEGFA, VEGFB and PGF, and plays an essential role in the development of embryonic vasculature, the regulation of angiogenesis, cell survival, cell migration, macrophage function, chemotaxis, and cancer cell invasion. May play an essential role as a negative regulator of embryonic angiogenesis by inhibiting excessive proliferation of endothelial cells. Can promote endothelial cell proliferation, survival and angiogenesis in adulthood. Its function in promoting cell proliferation seems to be cell-type specific. Promotes PGF-mediated proliferation of endothelial cells, proliferation of some types of cancer cells, but does not promote proliferation of normal fibroblasts (in vitro). Has very high affinity for VEGFA and relatively low protein kinase activity; may function as a negative regulator of VEGFA signaling by limiting the amount of free VEGFA and preventing its binding to KDR. Likewise, isoforms lacking a transmembrane domain, such as isoform 2, isoform 3 and isoform 4, may function as decoy receptors for VEGFA. Modulates KDR signaling by forming heterodimers with KDR. Ligand binding leads to the activation of several signaling cascades. Activation of PLCG leads to the production of the cellular signaling molecules diacylglycerol and inositol 1,4,5-trisphosphate and the activation of protein kinase C. Mediates phosphorylation of PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase, leading to activation of phosphatidylinositol kinase and the downstream signaling pathway. Mediates activation of MAPK1/ERK2, MAPK3/ERK1 and the MAP kinase signaling pathway, as well as of the AKT1 signaling pathway. Phosphorylates SRC and YES1, and may also phosphorylate CBL. Isoform 1 phosphorylates PLCG. Promotes phosphorylation of AKT1 at 'Ser-473'. Promotes phosphorylation of PTK2/FAK1. Isoform 7 has a truncated kinase domain; it increases phosphorylation of SRC at 'Tyr-418' by unknown means and promotes tumor cell invasion. {ECO:0000269|PubMed:11141500, ECO:0000269|PubMed:11312102, ECO:0000269|PubMed:11811792, ECO:0000269|PubMed:12796773, ECO:0000269|PubMed:14633857, ECO:0000269|PubMed:15735759, ECO:0000269|PubMed:16685275, ECO:0000269|PubMed:18079407, ECO:0000269|PubMed:18515749, ECO:0000269|PubMed:18583712, ECO:0000269|PubMed:18593464, ECO:0000269|PubMed:20512933, ECO:0000269|PubMed:20551949, ECO:0000269|PubMed:21752276, ECO:0000269|PubMed:7824266, ECO:0000269|PubMed:8248162, ECO:0000269|PubMed:8605350, ECO:0000269|PubMed:9299537}.

FLT1 protein expression

Tissue specificity

Detected 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. Isoform 2 is strongly expressed in placenta. Isoform 3 is expressed in corneal epithelial cells (at protein level). Isoform 3 is expressed in vascular smooth muscle cells (VSMC).


Up-regulated in coculture of VSMC/endothelial cell (EC) or by direct exposure to VEGF of VSMC monoculture. Up-regulated from the second trimester of pregnancy to the term and in the placenta of women with preeclampsia (PE). Up-regulated in monocytes exposed to bacterial lipopolysaccharide (LPS).

FLT1 protein sequence

This sequence information is just for reference only.From Uniport

  • Length
  • Mass (KDa)

FLT1 Antibody

There are 7 FLT1 antibodies which are validated in multiple tissues with various applications, including ELISA, ICC/IF. There are 7 FLT1 antibody for ELISA, 2 FLT1 antibody for ICC/IF. Among all these FLT1 antibodies, there are 1 anti-FLT1 mouse monoclonal antibodies , 5 anti-FLT1 rabbit polyclonal antibodies , 1 anti-FLT1 rabbit monoclonal antibodies . All the FLT1 anbodies are produced in house and all are in stock. FLT1 antibody customerized service is available.

FLT1 Gene

FLT1 gene / cDNA is a protein-coding gene which located on 13q12.3. The FLT1 gene is conserved in chimpanzee, Rhesus monkey, dog, cow, mouse, chicken, and zebrafish.213 organisms have orthologs with human gene FLT1.