Figure 6.
TRBP serines 283/286 are essential for the TRBP/S6K2 interaction in HDLECs. (A) PLA analysis of TRBP and S6K2 in HDLECs transduced with TRBP-WT (150 ml/80 000 cells), TRBP-AA (600 ml/80 000 cells), and TRBP-DD lentiviruses (200 ml/80 000 cells). The used volumes were calculated and verified to ensure equal TRBP protein expression between WT and mutant TRBP proteins. Nuclei (blue) and F-actin (green) staining are also shown (scale bar: 10 μm). PLA events (in red) are indicated with yellow arrows. B. Dot plot illustrating mean number of TRBP/S6K2 PLA events detected under the same conditions with (A). Values presented are means ± SD. P values are shown (*P < 0.05; ***P < 0.001). (C) Co-immunoprecipitation of S6K2 and TRBP in HEK293 cells over-expressing S6K2 and TRBP. Cells were transduced with S6K2 and TRBP-WT or TRBP-DD lentiviruses and harvested for immunoprecipitations when 80% confluent. (D) Quantification of co-immunoprecipitated TRBP with S6K2 in cells overexpressing TRBP-WT or TRBP-DD.