+検索条件
-Structure paper
タイトル | Autoantibody mimicry of hormone action at the thyrotropin receptor. |
---|---|
ジャーナル・号・ページ | Nature, Vol. 609, Issue 7928, Page 846-853, Year 2022 |
掲載日 | 2022年8月8日 |
著者 | Bryan Faust / Christian B Billesbølle / Carl-Mikael Suomivuori / Isha Singh / Kaihua Zhang / Nicholas Hoppe / Antonio F M Pinto / Jolene K Diedrich / Yagmur Muftuoglu / Mariusz W Szkudlinski / Alan Saghatelian / Ron O Dror / Yifan Cheng / Aashish Manglik / |
PubMed 要旨 | Thyroid hormones are vital in metabolism, growth and development. Thyroid hormone synthesis is controlled by thyrotropin (TSH), which acts at the thyrotropin receptor (TSHR). In patients with Graves' ...Thyroid hormones are vital in metabolism, growth and development. Thyroid hormone synthesis is controlled by thyrotropin (TSH), which acts at the thyrotropin receptor (TSHR). In patients with Graves' disease, autoantibodies that activate the TSHR pathologically increase thyroid hormone activity. How autoantibodies mimic thyrotropin function remains unclear. Here we determined cryo-electron microscopy structures of active and inactive TSHR. In inactive TSHR, the extracellular domain lies close to the membrane bilayer. Thyrotropin selects an upright orientation of the extracellular domain owing to steric clashes between a conserved hormone glycan and the membrane bilayer. An activating autoantibody from a patient with Graves' disease selects a similar upright orientation of the extracellular domain. Reorientation of the extracellular domain transduces a conformational change in the seven-transmembrane-segment domain via a conserved hinge domain, a tethered peptide agonist and a phospholipid that binds within the seven-transmembrane-segment domain. Rotation of the TSHR extracellular domain relative to the membrane bilayer is sufficient for receptor activation, revealing a shared mechanism for other glycoprotein hormone receptors that may also extend to other G-protein-coupled receptors with large extracellular domains. |
リンク | Nature / PubMed:35940205 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.4 - 6.65 Å |
構造データ | EMDB-25758, PDB-7t9i: EMDB-25762, PDB-7t9m: EMDB-25763, PDB-7t9n: EMDB-26795, PDB-7utz: EMDB-27640: Org 2274179-0-bound Thyrotropin Receptor EMDB-27647: Human thyrotropin analog TR1402 bound to human Thyrotropin receptor (extracellular domain map only) EMDB-27648: Human thyrotropin analog TR1402 bound to human Thyrotropin receptor (transmembrane domain and G protein map only) EMDB-27649: Native human TSH bound to human Thyrotropin receptor (extracellular domain map only) EMDB-27650: Native human TSH bound to human Thyrotropin receptor (transmembrane domain and G protein map only) EMDB-27651: M22 Fab bound to human Thyrotropin receptor (extracellular domain map only) EMDB-27652: M22 Fab bound to human Thyrotropin receptor (transmembrane domain and G protein map only) |
化合物 | ChemComp-NAG: ChemComp-Z41: |
由来 |
|
キーワード | MEMBRANE PROTEIN / G protein-coupled receptor / Thyroid-stimulating hormone receptor / Thyrotropin receptor / TSH / Thyroid / CS-17 Fab / M22 / autoantibody |