Role of POB1 in EGF Receptor Endocytosis
Author Information
Author(s): Tomassi Laura, Costantini Anna, Corallino Salvatore, Santonico Elena, Carducci Martina, Cesareni Gianni, Castagnoli Luisa
Primary Institution: Department of Biology, University of Rome Tor Vergata
Hypothesis
The central proline rich region of POB1/REPS2 plays a regulatory role in epidermal growth factor receptor endocytosis.
Conclusion
The study shows that the proline-rich region of POB1 interferes with EGF receptor endocytosis by binding to 14-3-3 and SH3 domain-containing proteins.
Supporting Evidence
- POB1 is highly expressed in androgen-dependent prostate cancer cell lines.
- Over-expression of the POB1 proline-rich region inhibits EGF endocytosis.
- Mutations in binding motifs of POB1 eliminate its dominant negative effect on receptor endocytosis.
Takeaway
POB1 helps control how cells take in signals from outside, like EGF, and when it doesn't work right, it can mess things up.
Methodology
The study used various methods including phage display, bioinformatics predictions, peptide arrays, mutagenic analysis, and in vivo co-immunoprecipitation.
Digital Object Identifier (DOI)
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