Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5510841 | Current Opinion in Structural Biology | 2017 | 10 Pages |
â¢Recent crystal structures indicate how arrestin is activated for GPCR binding.â¢Multiple binding sites for phosphorylated receptor C-terminus exist on arrestin.â¢Interdomain rotation and finger loop flexibility allow arrestin binding to receptor.â¢Arrestin and G protein share common binding crevice on the receptor.â¢Arrestin C-edge functions as membrane anchor.
The large and multifunctional family of G protein-coupled receptors (GPCRs) are regulated by a small family of structurally conserved arrestin proteins. In order to bind an active GPCR, arrestin must first be activated by interaction with the phosphorylated receptor C-terminus. Recent years have witnessed major developments in high-resolution crystal structures of pre-active arrestins and arrestin or arrestin-derived peptides in complex with an active GPCR. Although each structure individually offers only a limited snapshot, taken together and interpreted in light of recent complementary functional data, they offer valuable insight into how arrestin is activated by and couples to a phosphorylated active GPCR.