PCDH8 (Protocadherin 8): PCDH8 is a gene that encodes a protein belonging to the protocadherin family, which are cell adhesion molecules crucial for forming and maintaining neural networks. It plays a vital role in synaptic plasticity, which is important for learning and memory. Dysregulation of PCDH8 has been associated with neurodevelopmental disorders and is also under study for its potential role in tumour suppression due to its function in cell-to-cell communication and nervous system signalling.