SHC1 (SHC Adaptor Protein 1): SHC1 is a protein that plays a crucial role in cellular signalling by functioning as an adaptor in pathways that regulate cell growth, differentiation, and survival. It facilitates the activation of the Ras/MAPK signalling pathway, impacting how cells respond to growth factors and cytokines. Dysregulation of SHC1 has been associated with the development of various cancers and cardiovascular diseases, highlighting its significant role in cell signalling and disease progression.