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Basic information

Entry
Database: PDB / ID: 6niy
TitleA high-resolution cryo-electron microscopy structure of a calcitonin receptor-heterotrimeric Gs protein complex
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Calcitonin
  • Calcitonin receptor
  • Nanobody35
KeywordsMEMBRANE PROTEIN / GPCR / transmembrane / receptor / calcitonin
Function / homology
Function and homology information


calcitonin receptor binding / calcitonin binding / amylin receptor complex 1 / amylin receptor complex 2 / cross-receptor inhibition within G protein-coupled receptor heterodimer / amylin receptor complex 3 / amylin receptor activity / calcitonin receptor activity / calcitonin gene-related peptide receptor activity / amylin receptor signaling pathway ...calcitonin receptor binding / calcitonin binding / amylin receptor complex 1 / amylin receptor complex 2 / cross-receptor inhibition within G protein-coupled receptor heterodimer / amylin receptor complex 3 / amylin receptor activity / calcitonin receptor activity / calcitonin gene-related peptide receptor activity / amylin receptor signaling pathway / positive regulation of adenylate cyclase activity / Calcitonin-like ligand receptors / negative regulation of ossification / positive regulation of protein kinase A signaling / 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 / adenylate cyclase-activating adrenergic receptor signaling pathway / activation of adenylate cyclase activity / response to glucocorticoid / 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 / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Activation of the phototransduction cascade / hormone activity / G protein activity / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / cilium / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / platelet aggregation / 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 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / cognition / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / 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 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / 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 / cellular response to prostaglandin E stimulus / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / sensory perception of smell / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / positive regulation of cold-induced thermogenesis / retina development in camera-type eye / amyloid-beta binding / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / positive regulation of cytosolic calcium ion concentration / fibroblast proliferation / G alpha (i) signalling events / G alpha (s) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / G alpha (q) signalling events / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / positive regulation of ERK1 and ERK2 cascade / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / cell surface receptor signaling pathway
Similarity search - Function
Calcitonin / GPCR, family 2, calcitonin receptor / GPCR, family 2, calcitonin receptor family / Transducin (heterotrimeric G protein), gamma chain / G Protein Gi Gamma 2 / Calcitonin-like / Calcitonin peptide-like / Calcitonin, conserved site / Calcitonin / CGRP / IAPP family signature. / calcitonin ...Calcitonin / GPCR, family 2, calcitonin receptor / GPCR, family 2, calcitonin receptor family / Transducin (heterotrimeric G protein), gamma chain / G Protein Gi Gamma 2 / 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 / YVTN repeat-like/Quinoprotein amine dehydrogenase / 7 Propeller / Methylamine Dehydrogenase; Chain H / 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 / Few Secondary Structures / Irregular / 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 / Mainly Beta
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)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.34 Å
Authorsdal Maso, E. / Glukhova, A. / Zhu, Y. / Garcia-Nafria, J. / Tate, C.G. / Atanasio, S. / Reynolds, C.A. / Ramirez-Aportela, E. / Carazo, J.-M. / Hick, C.A. ...dal Maso, E. / Glukhova, A. / Zhu, Y. / Garcia-Nafria, J. / Tate, C.G. / Atanasio, S. / Reynolds, C.A. / Ramirez-Aportela, E. / Carazo, J.-M. / Hick, C.A. / Furness, S.G.B. / Hay, D.L. / Liang, Y.-L. / Miller, L.J. / Christopoulos, A. / Wang, M.-W. / Wootten, D. / Sexton, P.M.
Funding support Australia, 4items
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, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 23, 2019Provider: repository / Type: Initial release
Revision 1.1Aug 7, 2019Group: Data collection / Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.title / _citation.year
Revision 1.2Dec 18, 2019Group: Author supporting evidence / Other / Category: atom_sites / pdbx_audit_support
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3] / _pdbx_audit_support.funding_organization
Revision 1.3Apr 8, 2020Group: Data collection / Database references / Category: citation / citation_author / em_imaging_optics
Item: _citation.journal_volume / _citation.pdbx_database_id_PubMed ..._citation.journal_volume / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name / _em_imaging_optics.phase_plate
Revision 1.4Oct 9, 2024Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / em_admin / pdbx_entry_details / pdbx_initial_refinement_model / pdbx_modification_feature
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type / _em_admin.last_update

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Structure visualization

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Assembly

Deposited unit
A: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
N: Nanobody35
R: Calcitonin receptor
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
G: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
P: Calcitonin


Theoretical massNumber of molelcules
Total (without water)164,9716
Polymers164,9716
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area14720 Å2
ΔGint-85 kcal/mol
Surface area42880 Å2

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Components

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Guanine nucleotide-binding protein ... , 3 types, 3 molecules ABG

#1: Protein Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Adenylate cyclase-stimulating G alpha protein


Mass: 45725.520 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAS, GNAS1, GSP / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P63092
#4: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 37416.930 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P62873
#5: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / G gamma-I


Mass: 7861.143 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNG2 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P59768

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Antibody / Protein / Protein/peptide , 3 types, 3 molecules NRP

#2: Antibody Nanobody35


Mass: 15140.742 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Lama glama (llama) / Production host: Escherichia coli (E. coli)
#3: Protein Calcitonin receptor / CT-R


Mass: 55387.316 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CALCR / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P30988
#6: Protein/peptide Calcitonin


Mass: 3438.886 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Oncorhynchus sp. (fish) / References: UniProt: Q92163

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Details

Has protein modificationY

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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: Complex of a full-length, active-state calcitonin receptor with peptide ligand, heterotrimeric Gs protein and nanobody 35
Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.15 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 7.5
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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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 FIELD / Calibrated magnification: 47170 X / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
EM imaging opticsPhase plate: OTHER

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Processing

Software
NameVersionClassificationNB
phenix.real_space_refine1.14_3260refinement
PHENIX1.14_3260refinement
EM software
IDNameVersionCategory
1RELIONparticle selection
4GctfCTF correction
7Coot0.8.9.1model fitting
9RELIONinitial Euler assignment
10RELIONfinal Euler assignment
12RELION3D reconstruction
13PHENIX1.14-3260model refinement
CTF correctionDetails: Phase Plate CTF correction / Type: NONE
Particle selectionNum. of particles selected: 1445614
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.34 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 417949 / Symmetry type: POINT
Atomic model buildingSpace: REAL
Atomic model buildingPDB-ID: 5UZ7

5uz7


Accession code: 5UZ7 / Source name: PDB / Type: experimental model
RefinementStereochemistry target values: CDL v1.2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00837893
ELECTRON MICROSCOPYf_angle_d0.980810679
ELECTRON MICROSCOPYf_chiral_restr0.06421198
ELECTRON MICROSCOPYf_plane_restr0.00651346
ELECTRON MICROSCOPYf_dihedral_angle_d3.86974665

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