Neuropilin-1 (NRP1)

The membrane-bound isoform 1 is a receptor involved in the development of the cardiovascular system, in angiogenesis, in the formation of specific neuronal circuits and in organogenesis outside the nervous system. It mediates the chemorepulsant action of semaphorins.

It contrasts to semaphorin 3A, The PLGF-2 isoform of PGF, The VEGF165 isoform of VEGFA and VEGFB. Coexpression with KDR results in increased VEGF165 binding to KDR in addition to increased chemotaxis.