SHC1 (SHC Adaptor Protein 1): SHC1 is a protein that plays a key role in cellular signaling by acting as an adaptor in pathways regulating cell growth, differentiation, and survival. It mediates the activation of the Ras/MAPK signaling pathway, influencing how cells respond to growth factors and cytokines. Dysregulation of SHC1 has been linked to the development of various cancers and cardiovascular diseases, underscoring its important role in cell signaling and disease progression.