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- EMDB-27648: Human thyrotropin analog TR1402 bound to human Thyrotropin recept... -

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Basic information

Entry
Database: EMDB / ID: EMD-27648
TitleHuman thyrotropin analog TR1402 bound to human Thyrotropin receptor (transmembrane domain and G protein map only)
Map data
Sample
  • Complex: Human TSH analog TR1402 bound to human Thyrotropin receptor in complex with miniGs399 (composite structure)
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.4 Å
AuthorsFaust B / Cheng Y / Manglik A
Funding support United States, 2 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Cancer Institute (NIH/NCI) United States
CitationJournal: Nature / Year: 2022
Title: Autoantibody mimicry of hormone action at the thyrotropin receptor.
Authors: 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 ...Authors: 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 /
Abstract: 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.
History
DepositionJul 18, 2022-
Header (metadata) releaseAug 24, 2022-
Map releaseAug 24, 2022-
UpdateOct 5, 2022-
Current statusOct 5, 2022Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_27648.png

Downloads & links

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Map

FileDownload / File: emd_27648.map.gz / Format: CCP4 / Size: 274.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.831 Å
Density
Contour LevelBy AUTHOR: 0.396
Minimum - Maximum-0.80666226 - 1.7662307
Average (Standard dev.)-0.001279497 (±0.032547895)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions416416416
Spacing416416416
CellA=B=C: 345.69598 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_27648_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_27648_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_27648_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Human TSH analog TR1402 bound to human Thyrotropin receptor in co...

EntireName: Human TSH analog TR1402 bound to human Thyrotropin receptor in complex with miniGs399 (composite structure)
Components
  • Complex: Human TSH analog TR1402 bound to human Thyrotropin receptor in complex with miniGs399 (composite structure)

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Supramolecule #1: Human TSH analog TR1402 bound to human Thyrotropin receptor in co...

SupramoleculeName: Human TSH analog TR1402 bound to human Thyrotropin receptor in complex with miniGs399 (composite structure)
type: complex / Chimera: Yes / ID: 1 / Parent: 0 / Macromolecule list: #1-#7
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Homo sapiens (human) / Recombinant strain: expi293

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 105000
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: cryoSPARC
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 259702

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