Skip to main content

Domain

The first and second Ig-like C2-type (immunoglobulin-like) domains are sufficient for VEGFC binding (PubMed:23878260). The fourth and fifth Ig-like C2-type domains are sufficient for homodimerization (PubMed:23878260). The fifth and seventh Ig-like C2-type domains are required for autophosphorylation and further activation (PubMed:23878260).

Function

Tyrosine-protein kinase that acts as a cell-surface receptor for VEGFC and VEGFD, and plays an essential role in adult lymphangiogenesis and in the development of the vascular network and the cardiovascular system during embryonic development. Promotes proliferation, survival and migration of endothelial cells, and regulates angiogenic sprouting. Signaling by activated FLT4 leads to enhanced production of VEGFC, and to a lesser degree VEGFA, thereby creating a positive feedback loop that enhances FLT4 signaling. Modulates KDR signaling by forming heterodimers. The secreted isoform 3 may function as a decoy receptor for VEGFC and/or VEGFD and play an important role as a negative regulator of VEGFC-mediated lymphangiogenesis and angiogenesis. Binding of vascular growth factors to isoform 1 or isoform 2 leads to the activation of several signaling cascades; isoform 2 seems to be less efficient in signal transduction, because it has a truncated C-terminus and therefore lacks several phosphorylation sites. Mediates activation of the MAPK1/ERK2, MAPK3/ERK1 signaling pathway, of MAPK8 and the JUN signaling pathway, and of the AKT1 signaling pathway. Phosphorylates SHC1. Mediates phosphorylation of PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase. Promotes phosphorylation of MAPK8 at 'Thr-183' and 'Tyr-185', and of AKT1 at 'Ser-473'.

Involvement in disease

Lymphatic malformation 1

LMPHM1

A form of primary lymphedema, a disease characterized by swelling of body parts due to developmental anomalies and functional defects of the lymphatic system. Patients with lymphedema may suffer from recurrent local infections. LMPHM1 is an autosomal dominant form with variable expression and severity. Onset is usually at birth or in early childhood but can occur later. Affected individuals manifest lymphedema, predominantly in the lower limbs, and hypoplasia of lymphatic vessels. Additional features are hemangioma and nail dysplasia or papillomatosis.

None

The disease is caused by variants affecting the gene represented in this entry.

Hemangioma, capillary infantile

HCI

A condition characterized by dull red, firm, dome-shaped hemangiomas, sharply demarcated from surrounding skin, usually presenting at birth or occurring within the first two or three months of life. They result from highly proliferative, localized growth of capillary endothelium and generally undergo regression and involution without scarring.

None

Disease susceptibility is associated with variants affecting the gene represented in this entry.

Plays an important role in tumor lymphangiogenesis, in cancer cell survival, migration, and formation of metastases.

Congenital heart defects, multiple types, 7

CHTD7

An autosomal dominant disorder with incomplete penetrance characterized by congenital developmental abnormalities involving structures of the heart. Common defects include tetralogy of Fallot, pulmonary stenosis or atresia, absent pulmonary valve, right aortic arch, double aortic arch, and major aortopulmonary collateral arteries.

None

The disease is caused by variants affecting the gene represented in this entry.

Post-translational modifications

Autophosphorylated on tyrosine residues upon ligand binding. Autophosphorylation occurs in trans, i.e. one subunit of the dimeric receptor phosphorylates tyrosine residues on the other subunit. Phosphorylation in response to H(2)O(2) is mediated by a process that requires SRC and PRKCD activity. Phosphorylation at Tyr-1068 is required for autophosphorylation at additional tyrosine residues. Phosphorylation at Tyr-1063 and Tyr-1337 is important for interaction with CRK and subsequent activation of MAPK8. Phosphorylation at Tyr-1230, Tyr-1231 and Tyr-1337 is important for interaction with GRB2 and subsequent activation of the AKT1 and MAPK1/ERK2 and/or MAPK3/ERK1 signaling pathways. In response to endothelial cell adhesion onto collagen, can also be phosphorylated in the absence of FLT4 kinase activity by SRC at Tyr-830, Tyr-833, Tyr-853, Tyr-1063, Tyr-1333, and Tyr-1337.

Sequence similarities

Belongs to the protein kinase superfamily. Tyr protein kinase family. CSF-1/PDGF receptor subfamily.

Tissue specificity

Detected in endothelial cells (at protein level). Widely expressed. Detected in fetal spleen, lung and brain. Detected in adult liver, muscle, thymus, placenta, lung, testis, ovary, prostate, heart, and kidney.

Cellular localization

  • Cell membrane
  • Single-pass type I membrane protein
  • Cytoplasm
  • Nucleus
  • Ligand-mediated autophosphorylation leads to rapid internalization.
  • Isoform 1
  • Cell membrane
  • Single-pass type I membrane protein
  • Ligand-mediated autophosphorylation leads to rapid internalization.
  • Isoform 2
  • Cell membrane
  • Single-pass type I membrane protein
  • Isoform 3
  • Secreted
  • Cytoplasm

Alternative names

VEGFR3, FLT4, Vascular endothelial growth factor receptor 3, VEGFR-3, Fms-like tyrosine kinase 4, Tyrosine-protein kinase receptor FLT4, FLT-4

Target type

Proteins

Primary research area

Oncology

Other research areas

  • Immuno-oncology

Molecular weight

152757Da

We found 33 products in 4 categories