Regulation of CB1 cannabinoid receptor internalization by a promiscuous phosphorylation-dependent mechanism
Agonists stimulate CB1 receptor internalization. Previous work suggests that the extreme carboxy-terminus of the receptor regulates this internalization – likely through the phosphorylation of serines and threonines clustered within this region. While truncation of the carboxy-terminus (V460Z CB1) and consequent removal of these putative phosphorylation sites prevents endocytosis in AtT20 cells, the residues necessary for CB1 receptor internalization remain elusive.
