CASS4 (Cas Scaffolding Protein Family Member 4): CASS4 is part of the CAS family of scaffolding proteins, involved in integrin signalling and cell migration. It plays a key role in the dynamic reorganisation of the cytoskeleton, facilitating cell movement and invasion. CASS4's participation in signalling pathways related to cell migration and its connection with the extracellular matrix make it significant in cancer metastasis and immune cell function, emphasising its role in cellular dynamics and disease progression.