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-Structure paper
Title | A complex structure of arrestin-2 bound to a G protein-coupled receptor. |
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Journal, issue, pages | Cell Res, Vol. 29, Issue 12, Page 971-983, Year 2019 |
Publish date | Nov 27, 2019 |
![]() | Wanchao Yin / Zhihai Li / Mingliang Jin / Yu-Ling Yin / Parker W de Waal / Kuntal Pal / Yanting Yin / Xiang Gao / Yuanzheng He / Jing Gao / Xiaoxi Wang / Yan Zhang / Hu Zhou / Karsten Melcher / Yi Jiang / Yao Cong / X Edward Zhou / Xuekui Yu / H Eric Xu / ![]() ![]() ![]() |
PubMed Abstract | Arrestins comprise a family of signal regulators of G-protein-coupled receptors (GPCRs), which include arrestins 1 to 4. While arrestins 1 and 4 are visual arrestins dedicated to rhodopsin, arrestins ...Arrestins comprise a family of signal regulators of G-protein-coupled receptors (GPCRs), which include arrestins 1 to 4. While arrestins 1 and 4 are visual arrestins dedicated to rhodopsin, arrestins 2 and 3 (Arr2 and Arr3) are β-arrestins known to regulate many nonvisual GPCRs. The dynamic and promiscuous coupling of Arr2 to nonvisual GPCRs has posed technical challenges to tackle the basis of arrestin binding to GPCRs. Here we report the structure of Arr2 in complex with neurotensin receptor 1 (NTSR1), which reveals an overall assembly that is strikingly different from the visual arrestin-rhodopsin complex by a 90° rotation of Arr2 relative to the receptor. In this new configuration, intracellular loop 3 (ICL3) and transmembrane helix 6 (TM6) of the receptor are oriented toward the N-terminal domain of the arrestin, making it possible for GPCRs that lack the C-terminal tail to couple Arr2 through their ICL3. Molecular dynamics simulation and crosslinking data further support the assembly of the Arr2‒NTSR1 complex. Sequence analysis and homology modeling suggest that the Arr2‒NTSR1 complex structure may provide an alternative template for modeling arrestin-GPCR interactions. |
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Methods | EM (single particle) |
Resolution | 4.9 Å |
Structure data | EMDB-20505, PDB-6pwc: |
Source |
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