Receptor for VEGF or VEGFC. 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. In case of HIV-1 infection, the interaction with extracellular viral Tat protein seems to enhance angiogenesis in Kaposis sarcoma lesions Lamalice L, et al. (2004). Oncogene.23(2): 434-445. Takahashi T, et al. (2001). EMBO J .20(11): 2768-2778.