Fig. 5: Polyubiquitination is required for SERINC5 downregulation by HIV-1 Nef.

A Ser5 and its lysine mutants were expressed with HIV-1 Nef in HEK293T cells, and their expression was analyzed by WB. Ctrl, control vector. B Ser5 and its lysine mutants were expressed with Ub and Nef in HEK293T cells, and their expression was analyzed by WB. C Ser5-VN and its lysine mutants were expressed with Nef-VC in HeLa cells. Cells were stained with DAPI and anti-HA for Ser5, and BiFC fluorescent signals were detected by confocal microscopy (scale bar 2 or 5 µm). Experiments were repeated twice, and representative experiments are shown. Source data are provided as a Source Data file.