Enables vascular endothelial growth factor receptor activity. Involved in several processes, including positive regulation of cell migration involved in sprouting angiogenesis; positive regulation of filopodium assembly; and vascular endothelial growth factor receptor signaling pathway. Acts upstream of or within with a positive effect on angiogenesis involved in wound healing and cell activation. Acts upstream of or within several processes, including axon development; circulatory system development; and regulation of neuron projection development. Predicted to be located in membrane. Predicted to be active in axon; focal adhesion; and plasma membrane. Is expressed in several structures, including cardiovascular system; cranial neural crest cell; hematopoietic stem cell; hypochord; and nervous system. Human ortholog(s) of this gene implicated in lung non-small cell carcinoma and tetralogy of Fallot. Orthologous to human NRP1 (neuropilin 1).