Cells (Nov 2020)

Targeting the Interaction between the SH3 Domain of Grb2 and Gab2

  • Francesca Malagrinò,
  • Antonio Coluccia,
  • Marianna Bufano,
  • Giuseppe La Regina,
  • Michela Puxeddu,
  • Angelo Toto,
  • Lorenzo Visconti,
  • Alessio Paone,
  • Maria Chiara Magnifico,
  • Francesca Troilo,
  • Francesca Cutruzzolà,
  • Romano Silvestri,
  • Stefano Gianni

DOI
https://doi.org/10.3390/cells9112435
Journal volume & issue
Vol. 9, no. 11
p. 2435

Abstract

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Gab2 is a scaffolding protein, overexpressed in many types of cancers, that plays a key role in the formation of signaling complexes involved in cellular proliferation, migration, and differentiation. The interaction between Gab2 and the C-terminal SH3 domain of the protein Grb2 is crucial for the activation of the proliferation-signaling pathway Ras/Erk, thus representing a potential pharmacological target. In this study, we identified, by virtual screening, seven potential inhibitor molecules that were experimentally tested through kinetic and equilibrium binding experiments. One compound showed a remarkable effect in lowering the affinity of the C-SH3 domain for Gab2. This inhibitory effect was subsequently validated in cellula by using lung cancer cell lines A549 and H1299. Our results are discussed under the light of previous works on the C-SH3:Gab2 interaction.

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