(A, B) Flag-TELO2 (A) or Flag-DDB1 (B) were transfected in HEK293 cells pretreated with DMSO or CGP57380 as shown. Lysates were subjected to Flag-IP and immunoblot.
(C) HEK293 cells were transfected with empty vector (PC3), Flag-MNK1, or Flag-MNK2 and treated with DMSO, TPA, or TPA + CGP57380 as shown. Flag-IP of lysates and immunoblot analysis was performed to determine changes in MNK associations defined in Figure 4.
(D) HEK293 cells were transfected with ctrl or TELO2-targeting siRNA followed by transfection with empty vector (PC3) or Flag-MNK2. MNK2 IP and immunoblot analysis were performed as in (C). The assay was performed 3 times; a representative series is shown.
(E) Dox-inducible HA-Raptor expressing HEK293 cells were treated with mock (DMSO) or TPA, lysates were prepared and subjected to HA-IP, and immunoprecipitated proteins were analyzed by immunoblot as shown.
(A–E) Quantitations are averages from 3 (A, C, E) or 2 (B) independent assays, normalizing control values to 1.