Human βActin was purchased from Sigma-Aldrich (France). RHOA GTPase fused to either an amino terminal Chitin Binding Domain or a streptactin binding peptide were produced in HEK293 cells. EGFP (as mCherry) in fusion with a streptavidine binding peptide (SBP) were produced through in vitro translation system (Roche Life Science, France) and used directly for screening without the need for purification.

Biotinylated Tubulin was purchased from Cytoskeleton, Inc. (Denver, United States). For p53, the 83 first amino acids of the NP_000537.3 isoform were produced in bacteria with a SNAP and His Tag, purified using Talon resin (Takara - Clontech) and biotinylated in vitro. HP1α was produced in bacteria with an avitag and a His Tag, and purified using Talon resin.

For HER2, the natural receptor was used as membrane protein target on SKBR3 cells.

For more details see the Appendix for more details.

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