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- EMDB-44229: Cryo-EM structure of the LAPTH-bound PTH1R in complex with Gq -

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Entry
Database: EMDB / ID: EMD-44229
TitleCryo-EM structure of the LAPTH-bound PTH1R in complex with Gq
Map dataLAPTH-PTH1R-Gq_map_half_B
Sample
  • Complex: LAPTH-PTH1R-Gq complex
    • Protein or peptide: Parathyroid hormone/parathyroid hormone-related peptide receptor
    • Protein or peptide: Guanine nucleotide-binding protein G(q)
    • Protein or peptide: Long-acting parathyroid hormone analog
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: scFv16
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
KeywordsGPCR / PTH1R / Membrane protein / SIGNALING PROTEIN
Function / homology
Function and homology information


Olfactory Signaling Pathway / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Prostacyclin signalling through prostacyclin receptor ...Olfactory Signaling Pathway / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / photoreceptor disc membrane / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / GTPase binding / Ca2+ pathway / fibroblast proliferation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytoplasm / cytosol
Similarity search - Function
G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit ...G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Similarity search - Component
Biological speciesSpodoptera frugiperda (fall armyworm) / Homo sapiens (human) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.49 Å
AuthorsZhang X / Liu H / Zhang C / Vilardaga J-P
Funding support United States, 3 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)R01DK116780 United States
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)R01DK122259 United States
National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)R21DE032478 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2025
Title: Allosteric mechanism in the distinctive coupling of G and G to the parathyroid hormone type 1 receptor.
Authors: Xuan Zhang / Ji Young Lee / Jonathan Pacheco / Ieva Sutkeviciute / Anju Krishnan Anitha / Heng Liu / Stephanie Singh / Carlos Ventura / Sofya Savransky / Ashok Khatri / Cheng Zhang / Ivet ...Authors: Xuan Zhang / Ji Young Lee / Jonathan Pacheco / Ieva Sutkeviciute / Anju Krishnan Anitha / Heng Liu / Stephanie Singh / Carlos Ventura / Sofya Savransky / Ashok Khatri / Cheng Zhang / Ivet Bahar / Jean-Pierre Vilardaga /
Abstract: The mechanism determining the preferential stimulation of one heterotrimeric G protein signaling pathway over another by a ligand remains undetermined. By reporting the cryogenic electron microscopy ...The mechanism determining the preferential stimulation of one heterotrimeric G protein signaling pathway over another by a ligand remains undetermined. By reporting the cryogenic electron microscopy (cryo-EM) structure of the parathyroid hormone (PTH) type 1 receptor (PTH1R) complexed with Gq and comparing its allosteric dynamics with that of PTH1R in complex with G, we uncover a mechanism underlying such preferences. We show that an allosteric coupling between the ligand PTH and the C-terminal helix α5 of the Gα subunit controls the stability of the PTH1R complex with the specific G protein, G or G. Single-cell-level experiments further validate the G protein-selective effects of the PTH binding pose by demonstrating the differential, G protein-dependent residence times and affinity of this ligand at the PTH1R binding site. The findings deepen our understanding of the selective coupling of PTH1R to G or G and how it relates to the stability and kinetics of ligand binding. They explain the observed variability in the ligand-binding affinity of a GPCR when coupled to different G proteins.
History
DepositionMar 22, 2024-
Header (metadata) releaseMar 19, 2025-
Map releaseMar 19, 2025-
UpdateJun 4, 2025-
Current statusJun 4, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_44229.png

Downloads & links

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Map

FileDownload / File: emd_44229.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationLAPTH-PTH1R-Gq_map_half_B
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 320 pix.
= 264.96 Å		0.83 Å/pix.
x 320 pix.
= 264.96 Å		0.83 Å/pix.
x 320 pix.
= 264.96 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.828 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.12
Minimum - Maximum-0.025073921 - 2.1406248
Average (Standard dev.)0.00088467775 (±0.019717043)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 264.96 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: LAPTH-PTH1R-Gq map half B

Fileemd_44229_half_map_1.map
AnnotationLAPTH-PTH1R-Gq_map_half_B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: LAPTH-PTH1R-Gq map half A

Fileemd_44229_half_map_2.map
AnnotationLAPTH-PTH1R-Gq_map_half_A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : LAPTH-PTH1R-Gq complex

EntireName: LAPTH-PTH1R-Gq complex
Components
  • Complex: LAPTH-PTH1R-Gq complex
    • Protein or peptide: Parathyroid hormone/parathyroid hormone-related peptide receptor
    • Protein or peptide: Guanine nucleotide-binding protein G(q)
    • Protein or peptide: Long-acting parathyroid hormone analog
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: scFv16
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Supramolecule #1: LAPTH-PTH1R-Gq complex

SupramoleculeName: LAPTH-PTH1R-Gq complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Spodoptera frugiperda (fall armyworm)

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Macromolecule #1: Parathyroid hormone/parathyroid hormone-related peptide receptor

MacromoleculeName: Parathyroid hormone/parathyroid hormone-related peptide receptor
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 78.275008 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DYKDDDDGQP GNGSAFLLAP NGSHAPDHNV TQQRDEENLY FQGVDGGSGG SGGDADDVMT KEEQIFLLHR AQAQCEKRLK EVLQRPASI MESDKGWTSA STSGKPRKDK ASGKLYPESE EDKEAPTGSR YRGRPCLPEW DHILCWPLGA PGEVVAVPCP D YIYDFNHK ...String:
DYKDDDDGQP GNGSAFLLAP NGSHAPDHNV TQQRDEENLY FQGVDGGSGG SGGDADDVMT KEEQIFLLHR AQAQCEKRLK EVLQRPASI MESDKGWTSA STSGKPRKDK ASGKLYPESE EDKEAPTGSR YRGRPCLPEW DHILCWPLGA PGEVVAVPCP D YIYDFNHK GHAYRRCDRN GSWELVPGHN RTWANYSECV KFLTNETRER EVFDRLGMIY TVGYSVSLAS LTVAVLILAY FR RLHCTRN YIHMHLFLSF MLRAVSIFVK DAVLYSGATL DEAERLTEEE LRAIAQAPPP PATAAAGYAG CRVAVTFFLY FLA TNYYWI LVEGLYLHSL IFMAFFSEKK YLWGFTVFGW GLPAVFVAVW VSVRATLANT GCWDLSSGNK KWIIQVPILA SIVL NFILF INIVRVLATK LRETNAGRCD TRQQYRKLLK STLVLMPLFG VHYIVFMATP YTEVSGTLWQ VQMHYEMLFN SFQGF FVAI IYCFCNGEVQ AEIKKSWSRW TLALDFKRKA RSGSSSYSYG AAAVFTLEDF VGDWEQTAAY NLDQVLEQGG VSSLLQ NLA VSVTPIQRIV RSGENALKID IHVIIPYEGL SADQMAQIEE VFKVVYPVDD HHFKVILPYG TLVIDGVTPN MLNYFGR PY EGIAVFDGKK ITVTGTLWNG NKIIDERLIT PDGSMLFRVT INSHHHHHHH H

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Macromolecule #2: Guanine nucleotide-binding protein G(q)

MacromoleculeName: Guanine nucleotide-binding protein G(q) / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 41.238883 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA RRELKLLLLG TGESGKSTFI KQMRIIHGSG YSDEDKRGFT KLVYQNIFTA MQAMIRAMD TLKIPYKYEH NKAHAQLVRE VDVEKVSAFE NPYVDAIKSL WNDPGIQECY DRRREYQLSD STKYYLNDLD R VADPAYLP ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA RRELKLLLLG TGESGKSTFI KQMRIIHGSG YSDEDKRGFT KLVYQNIFTA MQAMIRAMD TLKIPYKYEH NKAHAQLVRE VDVEKVSAFE NPYVDAIKSL WNDPGIQECY DRRREYQLSD STKYYLNDLD R VADPAYLP TQQDVLRVRV PTTGIIEYPF DLQSVIFRMV DVGGQRSERR KWIHCFENVT SIMFLVALSE YDQVLVESDN EN RMEESKA LFRTIITYPW FQNSSVILFL NKKDLLEEKI MYSHLVDYFP EYDGPQRDAQ AAREFILKMF VDLNPDSDKI IYS HFTCAT DTENIRFVFA AVKDTILQLN LKEYNLV

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Macromolecule #3: Long-acting parathyroid hormone analog

MacromoleculeName: Long-acting parathyroid hormone analog / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 4.274027 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
AVAEIQLMHQ RAKWIQDARR RAFLHKLIAE IHTAEI

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Macromolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 38.744371 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI ...String:
MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI VTSSGDTTCA LWDIETGQQT TTFTGHTGDV MSLSLAPDTR LFVSGACDAS AKLWDVREGM CRQTFTGHES DI NAICFFP NGNAFATGSD DATCRLFDLR ADQELMTYSH DNIICGITSV SFSKSGRLLL AGYDDFNCNV WDALKADRAG VLA GHDNRV SCLGVTDDGM AVATGSWDSF LKIWN

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

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Macromolecule #5: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 28.634797 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS AGGGGSGGGG SGGGGSADIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...String:
VQLVESGGGL VQPGGSRKLS CSASGFAFSS FGMHWVRQAP EKGLEWVAYI SSGSGTIYYA DTVKGRFTIS RDDPKNTLFL QMTSLRSED TAMYYCVRSI YYYGSSPFDF WGQGTTLTVS AGGGGSGGGG SGGGGSADIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL LEENLYFQGA SHHHHHHHH

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Macromolecule #6: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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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

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 55.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.49 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 129318
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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