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- EMDB-9382: A high-resolution cryo-electron microscopy structure of a calcito... -

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Entry
Database: EMDB / ID: EMD-9382
TitleA high-resolution cryo-electron microscopy structure of a calcitonin receptor-heterotrimeric Gs protein complex
Map dataCalcitonin receptor-heterotrimeric Gs protein complex, Sharpened map (B -80)
Sample
  • Complex: Complex of a full-length, active-state calcitonin receptor with peptide ligand, heterotrimeric Gs protein and nanobody 35
    • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: Nanobody35
    • Protein or peptide: Calcitonin receptor
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Calcitonin
KeywordsGPCR / transmembrane / receptor / calcitonin / MEMBRANE PROTEIN
Function / homology
Function and homology information


calcitonin receptor binding / calcitonin binding / calcitonin family receptor activity / amylin receptor complex 1 / amylin receptor complex 2 / calcitonin family receptor signaling pathway / amylin receptor complex 3 / amylin receptor activity / calcitonin receptor activity / calcitonin gene-related peptide receptor signaling pathway ...calcitonin receptor binding / calcitonin binding / calcitonin family receptor activity / amylin receptor complex 1 / amylin receptor complex 2 / calcitonin family receptor signaling pathway / amylin receptor complex 3 / amylin receptor activity / calcitonin receptor activity / calcitonin gene-related peptide receptor signaling pathway / calcitonin gene-related peptide receptor activity / amylin receptor 3 signaling pathway / amylin receptor 2 signaling pathway / amylin receptor 1 signaling pathway / amylin receptor signaling pathway / Calcitonin-like ligand receptors / negative regulation of ossification / positive regulation of cAMP/PKA signal transduction / response to amyloid-beta / PKA activation in glucagon signalling / hair follicle placode formation / developmental growth / D1 dopamine receptor binding / intracellular transport / renal water homeostasis / Hedgehog 'off' state / response to glucocorticoid / adenylate cyclase-activating adrenergic receptor signaling pathway / activation of adenylate cyclase activity / cellular response to glucagon stimulus / regulation of mRNA stability / adenylate cyclase activator activity / regulation of insulin secretion / positive regulation of calcium-mediated signaling / ossification / osteoclast differentiation / acrosomal vesicle / trans-Golgi network membrane / negative regulation of inflammatory response to antigenic stimulus / bone development / hormone activity / cilium / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / platelet aggregation / Activation of the phototransduction cascade / adenylate cyclase-activating G protein-coupled receptor signaling pathway / cognition / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / 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 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / 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 / sensory perception of smell / cellular response to prostaglandin E stimulus / Inactivation, recovery and regulation of the phototransduction cascade / 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) / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / positive regulation of cold-induced thermogenesis / amyloid-beta binding / G protein activity / GTPase binding / Ca2+ pathway / retina development in camera-type eye / positive regulation of cytosolic calcium ion concentration / fibroblast proliferation / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (i) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / G alpha (s) signalling events / G alpha (q) signalling events / Ras protein signal transduction
Similarity search - Function
Calcitonin / GPCR, family 2, calcitonin receptor / GPCR, family 2, calcitonin receptor family / Calcitonin-like / Calcitonin peptide-like / Calcitonin, conserved site / Calcitonin / CGRP / IAPP family signature. / calcitonin / Calcitonin/adrenomedullin / Calcitonin / CGRP / IAPP family ...Calcitonin / GPCR, family 2, calcitonin receptor / GPCR, family 2, calcitonin receptor family / Calcitonin-like / Calcitonin peptide-like / Calcitonin, conserved site / Calcitonin / CGRP / IAPP family signature. / calcitonin / Calcitonin/adrenomedullin / Calcitonin / CGRP / IAPP family / G-protein coupled receptors family 2 signature 1. / : / GPCR, family 2, extracellular hormone receptor domain / G-protein coupled receptors family 2 profile 1. / Domain present in hormone receptors / Hormone receptor domain / GPCR family 2, extracellular hormone receptor domain superfamily / G-protein coupled receptors family 2 signature 2. / GPCR, family 2, secretin-like, conserved site / GPCR, family 2, secretin-like / 7 transmembrane receptor (Secretin family) / GPCR, family 2-like / G-protein coupled receptors family 2 profile 2. / G-protein alpha subunit, group S / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha 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 / 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. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Calcitonin receptor / 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 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Calcitonin
Similarity search - Component
Biological speciesHomo sapiens (human) / Lama glama (llama) / Oncorhynchus sp. (fish)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.34 Å
Authorsdal Maso E / Glukhova A
Funding support Australia, 4 items
OrganizationGrant numberCountry
National Health and Medical Research Council (NHMRC, Australia)1061044 Australia
National Health and Medical Research Council (NHMRC, Australia)1065410 Australia
National Health and Medical Research Council (NHMRC, Australia)1055134 Australia
National Health and Medical Research Council (NHMRC, Australia)1126857 Australia
CitationJournal: ACS Pharmacol Transl Sci / Year: 2019
Title: The Molecular Control of Calcitonin Receptor Signaling.
Authors: Emma Dal Maso / Alisa Glukhova / Yue Zhu / Javier Garcia-Nafria / Christopher G Tate / Silvia Atanasio / Christopher A Reynolds / Erney Ramírez-Aportela / Jose-Maria Carazo / Caroline A ...Authors: Emma Dal Maso / Alisa Glukhova / Yue Zhu / Javier Garcia-Nafria / Christopher G Tate / Silvia Atanasio / Christopher A Reynolds / Erney Ramírez-Aportela / Jose-Maria Carazo / Caroline A Hick / Sebastian G B Furness / Debbie L Hay / Yi-Lynn Liang / Laurence J Miller / Arthur Christopoulos / Ming-Wei Wang / Denise Wootten / Patrick M Sexton /
Abstract: The calcitonin receptor (CTR) is a class B G protein-coupled receptor (GPCR) that responds to the peptide hormone calcitonin (CT). CTs are clinically approved for the treatment of bone diseases. We ...The calcitonin receptor (CTR) is a class B G protein-coupled receptor (GPCR) that responds to the peptide hormone calcitonin (CT). CTs are clinically approved for the treatment of bone diseases. We previously reported a 4.1 Å structure of the activated CTR bound to salmon CT (sCT) and heterotrimeric Gs protein by cryo-electron microscopy (Liang, Y.-L., . Phase-plate cryo- EM structure of a class B GPCR-G protein complex. , , 118-123). In the current study, we have reprocessed the electron micrographs to yield a 3.3 Å map of the complex. This has allowed us to model extracellular loops (ECLs) 2 and 3, and the peptide N-terminus that previously could not be resolved. We have also performed alanine scanning mutagenesis of ECL1 and the upper segment of transmembrane helix 1 (TM1) and its extension into the receptor extracellular domain (TM1 stalk), with effects on peptide binding and function assessed by cAMP accumulation and ERK1/2 phosphorylation. These data were combined with previously published alanine scanning mutagenesis of ECL2 and ECL3 and the new structural information to provide a comprehensive 3D map of the molecular surface of the CTR that controls binding and signaling of distinct CT and related peptides. The work highlights distinctions in how different, related, class B receptors may be activated. The new mutational data on the TM1 stalk and ECL1 have also provided critical insights into the divergent control of cAMP versus pERK signaling and, collectively with previous mutagenesis data, offer evidence that the conformations linked to these different signaling pathways are, in many ways, mutually exclusive. This study furthers our understanding of the complex nature of signaling elicited by GPCRs and, in particular, that of the therapeutically important class B subfamily.
History
DepositionJan 2, 2019-
Header (metadata) releaseJan 23, 2019-
Map releaseJan 23, 2019-
UpdateOct 9, 2024-
Current statusOct 9, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.015
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  • Surface view with fitted model
  • Atomic models: PDB-6niy
  • Surface level: 0.015
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_9382.png

Downloads & links

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Map

FileDownload / File: emd_9382.map.gz / Format: CCP4 / Size: 22.2 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCalcitonin receptor-heterotrimeric Gs protein complex, Sharpened map (B -80)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 180 pix.
= 190.8 Å		1.06 Å/pix.
x 180 pix.
= 190.8 Å		1.06 Å/pix.
x 180 pix.
= 190.8 Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.06 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.015 / Movie #1: 0.015
Minimum - Maximum-0.049256623 - 0.091105305
Average (Standard dev.)0.00024497448 (±0.0029341842)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions180180180
Spacing180180180
CellA=B=C: 190.79999 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.061.061.06
M x/y/z180180180
origin x/y/z0.0000.0000.000
length x/y/z190.800190.800190.800
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS180180180
D min/max/mean-0.0490.0910.000

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Supplemental data

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Mask #1

Fileemd_9382_msk_1.map
Projections & Slices
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Additional map: Calcitonin receptor-heterotrimeric Gs protein complex, LocalDeblur sharpened map...

Fileemd_9382_additional_1.map
AnnotationCalcitonin receptor-heterotrimeric Gs protein complex, LocalDeblur sharpened map
Projections & Slices
AxesZYX

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Additional map: Calcitonin receptor-heterotrimeric Gs protein complex, unsharpened map...

Fileemd_9382_additional_2.map
AnnotationCalcitonin receptor-heterotrimeric Gs protein complex, unsharpened map
Projections & Slices
AxesZYX

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Half map: Calcitonin receptor-heterotrimeric Gs protein complex, final half map...

Fileemd_9382_half_map_1.map
AnnotationCalcitonin receptor-heterotrimeric Gs protein complex, final half map 1
Projections & Slices
AxesZYX

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Histogram

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Half map: Calcitonin receptor-heterotrimeric Gs protein complex, final half map...

Fileemd_9382_half_map_2.map
AnnotationCalcitonin receptor-heterotrimeric Gs protein complex, final half map 2
Projections & Slices
AxesZYX

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Sample components

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Entire : Complex of a full-length, active-state calcitonin receptor with p...

EntireName: Complex of a full-length, active-state calcitonin receptor with peptide ligand, heterotrimeric Gs protein and nanobody 35
Components
  • Complex: Complex of a full-length, active-state calcitonin receptor with peptide ligand, heterotrimeric Gs protein and nanobody 35
    • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: Nanobody35
    • Protein or peptide: Calcitonin receptor
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Calcitonin

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Supramolecule #1: Complex of a full-length, active-state calcitonin receptor with p...

SupramoleculeName: Complex of a full-length, active-state calcitonin receptor with peptide ligand, heterotrimeric Gs protein and nanobody 35
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 150 KDa

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Macromolecule #1: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

MacromoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 45.72552 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MGCLGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGAGE SGKSTIVKQM RILHVNGFNG EGGEEDPQAA RSNSDGEKA TKVQDIKNNL KEAIETIVAA MSNLVPPVEL ANPENQFRVD YILSVMNVPD FDFPPEFYEH AKALWEDEGV R ACYERSNE ...String:
MGCLGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGAGE SGKSTIVKQM RILHVNGFNG EGGEEDPQAA RSNSDGEKA TKVQDIKNNL KEAIETIVAA MSNLVPPVEL ANPENQFRVD YILSVMNVPD FDFPPEFYEH AKALWEDEGV R ACYERSNE YQLIDCAQYF LDKIDVIKQA DYVPSDQDLL RCRVLTSGIF ETKFQVDKVN FHMFDVGGQR DERRKWIQCF ND VTAIIFV VASSSYNMVI REDNQTNRLQ EALNLFKSIW NNRWLRTISV ILFLNKQDLL AEKVLAGKSK IEDYFPEFAR YTT PEDATP EPGEDPRVTR AKYFIRDEFL RISTASGDGR HYCYPHFTCA VDTENIRRVF NDCRDIIQRM HLRQYELL

UniProtKB: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

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Macromolecule #2: Nanobody35

MacromoleculeName: Nanobody35 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Lama glama (llama)
Molecular weightTheoretical: 15.140742 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
QVQLQESGGG LVQPGGSLRL SCAASGFTFS NYKMNWVRQA PGKGLEWVSD ISQSGASISY TGSVKGRFTI SRDNAKNTLY LQMNSLKPE DTAVYYCARC PAPFTRDCFD VTSTTYAYRG QGTQVTVSSH HHHHHEPEA

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Macromolecule #3: Calcitonin receptor

MacromoleculeName: Calcitonin receptor / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 55.387316 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MRFTFTSRCL ALFLLLNHPT PILPAFSNQT YPTIEPKPFL YVVGRKKMMD AQYKCYDRMQ QLPAYQGEGP YCNRTWDGWL CWDDTPAGV LSYQFCPDYF PDFDPSEKVT KYCDEKGVWF KHPENNRTWS NYTMCNAFTP EKLKNAYVLY YLAIVGHSLS I FTLVISLG ...String:
MRFTFTSRCL ALFLLLNHPT PILPAFSNQT YPTIEPKPFL YVVGRKKMMD AQYKCYDRMQ QLPAYQGEGP YCNRTWDGWL CWDDTPAGV LSYQFCPDYF PDFDPSEKVT KYCDEKGVWF KHPENNRTWS NYTMCNAFTP EKLKNAYVLY YLAIVGHSLS I FTLVISLG IFVFFRSLGC QRVTLHKNMF LTYILNSMII IIHLVEVVPN GELVRRDPVS CKILHFFHQY MMACNYFWML CE GIYLHTL IVVAVFTEKQ RLRWYYLLGW GFPLVPTTIH AITRAVYFND NCWLSVETHL LYIIHGPVMA ALVVNFFFLL NIV RVLVTK MRETHEAESH MYLKAVKATM ILVPLLGIQF VVFPWRPSNK MLGKIYDYVM HSLIHFQGFF VATIYCFCNN EVQT TVKRQ WAQFKIQWNQ RWGRRPSNRS ARAAAAAAEA GDIPIYICHQ EPRNEPANNQ GEESAEIIPL NIIEQESSA

UniProtKB: Calcitonin receptor

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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: 37.41693 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL ...String:
MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL WDIETGQQTT TFTGHTGDVM SLSLAPDTRL FVSGACDASA KLWDVREGMC RQTFTGHESD INAICFFPNG NA FATGSDD ATCRLFDLRA DQELMTYSHD NIICGITSVS FSKSGRLLLA GYDDFNCNVW DALKADRAGV LAGHDNRVSC LGV TDDGMA VATGSWDSFL KIWN

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

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Macromolecule #5: 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: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
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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Macromolecule #6: Calcitonin

MacromoleculeName: Calcitonin / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Oncorhynchus sp. (fish)
Molecular weightTheoretical: 3.438886 KDa
SequenceString:
CSNLSTCVLG KLSQELHKLQ TYPRTNTGSG TP

UniProtKB: Calcitonin

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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

Concentration0.3 mg/mL
BufferpH: 7.5
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsPhase plate: OTHER
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated magnification: 47170 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1445614
Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.34 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 417949
Initial angle assignmentType: PROJECTION MATCHING / Software - Name: RELION
Final angle assignmentType: PROJECTION MATCHING / Software - Name: RELION
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

5uz7


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL
Output model

PDB-6niy:
A high-resolution cryo-electron microscopy structure of a calcitonin receptor-heterotrimeric Gs protein complex

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