AP2A2 (Adaptor-Related Protein Complex 2 Alpha 2 Subunit) is a crucial component of the AP-2 adaptor complex, which plays an essential role in clathrin-mediated endocytosis. This process is vital for the internalization of receptors and proteins into cells, affecting cell signaling and nutrient uptake. Dysregulation of AP2A2 can impair neuronal development and synaptic function, potentially contributing to neurological disorders.