Figure 6.
The SLC1 is taken up by the endothelial cell via E-selectin-mediated endocytosis and reaches upon engulfment a late endosomal compartment; via the KDEL-receptor bearing Golgi, SLC1 is passed through the ER in a retrograde fashion. In the ER, the ETAII is cleaved by furin and the C-terminal NBP element is released into the cytoplasm. Subsequently the recombinant NBP traps NEMO and leads to inhibition of IKK complex assembly (right panel). As SLC1 treatment results in a blockade of IKK assembly, subsequent steps of cytokine-induced NF-kappaB activation and finally translocation of p50/p65 dimers into the nucleus are blocked in the endothelial cells (blocked steps are marked with red crosses).