TY - T1 - The activity of Sac1 across ER-TGN contact sites requires the four-phosphate-adaptor-protein-1 SN - / UR - http://hdl.handle.net/10138/305644 T3 - A1 - Venditti, Rossella; Masone, Maria Chiara; Rega, Laura Rita; Di Tullio, Giuseppe; Santoro, Michele; Polishchuk, Elena; Serrano, Ivan Castello; Olkkonen, Vesa M.; Harada, Akihiro; Medina, Diego L.; La Montagna, Raffaele; De Matteis, Maria Antonietta A2 - PB - Y1 - 2019 LA - eng AB - Phosphatidylinositol-4-phosphate (PI4P), a phosphoinositide with key roles in the Golgi complex, is made by Golgi-associated phosphatidylinositol-4 kinases and consumed by the 4-phosphatase Sac1 that, instead, is an ER membrane protein. Here, we show that the contact sites between the ER and the TGN (ERTGoCS) provide a spatial setting suitable for Sac1 to dephosphorylate PI4P at the TGN. The ERTGoCS, though necessary, are not sufficient for the phosphatase activity of Sac1 on TGN PI4P, since thi... VO - IS - SP - OP - KW - PHOSPHATASE SAC1; GOLGI; BINDING; PROTEIN; MULTIPLE; PHOSPHATIDYLINOSITOL-4-PHOSPHATE; LOCALIZATION; TRAFFICKING; TRANSPORT; EXPORT; 3111 Biomedicine; 1182 Biochemistry, cell and molecular biology N1 - PP - ER -