Petschnigg, J; Ketteler, R; (2017) GFP-Grb2 Translocation Assay Using High-content Imaging to Screen for Modulators of EGFR-signaling. Bio Protocol , 7 (17) , Article e2528. 10.21769/BioProtoc.2528.

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Abstract

High-content screening is a useful tool to understand complex cellular processes and to identify genes, proteins or small molecule compounds that modulate such pathways. High-content assays monitor the function of a protein or pathway by visualizing a change in an image-based readout, such as a change in the localization of a reporter protein. Examples of this can be the translocation of a fluorescently tagged protein from the cytoplasm to the nucleus or to the plasma membrane. One protein that is known to undergo such translocation is the Growth Factor Receptor-bound protein 2 (GRB2) that is recruited to the plasma membrane upon stimulation of a growth factor receptor and subsequently undergoes internalization. We have used GFP-tagged Grb2 previously to identify genes that are involved in EGFR signaling (Petschnigg et al., 2017). Ultimately, the assay can be adapted to cDNA expression cloning (Freeman et al., 2012) and can be used in early stage drug discovery to identify compounds that modulate or inhibit EGFR signaling and internalization (Antczak and Djaballah, 2016).

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