NCIt definition : Neuropilin-1 (923 aa, 103 kDa) is encoded by the human NRP1 gene. This protein is
involved in growth factor-mediated signaling.;
NCIt note : Neuropilin-1 contains 1 MAM, 2 F5/8 type C, and 2 CUB domains and binds to semaphorin
3A, PLGF-2, VEGF-165, and VEGF-B. Isoform 1 appears to mediate chemorepulsion by semaphorins,
to increase VEGF-165 binding to KDR, and to regulate VEGF-induced angiogenesis. Expressed
in hepatocytes and kidney distal/proximal tubules, secreted 644-aa isoform 2 may bind
semaphorins and induce apoptosis by sequestering VEGF-165; it has an adverse effect
on blood vessel integrity. Expression of isoforms 1 and 2 does not seem to overlap.; Protein_Plays_Role_In_Biological_Process: Cardiovascular Development;