NGI-1

NGI-1 (ML414) is a potent oligosaccharyltransferase (OST) inhibitor, directly targeting and blocking the function of the OST catalytic subunits STT3A and STT3B^[1]. NGI-1 is a cell permeable inhibitor and can effectively reduce virus infectivity without affecting cell viability^[2]. IC50 & Target:OST^[1] In Vitro:NGI-1 inhibits the glycosylation of LASV GP mediated by STT3A-OST (in STT3B- and MAGT1-TUSC3- cells) or STT3B-OST (in STT3A- cells) and impaires its proteolytic cleavage in a dose-dependent manner^[1].
NGI-1 blocks EGFR N-linked glycosylation in lung adenocarcinoma cells as assessed. In controls EGFR is biotinylated, consistent with its plasma membrane expression, but in NGI-1 treated cells the EGFR is predominantly found in the non-biotinylated intracellular fraction suggesting a change in cellular localization^[2].