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- PDB-7mbx: Human Cholecystokinin 1 receptor (CCK1R) Gs complex -

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Basic information

Entry
Database: PDB / ID: 7mbx
TitleHuman Cholecystokinin 1 receptor (CCK1R) Gs complex
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Cholecystokinin receptor type A
  • Cholecystokinin-8
  • Nanobody35
KeywordsMEMBRANE PROTEIN/SIGNALING PROTEIN / GPCR / MEMBRANE PROTEIN / MEMBRANE PROTEIN-SIGNALING PROTEIN complex
Function / homology
Function and homology information


cholecystokinin receptor activity / cholecystokinin signaling pathway / regulation of hormone secretion / neuropeptide receptor activity / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / neuropeptide hormone activity ...cholecystokinin receptor activity / cholecystokinin signaling pathway / regulation of hormone secretion / neuropeptide receptor activity / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / neuropeptide hormone activity / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / G alpha (z) signalling events / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / G alpha (i) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / alkylglycerophosphoethanolamine phosphodiesterase activity / peptide hormone receptor binding / photoreceptor outer segment membrane / eating behavior / spectrin binding / peptide hormone binding / PKA activation in glucagon signalling / hair follicle placode formation / photoreceptor outer segment / mu-type opioid receptor binding / developmental growth / corticotropin-releasing hormone receptor 1 binding / intracellular transport / D1 dopamine receptor binding / Hedgehog 'off' state / beta-2 adrenergic receptor binding / adenylate cyclase-activating adrenergic receptor signaling pathway / forebrain development / cellular response to hormone stimulus / cardiac muscle cell apoptotic process / digestion / activation of adenylate cyclase activity / adenylate cyclase activator activity / photoreceptor inner segment / Peptide ligand-binding receptors / axonogenesis / trans-Golgi network membrane / peptide binding / insulin-like growth factor receptor binding / ionotropic glutamate receptor binding / neuron migration / G-protein beta/gamma-subunit complex binding / bone development / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Prostacyclin signalling through prostacyclin receptor / hormone activity / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / cognition / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / platelet aggregation / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of smell / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / retina development in camera-type eye / phospholipase C-activating G protein-coupled receptor signaling pathway / Ca2+ pathway / positive regulation of cold-induced thermogenesis / G alpha (i) signalling events / cell body / positive regulation of cytosolic calcium ion concentration
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 / G-alpha domain profile. / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily / G-protein gamma-like domain / GGL domain / G protein gamma subunit-like motifs / 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
CHOLESTEROL HEMISUCCINATE / Cholecystokinin / Cholecystokinin receptor type A / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
Similarity search - Component
Biological speciesHomo sapiens (human)
Rattus norvegicus (Norway rat)
Lama glama (llama)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 1.95 Å
AuthorsMobbs, J.I. / Belousoff, M.J. / Danev, R. / Thal, D.M. / Sexton, P.M.
Funding support Australia, Japan, 3items
OrganizationGrant numberCountry
Australian Research Council (ARC) Australia
National Health and Medical Research Council (NHMRC, Australia) Australia
Japan Science and Technology Japan
Citation
Journal: PLoS Biol / Year: 2021
Title: Structures of the human cholecystokinin 1 (CCK1) receptor bound to Gs and Gq mimetic proteins provide insight into mechanisms of G protein selectivity.
Authors: Jesse I Mobbs / Matthew J Belousoff / Kaleeckal G Harikumar / Sarah J Piper / Xiaomeng Xu / Sebastian G B Furness / Hari Venugopal / Arthur Christopoulos / Radostin Danev / Denise Wootten / ...Authors: Jesse I Mobbs / Matthew J Belousoff / Kaleeckal G Harikumar / Sarah J Piper / Xiaomeng Xu / Sebastian G B Furness / Hari Venugopal / Arthur Christopoulos / Radostin Danev / Denise Wootten / David M Thal / Laurence J Miller / Patrick M Sexton /
Abstract: G protein-coupled receptors (GPCRs) are critical regulators of cellular function acting via heterotrimeric G proteins as their primary transducers with individual GPCRs capable of pleiotropic ...G protein-coupled receptors (GPCRs) are critical regulators of cellular function acting via heterotrimeric G proteins as their primary transducers with individual GPCRs capable of pleiotropic coupling to multiple G proteins. Structural features governing G protein selectivity and promiscuity are currently unclear. Here, we used cryo-electron microscopy (cryo-EM) to determine structures of the cholecystokinin (CCK) type 1 receptor (CCK1R) bound to the CCK peptide agonist, CCK-8 and 2 distinct transducer proteins, its primary transducer Gq, and the more weakly coupled Gs. As seen with other Gq/11-GPCR complexes, the Gq-α5 helix (αH5) bound to a relatively narrow pocket in the CCK1R core. Surprisingly, the backbone of the CCK1R and volume of the G protein binding pocket were essentially equivalent when Gs was bound, with the Gs αH5 displaying a conformation that arises from "unwinding" of the far carboxyl-terminal residues, compared to canonically Gs coupled receptors. Thus, integrated changes in the conformations of both the receptor and G protein are likely to play critical roles in the promiscuous coupling of individual GPCRs.
#1: Journal: Biorxiv / Year: 2021
Title: Structures of the human cholecystokinin 1 (CCK1) receptor bound to Gs and Gq mimetic proteins: insight into mechanisms of G protein selectivity
Authors: Mobbs, J. / Belousoff, M.J. / Harikumar, K.G. / Piper, S.J. / Xu, X. / Furness, S.G.B. / Venugopal, H. / Christopoulos, A. / Danev, R. / Wootten, D. / Thal, D.M. / Miller, L.J. / Sexton, P.M.
History
DepositionApr 1, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 26, 2021Provider: repository / Type: Initial release
Revision 1.1Jul 14, 2021Group: Database references / Category: citation / citation_author
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 / _citation_author.identifier_ORCID

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Structure visualization

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Assembly

Deposited unit
A: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
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
N: Nanobody35
P: Cholecystokinin-8
R: Cholecystokinin receptor type A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)156,6077
Polymers156,1216
Non-polymers4871
Water1,09961
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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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: 45699.434 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
#2: 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.) Rattus norvegicus (Norway rat) / Gene: Gnb1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P54311
#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

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

#4: 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)
#5: 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
#6: Protein Cholecystokinin receptor type A / CCK-A receptor / CCK-AR / Cholecystokinin-1 receptor / CCK1-R


Mass: 48860.027 Da / Num. of mol.: 1
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

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Non-polymers , 2 types, 62 molecules

#7: Chemical ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C31H50O4
#8: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 61 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY

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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

Component
IDNameTypeDetailsEntity IDParent-IDSource
1CCK1R/CCK-8/Gas complexCOMPLEXCCK1R/CCK-8/Gas/Gb1/Gg2/NB35#1-#60MULTIPLE SOURCES
2Cholecystokinin receptor type ACOMPLEX#61RECOMBINANT
3Guanine nucleotide-binding protein G(s) subunits alpha and gammaCOMPLEX#1, #31RECOMBINANT
4Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1COMPLEX#21RECOMBINANT
5Nanobody35COMPLEX#41RECOMBINANT
6Cholecystokinin-8COMPLEX#51SYNTHETIC
Molecular weightValue: 140 kDa/nm / Experimental value: YES
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
22Homo sapiens (human)9606
33Homo sapiens (human)9606
44Rattus norvegicus (Norway rat)10116
55Lama glama (llama)9844
66Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Trichoplusia ni (cabbage looper)7111
23Trichoplusia ni (cabbage looper)7111
34Trichoplusia ni (cabbage looper)7111
45Escherichia coli (E. coli)562
Buffer solutionpH: 7.5
SpecimenConc.: 4.1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 70.56 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 1.95 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 643000 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0048543
ELECTRON MICROSCOPYf_angle_d0.78111583
ELECTRON MICROSCOPYf_dihedral_angle_d11.7823071
ELECTRON MICROSCOPYf_chiral_restr0.0521319
ELECTRON MICROSCOPYf_plane_restr0.0071468

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