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TitleHormone- and antibody-mediated activation of the thyrotropin receptor.
Journal, issue, pagesNature, Vol. 609, Issue 7928, Page 854-859, Year 2022
Publish dateAug 8, 2022
AuthorsJia Duan / Peiyu Xu / Xiaodong Luan / Yujie Ji / Xinheng He / Ning Song / Qingning Yuan / Ye Jin / Xi Cheng / Hualiang Jiang / Jie Zheng / Shuyang Zhang / Yi Jiang / H Eric Xu /
PubMed AbstractThyroid-stimulating hormone (TSH), through activation of its G-protein-coupled thyrotropin receptor (TSHR), controls the synthesis of thyroid hormone-an essential metabolic hormone. Aberrant ...Thyroid-stimulating hormone (TSH), through activation of its G-protein-coupled thyrotropin receptor (TSHR), controls the synthesis of thyroid hormone-an essential metabolic hormone. Aberrant signalling of TSHR by autoantibodies causes Graves' disease (hyperthyroidism) and hypothyroidism, both of which affect millions of patients worldwide. Here we report the active structures of TSHR with TSH and the activating autoantibody M22, both bound to the allosteric agonist ML-109, as well as an inactivated TSHR structure with the inhibitory antibody K1-70. Both TSH and M22 push the extracellular domain (ECD) of TSHR into an upright active conformation. By contrast, K1-70 blocks TSH binding and cannot push the ECD into the upright conformation. Comparisons of the active and inactivated structures of TSHR with those of the luteinizing hormone/choriogonadotropin receptor (LHCGR) reveal a universal activation mechanism of glycoprotein hormone receptors, in which a conserved ten-residue fragment (P10) from the hinge C-terminal loop mediates ECD interactions with the TSHR transmembrane domain. One notable feature is that there are more than 15 cholesterols surrounding TSHR, supporting its preferential location in lipid rafts. These structures also highlight a similar ECD-push mechanism for TSH and autoantibody M22 to activate TSHR, therefore providing the molecular basis for Graves' disease.
External linksNature / PubMed:35940204
MethodsEM (single particle)
Resolution2.78 - 5.5 Å
Structure data

EMDB-33491, PDB-7xw5:
TSHR-thyroid stimulating hormone-Gs-ML109 complex
Method: EM (single particle) / Resolution: 2.96 Å

EMDB-33492, PDB-7xw6:
TSHR-Gs-M22 antibody-ML109 complex
Method: EM (single particle) / Resolution: 2.78 Å

EMDB-33493, PDB-7xw7:
TSHR-K1-70 complex
Method: EM (single particle) / Resolution: 5.5 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine

ChemComp-HOI:
~{N}-[4-[[2-methoxy-5-[(2~{S})-5-oxidanyl-4-oxidanylidene-3-(phenylmethyl)-1,2-dihydroquinazolin-2-yl]phenyl]methoxy]phenyl]ethanamide

ChemComp-CLR:
CHOLESTEROL / Cholesterol

ChemComp-PLM:
PALMITIC ACID / Palmitic acid

Source
  • Homo (humans)
  • homo sapiens (human)
  • lama glama (llama)
  • mus musculus (house mouse)
KeywordsMEMBRANE PROTEIN / thyroid-stimulating hormone / thyroid-stimulating hormone receptor / THS / THSR / GPCR / Gs / ML-109 / M22 / scFv / k1-70

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