Figure 5.
Non-polarized HeLa cells sort proteins into apical-like (PKD-independent) and basolateral-like (PKD-dependent) pathways. HeLa cells were co-transfected with PKD2-WT or PKD2-KD and either WTp75 (apical surface protein) or ΔBS-p75 (basolateral). Amounts of WTp75 or ΔBS-p75 on the cell surface were determined by surface biotinylation (see Methods). Expression of PKD2-KD selectively decreased the efficiency of transport of ΔBS-p75 to the plasma membrane but had no effect on the exocytosis of WTp75.