01810nas a2200229   4500008004100000245008100041210006900122260001400191300001500205490000700220520117000227100001401397700001301411700001301424700001501437700002201452700001101474700001501485700001701500700001501517856004801532       1997                        eng d00aProteolytic processing regulates receptor specificity and activity of VEGF-C0 aProteolytic processing regulates receptor specificity and activi  c1997/Jul/  a3898 - 9110 v163 aThe recently identified vascular endothelial growth factor C (VEGF-C) belongs to the platelet-derived growth factor (PDGF)/VEGF family of growth factors and is a ligand for the endothelial-specific receptor tyrosine kinases VEGFR-3 and VEGFR-2. The VEGF homology domain spans only about one-third of the cysteine-rich VEGF-C precursor. Here we have analysed the role of post-translational processing in VEGF-C secretion and function, as well as the structure of the mature VEGF-C. The stepwise proteolytic processing of VEGF-C generated several VEGF-C forms with increased activity towards VEGFR-3, but only the fully processed VEGF-C could activate VEGFR-2. Recombinant 'mature' VEGF-C made in yeast bound VEGFR-3 (K[D] = 135 pM) and VEGFR-2 (K[D] = 410 pM) and activated these receptors. Like VEGF, mature VEGF-C increased vascular permeability, as well as the migration and proliferation of endothelial cells. Unlike other members of the PDGF/VEGF family, mature VEGF-C formed mostly non-covalent homodimers. These data implicate proteolytic processing as a regulator of VEGF-C activity, and reveal novel structure-function relationships in the PDGF/VEGF family.1 aJoukov, V1 aSorsa, T1 aKumar, V1 aJeltsch, M1 aClaesson-Welsh, L1 aCao, Y1 aSaksela, O1 aKalkkinen, N1 aAlitalo, K  uhttp://view.ncbi.nlm.nih.gov/pubmed/9233800