The activity of Sac1 across ER-TGN contact sites requires the four-phosphate-adaptor-protein-1.
Venditti R, Masone MC, Rega LR, Di Tullio G, Santoro M, Polishchuk E, Serrano IC, Olkkonen VM, Harada A, Medina DL, et al. J Cell Biol. 2019 Mar 4; 218(3):783-797. Epub 2019 Jan 18.