AP2A2 (Adaptor-Related Protein Complex 2 Alpha 2 Subunit) is a key component of the AP-2 adaptor complex, which plays an essential role in clathrin-mediated endocytosis. This process is crucial for the internalisation of receptors and proteins into cells, affecting cell signalling and nutrient absorption. Dysregulation of AP2A2 can impact neuronal development and synaptic function, with possible links to neurological disorders.