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-Structure paper
タイトル | Structural basis of sphingosine-1-phosphate receptor 1 activation and biased agonism. |
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ジャーナル・号・ページ | Nat Chem Biol, Vol. 18, Issue 3, Page 281-288, Year 2022 |
掲載日 | 2021年12月22日 |
著者 | Zhenmei Xu / Tatsuya Ikuta / Kouki Kawakami / Ryoji Kise / Yu Qian / Ruixue Xia / Ming-Xia Sun / Anqi Zhang / Changyou Guo / Xue-Hui Cai / Zhiwei Huang / Asuka Inoue / Yuanzheng He / |
PubMed 要旨 | Sphingosine-1-phosphate receptor 1 (S1PR1) is a master regulator of lymphocyte egress from the lymph node and an established drug target for multiple sclerosis (MS). Mechanistically, therapeutic ...Sphingosine-1-phosphate receptor 1 (S1PR1) is a master regulator of lymphocyte egress from the lymph node and an established drug target for multiple sclerosis (MS). Mechanistically, therapeutic S1PR1 modulators activate the receptor yet induce sustained internalization through a potent association with β-arrestin. However, a structural basis of biased agonism remains elusive. Here, we report the cryo-electron microscopy (cryo-EM) structures of G-bound S1PR1 in complex with S1P, fingolimod-phosphate (FTY720-P) and siponimod (BAF312). In combination with functional assays and molecular dynamics (MD) studies, we reveal that the β-arrestin-biased ligands direct a distinct activation path in S1PR1 through the extensive interplay between the PIF and the NPxxY motifs. Specifically, the intermediate flipping of W269 and the retained interaction between F265 and N307 are the key features of the β-arrestin bias. We further identify ligand-receptor interactions accounting for the S1PR subtype specificity of BAF312. These structural insights provide a rational basis for designing novel signaling-biased S1PR modulators. |
リンク | Nat Chem Biol / PubMed:34937912 |
手法 | EM (単粒子) |
解像度 | 2.86 - 3.4 Å |
構造データ | EMDB-31225, PDB-7eo2: EMDB-31226, PDB-7eo4: EMDB-32461, PDB-7wf7: |
化合物 | ChemComp-J89: ChemComp-J8C: ChemComp-S1P: |
由来 |
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キーワード | MEMBRANE PROTEIN / GPCR |