Download MendeleyStructural studies of phosphorylation-dependent interactions between the V2R receptor and arrestin-2.
He, Q.T., Xiao, P., Huang, S.M., Jia, Y.L., Zhu, Z.L., Lin, J.Y., Yang, F., Tao, X.N., Zhao, R.J., Gao, F.Y., Niu, X.G., Xiao, K.H., Wang, J., Jin, C., Sun, J.P., Yu, X.(2021) Nat Commun 12: 2396-2396
- PubMed: 33888704
- DOI: https://doi.org/10.1038/s41467-021-22731-x
- Primary Citation of Related Structures:
7DF9, 7DFA, 7DFB, 7DFC - PubMed Abstract:
Arrestins recognize different receptor phosphorylation patterns and convert this information to selective arrestin functions to expand the functional diversity of the G protein-coupled receptor (GPCR) superfamilies. However, the principles governing arrestin-phospho-receptor interactions, as well as the contribution of each single phospho-interaction to selective arrestin structural and functional states, are undefined. Here, we determined the crystal structures of arrestin2 in complex with four different phosphopeptides derived from the vasopressin receptor-2 (V2R) C-tail. A comparison of these four crystal structures with previously solved Arrestin2 structures demonstrated that a single phospho-interaction change results in measurable conformational changes at remote sites in the complex. This conformational bias introduced by specific phosphorylation patterns was further inspected by FRET and 1 H NMR spectrum analysis facilitated via genetic code expansion. Moreover, an interdependent phospho-binding mechanism of phospho-receptor-arrestin interactions between different phospho-interaction sites was unexpectedly revealed. Taken together, our results provide evidence showing that phospho-interaction changes at different arrestin sites can elicit changes in affinity and structural states at remote sites, which correlate with selective arrestin functions.
Organizational Affiliation:
Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo college of Medicine, Shandong University, Jinan, Shandong, China.
