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- PDB-8g04: Structure of signaling thrombopoietin-MPL receptor complex -

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Basic information

Entry
Database: PDB / ID: 8g04
TitleStructure of signaling thrombopoietin-MPL receptor complex
Components
  • Thrombopoietin receptor
  • Thrombopoietin
KeywordsCYTOKINE / TPO / TpoR / receptor / signaling / haematology
Function / homology
Function and homology information


thrombopoietin receptor activity / basophil homeostasis / monocyte homeostasis / thrombopoietin-mediated signaling pathway / positive regulation of hematopoietic stem cell proliferation / cell surface receptor signaling pathway via STAT / megakaryocyte differentiation / positive regulation of megakaryocyte differentiation / positive regulation of lymphocyte proliferation / positive regulation of platelet formation ...thrombopoietin receptor activity / basophil homeostasis / monocyte homeostasis / thrombopoietin-mediated signaling pathway / positive regulation of hematopoietic stem cell proliferation / cell surface receptor signaling pathway via STAT / megakaryocyte differentiation / positive regulation of megakaryocyte differentiation / positive regulation of lymphocyte proliferation / positive regulation of platelet formation / eosinophil homeostasis / neutrophil homeostasis / megakaryocyte development / Platelet Aggregation (Plug Formation) / immunoglobulin mediated immune response / cytokine activity / growth factor activity / hormone activity / platelet aggregation / cellular response to hypoxia / nuclear membrane / cell population proliferation / positive regulation of MAPK cascade / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / positive regulation of ERK1 and ERK2 cascade / neuron projection / positive regulation of protein phosphorylation / external side of plasma membrane / signaling receptor binding / neuronal cell body / positive regulation of cell population proliferation / Golgi apparatus / cell surface / extracellular space / extracellular region / plasma membrane
Similarity search - Function
Thrombopoietin / Erythropoietin/thrombopoietin / Erythropoietin/thrombopoeitin, conserved site / Erythropoietin/thrombopoietin / Erythropoietin / thrombopoeitin signature. / Long hematopoietin receptor, single chain, conserved site / Long hematopoietin receptor, single chain family signature. / Growth hormone/erythropoietin receptor, ligand binding / Erythropoietin receptor, ligand binding / Four-helical cytokine-like, core ...Thrombopoietin / Erythropoietin/thrombopoietin / Erythropoietin/thrombopoeitin, conserved site / Erythropoietin/thrombopoietin / Erythropoietin / thrombopoeitin signature. / Long hematopoietin receptor, single chain, conserved site / Long hematopoietin receptor, single chain family signature. / Growth hormone/erythropoietin receptor, ligand binding / Erythropoietin receptor, ligand binding / Four-helical cytokine-like, core / Fibronectin type III domain / Fibronectin type 3 domain / Fibronectin type-III domain profile. / Fibronectin type III / Fibronectin type III superfamily / Immunoglobulin-like fold
Similarity search - Domain/homology
alpha-D-mannopyranose / Thrombopoietin / Thrombopoietin receptor
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsTsutsumi, N. / Jude, K.M. / Gati, C. / Garcia, K.C.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R37AI051321 United States
Howard Hughes Medical Institute (HHMI) United States
Ludwig Institute for Cancer Research (LICR) United States
CitationJournal: Cell / Year: 2023
Title: Structure of the thrombopoietin-MPL receptor complex is a blueprint for biasing hematopoiesis.
Authors: Naotaka Tsutsumi / Zahra Masoumi / Sophie C James / Julie A Tucker / Hauke Winkelmann / William Grey / Lora K Picton / Lucie Moss / Steven C Wilson / Nathanael A Caveney / Kevin M Jude / ...Authors: Naotaka Tsutsumi / Zahra Masoumi / Sophie C James / Julie A Tucker / Hauke Winkelmann / William Grey / Lora K Picton / Lucie Moss / Steven C Wilson / Nathanael A Caveney / Kevin M Jude / Cornelius Gati / Jacob Piehler / Ian S Hitchcock / K Christopher Garcia /
Abstract: Thrombopoietin (THPO or TPO) is an essential cytokine for hematopoietic stem cell (HSC) maintenance and megakaryocyte differentiation. Here, we report the 3.4 Å resolution cryoelectron microscopy ...Thrombopoietin (THPO or TPO) is an essential cytokine for hematopoietic stem cell (HSC) maintenance and megakaryocyte differentiation. Here, we report the 3.4 Å resolution cryoelectron microscopy structure of the extracellular TPO-TPO receptor (TpoR or MPL) signaling complex, revealing the basis for homodimeric MPL activation and providing a structural rationalization for genetic loss-of-function thrombocytopenia mutations. The structure guided the engineering of TPO variants (TPO) with a spectrum of signaling activities, from neutral antagonists to partial- and super-agonists. Partial agonist TPO decoupled JAK/STAT from ERK/AKT/CREB activation, driving a bias for megakaryopoiesis and platelet production without causing significant HSC expansion in mice and showing superior maintenance of human HSCs in vitro. These data demonstrate the functional uncoupling of the two primary roles of TPO, highlighting the potential utility of TPO in hematology research and clinical HSC transplantation.
History
DepositionJan 31, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 30, 2023Provider: repository / Type: Initial release
Revision 1.1May 8, 2024Group: Database references / Refinement description / Category: citation / em_3d_fitting_list
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _em_3d_fitting_list.initial_refinement_model_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Thrombopoietin
B: Thrombopoietin receptor
C: Thrombopoietin receptor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)163,77615
Polymers161,3683
Non-polymers2,40812
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Thrombopoietin / / C-mpl ligand / ML / Megakaryocyte colony-stimulating factor / Megakaryocyte growth and development ...C-mpl ligand / ML / Megakaryocyte colony-stimulating factor / Megakaryocyte growth and development factor / MGDF / Myeloproliferative leukemia virus oncogene ligand


Mass: 18381.322 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: THPO, MGDF / Production host: Homo sapiens (human) / References: UniProt: P40225
#2: Protein Thrombopoietin receptor / / TPO-R / Myeloproliferative leukemia protein / Proto-oncogene c-Mpl


Mass: 71493.445 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: MPL, TPOR / Production host: Homo sapiens (human) / References: UniProt: P40238
#3: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
#4: Sugar
ChemComp-MAN / alpha-D-mannopyranose / alpha-D-mannose / D-mannose / mannose / Mannose


Type: D-saccharide, alpha linking / Mass: 180.156 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C6H12O6
IdentifierTypeProgram
DManpaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
a-D-mannopyranoseCOMMON NAMEGMML 1.0
a-D-ManpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
ManSNFG CARBOHYDRATE SYMBOLGMML 1.0
Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Thrombopoietin signaling complex with two thrombopoietin receptor chains
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.16 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.2
Buffer component
IDConc.NameBuffer-ID
110 mMHEPES-Na1
2150 mMSodium chloride1
30.001 % (w/v)LMNG1
40.05 % (w/v)Digitonin1
SpecimenConc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: LEICA EM GP / Cryogen name: ETHANE / Humidity: 90 % / Chamber temperature: 281 K / Details: 3s blotting

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 81000 X / Calibrated magnification: 46382 X / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 10494
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
2SerialEMimage acquisition
4cryoSPARCCTF correction
7PHENIXmodel fitting
9cryoSPARCinitial Euler assignment
10cryoSPARCfinal Euler assignment
11cryoSPARCclassification
12cryoSPARC3D reconstruction
13PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 9537683
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 329658 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingPDB-ID: 1V7N

1v7n


Accession code: 1V7N / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0027524
ELECTRON MICROSCOPYf_angle_d0.59210291
ELECTRON MICROSCOPYf_dihedral_angle_d11.1592653
ELECTRON MICROSCOPYf_chiral_restr0.0361167
ELECTRON MICROSCOPYf_plane_restr0.0041306

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