[Encoded by human NRP1 Gene (Neuropilin Family), Neuropilin 1 contains 1 MAM, 2 F5/8 type C, and 2 CUB domains. Found in embryonic nervous system, and adult heart, placenta lung, liver, skeletal muscle, kidney, and pancreas, type I membrane-bound 923-aa 103-kDa (precursor) isoform 1, expressed by blood vessels, acts as a receptor in cardiovascular development, angiogenesis, formation of neuronal circuits, and organogenesis. Binding 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. (NCI) ( NCI )]
UMLS (NCI) C0100804 - Amino Acid, Peptide, or Protein
- Receptor
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