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- PDB-9bkk: Cholecystokinin 1 receptor (CCK1R) sterol 7M mutant, Gq chimera (... -

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Basic information

Entry
Database: PDB / ID: 9bkk
TitleCholecystokinin 1 receptor (CCK1R) sterol 7M mutant, Gq chimera (mGsqi) complex
Components
  • Cholecystokinin receptor type A
  • Cholecystokinin-8
  • 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 XLas
KeywordsMEMBRANE PROTEIN / cholecystokinin / GPCR / cholesterol / mutant
Function / homology
Function and homology information


cholecystokinin receptor activity / cholecystokinin signaling pathway / regulation of hormone secretion / sensory perception of chemical stimulus / mu-type opioid receptor binding / corticotropin-releasing hormone receptor 1 binding / neuropeptide hormone activity / beta-2 adrenergic receptor binding / eating behavior / peptide hormone receptor binding ...cholecystokinin receptor activity / cholecystokinin signaling pathway / regulation of hormone secretion / sensory perception of chemical stimulus / mu-type opioid receptor binding / corticotropin-releasing hormone receptor 1 binding / neuropeptide hormone activity / beta-2 adrenergic receptor binding / eating behavior / peptide hormone receptor binding / PKA activation in glucagon signalling / peptide hormone binding / developmental growth / D1 dopamine receptor binding / Hedgehog 'off' state / response to prostaglandin E / cellular response to hormone stimulus / forebrain development / digestion / ionotropic glutamate receptor binding / insulin-like growth factor receptor binding / adenylate cyclase activator activity / axonogenesis / Peptide ligand-binding receptors / peptide binding / neuron migration / bone development / hormone activity / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / adenylate cyclase-activating G protein-coupled receptor signaling pathway / 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 / platelet aggregation / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / 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 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / 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 taste / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / 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 / G protein activity / positive regulation of cold-induced thermogenesis / retina development in camera-type eye / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / 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 / apical plasma membrane / G protein-coupled receptor signaling pathway / axon / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / GTP binding / signal transduction / extracellular space / extracellular exosome / extracellular region / nucleoplasm / membrane / metal ion binding / plasma membrane / cytosol
Similarity search - Function
Cholecystokinin-like / Gastrin/cholecystokinin peptide hormone / Gastrin/cholecystokinin, conserved site / Gastrin/cholecystokinin family / Gastrin / cholecystokinin family signature. / gastrin / cholecystokinin / caerulein family / Cholecystokinin receptor type A / Cholecystokinin A receptor, N-terminal / Cholecystokinin A receptor, N-terminal domain superfamily / Cholecystokinin A receptor, N-terminal ...Cholecystokinin-like / Gastrin/cholecystokinin peptide hormone / Gastrin/cholecystokinin, conserved site / Gastrin/cholecystokinin family / Gastrin / cholecystokinin family signature. / gastrin / cholecystokinin / caerulein family / Cholecystokinin receptor type A / Cholecystokinin A receptor, N-terminal / Cholecystokinin A receptor, N-terminal domain superfamily / Cholecystokinin A receptor, N-terminal / Cholecystokinin receptor / G-protein alpha subunit, group S / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / 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
Cholecystokinin / Cholecystokinin receptor type A / 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 XLas
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.51 Å
AuthorsHarikumar, K.G. / Zhao, P. / Cary, B.P. / Xu, X. / Desai, A.J. / Mobbs, J.I. / Toufaily, C. / Furness, S.G.B. / Christopoulos, A. / Belousoff, M.J. ...Harikumar, K.G. / Zhao, P. / Cary, B.P. / Xu, X. / Desai, A.J. / Mobbs, J.I. / Toufaily, C. / Furness, S.G.B. / Christopoulos, A. / Belousoff, M.J. / Wootten, D. / Sexton, P.M. / Miller, L.J.
Funding support United States, Australia, 4items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM141003 United States
National Health and Medical Research Council (NHMRC, Australia)1154434 Australia
National Health and Medical Research Council (NHMRC, Australia)1155302 Australia
Australian Research Council (ARC)FT180100543 Australia
CitationJournal: PLoS Biol / Year: 2024
Title: Cholesterol-dependent dynamic changes in the conformation of the type 1 cholecystokinin receptor affect ligand binding and G protein coupling.
Authors: Kaleeckal G Harikumar / Peishen Zhao / Brian P Cary / Xiaomeng Xu / Aditya J Desai / Maoqing Dong / Jesse I Mobbs / Chirine Toufaily / Sebastian G B Furness / Arthur Christopoulos / Matthew ...Authors: Kaleeckal G Harikumar / Peishen Zhao / Brian P Cary / Xiaomeng Xu / Aditya J Desai / Maoqing Dong / Jesse I Mobbs / Chirine Toufaily / Sebastian G B Furness / Arthur Christopoulos / Matthew J Belousoff / Denise Wootten / Patrick M Sexton / Laurence J Miller /
Abstract: Development of optimal therapeutics for disease states that can be associated with increased membrane cholesterol requires better molecular understanding of lipid modulation of the drug target. Type ...Development of optimal therapeutics for disease states that can be associated with increased membrane cholesterol requires better molecular understanding of lipid modulation of the drug target. Type 1 cholecystokinin receptor (CCK1R) agonist actions are affected by increased membrane cholesterol, enhancing ligand binding and reducing calcium signaling, while agonist actions of the closely related CCK2R are not. In this work, we identified a set of chimeric human CCK1R/CCK2R mutations that exchange the cholesterol sensitivity of these 2 receptors, providing powerful tools when expressed in CHO and HEK-293 model cell lines to explore mechanisms. Static, low energy, high-resolution structures of the mutant CCK1R constructs, stabilized in complex with G protein, were not substantially different, suggesting that alterations to receptor dynamics were key to altered function. We reveal that cholesterol-dependent dynamic changes in the conformation of the helical bundle of CCK receptors affects both ligand binding at the extracellular surface and G protein coupling at the cytosolic surface, as well as their interrelationships involved in stimulus-response coupling. This provides an ideal setting for potential allosteric modulators to correct the negative impact of membrane cholesterol on CCK1R.
History
DepositionApr 29, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 22, 2024Provider: repository / Type: Initial release
Revision 1.1Aug 14, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.2Oct 16, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Guanine nucleotide-binding protein G(s) subunit alpha isoforms XLas
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: Cholecystokinin-8
R: Cholecystokinin receptor type A


Theoretical massNumber of molelcules
Total (without water)123,2575
Polymers123,2575
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Guanine nucleotide-binding protein G(s) subunit alpha isoforms XLas / Adenylate cyclase-stimulating G alpha protein / Extra large alphas protein / XLalphas


Mass: 29144.971 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: Guanine nucleotide-binding protein G(i) subunit alpha-1,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,with certain residues mutated to match Guanine nucleotide-binding protein G(q) subunit
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAS, GNAS1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: Q5JWF2
#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 37413.863 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
#3: 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
#4: Protein/peptide Cholecystokinin-8 / CCK-8


Mass: 1142.262 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human) / References: UniProt: P06307
#5: Protein Cholecystokinin receptor type A / CCK-A receptor / CCK-AR / Cholecystokinin-1 receptor / CCK1-R


Mass: 47694.750 Da / Num. of mol.: 1 / Mutation: F130L, S136A, G141S, I216L, L219F, I223V, M226A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CCKAR, CCKRA / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P32238
Has ligand of interestY
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 CCK1R (sterol 7M mutant) bound to miniGs (Gq, Gi chimera), G-beta1, G-gamma-2 and CCK8s.
Type: COMPLEX
Details: Single-chain fragment variable 16 (ScFv16) was included in the complex but left unmodeled.
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: 7.4
SpecimenConc.: 7.8 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: Gold coated. Negative polarity glow discharge. / Grid material: GOLD / Grid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

MicroscopyModel: FEI TITAN
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1200 nm / Nominal defocus min: 600 nm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 6878

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Processing

EM software
IDNameVersionCategory
1crYOLO1.7.6particle selection
2EPUimage acquisition
4CTFFIND4.1.4CTF correction
9PHENIX1.19model refinement
10cryoSPARC4.1.2initial Euler assignment
11cryoSPARC4.1.2final Euler assignment
13cryoSPARC4.1.23D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 3644147
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.51 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 279231 / Symmetry type: POINT
Atomic model buildingPDB-ID: 7MBY

7mby


Accession code: 7MBY / Source name: PDB / Type: experimental model

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