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- PDB-7f8v: Cryo-EM structure of the cholecystokinin receptor CCKBR in comple... -

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Basic information

Entry
Database: PDB / ID: 7f8v
TitleCryo-EM structure of the cholecystokinin receptor CCKBR in complex with gastrin-17 and Gi
Components
  • Gastrin-17Little gastrin I
  • Gastrin/cholecystokinin type B 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(i) subunit alpha-2
KeywordsSTRUCTURAL PROTEIN / G protein-coulped receptor / Cholecystokinin receptor CCKBR / Gastrin-17
Function / homology
Function and homology information


gastrin receptor activity / type B gastrin/cholecystokinin receptor binding / gland development / gastric acid secretion / pH reduction / cholecystokinin receptor activity / cholecystokinin signaling pathway / negative regulation of adenylate cyclase-activating adrenergic receptor signaling pathway involved in heart process / G protein-coupled adenosine receptor signaling pathway / negative regulation of calcium ion-dependent exocytosis ...gastrin receptor activity / type B gastrin/cholecystokinin receptor binding / gland development / gastric acid secretion / pH reduction / cholecystokinin receptor activity / cholecystokinin signaling pathway / negative regulation of adenylate cyclase-activating adrenergic receptor signaling pathway involved in heart process / G protein-coupled adenosine receptor signaling pathway / negative regulation of calcium ion-dependent exocytosis / positive regulation of urine volume / negative regulation of adenylate cyclase activity / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of neural precursor cell proliferation / Gastrin-CREB signalling pathway via PKC and MAPK / digestive tract development / gamma-aminobutyric acid signaling pathway / negative regulation of synaptic transmission / neuronal dense core vesicle / regulation of calcium ion transport / peptide hormone binding / negative regulation of apoptotic signaling pathway / Adenylate cyclase inhibitory pathway / positive regulation of insulin receptor signaling pathway / positive regulation of vascular associated smooth muscle cell proliferation / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / Peptide ligand-binding receptors / response to nutrient / positive regulation of superoxide anion generation / Regulation of insulin secretion / G protein-coupled receptor binding / G-protein beta/gamma-subunit complex binding / 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 activation / G protein-coupled acetylcholine receptor signaling pathway / 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 / adenylate cyclase-activating G protein-coupled receptor signaling pathway / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Sensory perception of sweet, bitter, and umami (glutamate) taste / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Adrenaline,noradrenaline inhibits insulin secretion / photoreceptor disc membrane / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / adenylate cyclase-activating dopamine receptor signaling pathway / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / sensory perception of taste / GPER1 signaling / G-protein beta-subunit binding / heterotrimeric G-protein complex / Inactivation, recovery and regulation of the phototransduction cascade / extracellular vesicle / G alpha (12/13) signalling events / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / GTPase binding / cell body / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / midbody / positive regulation of cytosolic calcium ion concentration / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / cell population proliferation / Ras protein signal transduction / Extra-nuclear estrogen signaling / positive regulation of ERK1 and ERK2 cascade / cell surface receptor signaling pathway / positive regulation of cell migration / cell cycle / G protein-coupled receptor signaling pathway / cell division / lysosomal membrane / intracellular membrane-bounded organelle / GTPase activity / centrosome / dendrite / synapse / positive regulation of cell population proliferation / protein-containing complex binding / GTP binding
Similarity search - Function
Gastrin receptor / Cholecystokinin receptor / G-protein alpha subunit, group I / 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. ...Gastrin receptor / Cholecystokinin receptor / G-protein alpha subunit, group I / 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. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Guanine nucleotide-binding protein G(i) subunit alpha-2 / Gastrin/cholecystokinin type B 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
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsZhang, X. / He, C. / Wang, M. / Zhou, Q. / Yang, D. / Zhu, Y. / Wu, B. / Zhao, Q.
Funding support China, 10items
OrganizationGrant numberCountry
National Science Foundation (NSF, China)21704064 China
National Science Foundation (NSF, China)81773792 China
National Science Foundation (NSF, China)81973373 China
National Science Foundation (NSF, China)31800621 China
National Science Foundation (NSF, China)31770796 China
National Science Foundation (NSF, China)31971178 China
National Science Foundation (NSF, China)81872915 China
National Science Foundation (NSF, China)82073904 China
National Science Foundation (NSF, China)31825010 China
National Science Foundation (NSF, China)81525024 China
CitationJournal: Nat Chem Biol / Year: 2021
Title: Structures of the human cholecystokinin receptors bound to agonists and antagonists.
Authors: Xuefeng Zhang / Chenglin He / Mu Wang / Qingtong Zhou / Dehua Yang / Ya Zhu / Wenbo Feng / Hui Zhang / Antao Dai / Xiaojing Chu / Jia Wang / Zhenlin Yang / Yi Jiang / Ulrich Sensfuss / ...Authors: Xuefeng Zhang / Chenglin He / Mu Wang / Qingtong Zhou / Dehua Yang / Ya Zhu / Wenbo Feng / Hui Zhang / Antao Dai / Xiaojing Chu / Jia Wang / Zhenlin Yang / Yi Jiang / Ulrich Sensfuss / Qiuxiang Tan / Shuo Han / Steffen Reedtz-Runge / H Eric Xu / Suwen Zhao / Ming-Wei Wang / Beili Wu / Qiang Zhao /
Abstract: Cholecystokinin receptors, CCKR and CCKR, are important neurointestinal peptide hormone receptors and play a vital role in food intake and appetite regulation. Here, we report three crystal ...Cholecystokinin receptors, CCKR and CCKR, are important neurointestinal peptide hormone receptors and play a vital role in food intake and appetite regulation. Here, we report three crystal structures of the human CCKR in complex with different ligands, including one peptide agonist and two small-molecule antagonists, as well as two cryo-electron microscopy structures of CCKR-gastrin in complex with G and G, respectively. These structures reveal the recognition pattern of different ligand types and the molecular basis of peptide selectivity in the cholecystokinin receptor family. By comparing receptor structures in different conformational states, a stepwise activation process of cholecystokinin receptors is proposed. Combined with pharmacological data, our results provide atomic details for differential ligand recognition and receptor activation mechanisms. These insights will facilitate the discovery of potential therapeutics targeting cholecystokinin receptors.
History
DepositionJul 2, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 13, 2021Provider: repository / Type: Initial release
Revision 1.1Feb 16, 2022Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

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Assembly

Deposited unit
A: Guanine nucleotide-binding protein G(i) subunit alpha-2
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
C: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
E: Gastrin-17
R: Gastrin/cholecystokinin type B receptor


Theoretical massNumber of molelcules
Total (without water)139,7325
Polymers139,7325
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area9130 Å2
ΔGint-58 kcal/mol
Surface area35520 Å2

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Components

#1: Protein Guanine nucleotide-binding protein G(i) subunit alpha-2 / Adenylate cyclase-inhibiting G alpha protein


Mass: 40502.863 Da / Num. of mol.: 1 / Mutation: S47N, G204A, E246A, A327S
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAI2, GNAI2B / Production host: Baculovirus expression vector pFastBac1-HM / References: UniProt: P04899
#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 38744.371 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Baculovirus expression vector pFastBac1-HM / 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: Baculovirus expression vector pFastBac1-HM / References: UniProt: P59768
#4: Protein/peptide Gastrin-17 / Little gastrin I


Mass: 2098.203 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)
#5: Protein Gastrin/cholecystokinin type B receptor / CCK-B receptor / CCK-BR / Cholecystokinin-2 receptor / CCK2-R


Mass: 50524.922 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CCKBR, CCKRB / Production host: Baculovirus expression vector pFastBac1-HM / References: UniProt: P32239
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
IDNameTypeEntity IDParent-IDSource
1Cholecystokinin recetor CCKBR in complex with gastrin-17 and GiCOMPLEXall0RECOMBINANT
2Guanine nucleotide-binding protein G(i) subunitCOMPLEX#1-#3, #51RECOMBINANT
3Gastrin-17Little gastrin ICOMPLEX#41SYNTHETIC
4cholecystokinin type B receptorCOMPLEX#51RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
43Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Baculovirus expression vector pFastBac1-HM274590
33Baculovirus expression vector pFastBac1-HM274590
Buffer solutionpH: 7.5
SpecimenEmbedding 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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 1.75 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

Software
NameVersionClassification
phenix.real_space_refine1.19.2_4158refinement
PHENIX1.19.2_4158refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 1338153 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 48.26 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00536743
ELECTRON MICROSCOPYf_angle_d0.89269150
ELECTRON MICROSCOPYf_chiral_restr0.05381057
ELECTRON MICROSCOPYf_plane_restr0.00731147
ELECTRON MICROSCOPYf_dihedral_angle_d14.09352391

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