This gene encodes a tyrosine kinase receptor for vascular endothelial growth factors C and D. The protein is thought to be involved in lymphangiogenesis and maintenance of the lymphatic endothelium. Mutations in this gene cause hereditary lymphedema type IA. [provided by RefSeq, Jul 2008],
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Function:
Catalytic activity:ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate.,Disease:Defects in FLT4 are found in juvenile hemangioma. Juvenile hemangiomas are the most common tumors of infancy, occurring as many as 10% of all births. These benign vascular lesions enlarge rapidly during the first year of life by hyperplasia of endothelial cells and attendant pericytes, and then spontaneously involute over a period of years, leaving loose fibrofatty tissue.,Disease:Defects in FLT4 are the cause of lymphedema hereditary type 1 (LYH1A) [MIM:153100]; also known as Nonne-Milroy lymphedema or Milroy disease. Hereditary lymphedema is a chronic disabling condition which results in swelling of the extremities due to altered lymphatic flow. Patients with lymphedema suffer from recurrent local infections and physical impairment.,Function:Receptor for VEGFC. Has a tyrosine-protein kinase activity.,online information:FLT4 entry,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family.,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. CSF-1/PDGF receptor subfamily.,similarity:Contains 1 protein kinase domain.,similarity:Contains 7 Ig-like C2-type (immunoglobulin-like) domains.,tissue specificity:Placenta, lung, heart, and kidney, does not seem to be expressed in pancreas and brain.,
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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.
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Tissue Expression:
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.
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Research Areas:
>>MAPK signaling pathway ;
>>Ras signaling pathway ;
>>Rap1 signaling pathway ;
>>Calcium signaling pathway ;
>>PI3K-Akt signaling pathway ;
>>Focal adhesion ;
>>Pathways in cancer ;
>>Breast cancer