SORCS3 (Sortilin-Related VPS10 Domain Containing Receptor 3) is a protein that belongs to the VPS10 domain-containing receptor family, involved in protein trafficking and sorting within cells. It plays a key role in the nervous system by regulating the movement of proteins important for synaptic function. Changes in SORCS3 activity have been associated with neurological conditions such as Alzheimer's disease and schizophrenia.