NCK adaptor protein 2 (NCK2)

NCK adaptor protein 2 (NCK2) is a widely expressed cytoplasmic adaptor protein characterized by three N-terminal SH3 domains and one C-terminal SH2 domain[1][2]. NCK2 functions as a critical linker between activated growth factor receptors (such as EGF receptor, PDGF receptor-β), integrin signaling pathways, and the actin cytoskeleton, mediating signal transduction that influences cell migration, proliferation, differentiation, and vascular development[1][2]. NCK2 achieves this scaffolding role by binding phosphotyrosine motifs via its SH2 domain and proline-rich sequences via its SH3 domains, regulating protein assemblies required for actin remodeling and cellular phenotype changes[2][3]. While NCK2 shares functional redundancy with NCK1, it also exhibits isoform-specific interactions, including interaction with PINCH, important in integrin signaling[1][2]. NCK2 has been implicated in the progression of cancer and cardiovascular diseases due to its central role in cytoskeletal dynamics and cell signaling, though no drugs directly target it in clinical settings[2].

Other names

Growth factor receptor-bound protein 4GRB4Nck-2NCKbetaSH2/SH3 adaptor protein NCK-betaCytoplasmic protein NCK2

Inhibition or disruption of protein-protein interactions required for downstream signaling (as explored in research, not clinical practice)