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- PDB-7xov: Structural insights into human brain gut peptide cholecystokinin ... -

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Basic information

Entry
Database: PDB / ID: 7xov
TitleStructural insights into human brain gut peptide cholecystokinin receptors
Components
  • (Guanine nucleotide-binding protein ...) x 2
  • Cholecystokinin receptor type A
  • Isoform Gnas-2 of Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
  • Nanobody 35Single-domain antibody
KeywordsNEUROPEPTIDE / brain gut peptide receptor Class A G-protein-coupled receptor
Function / homology
Function and homology information


cholecystokinin receptor activity / cholecystokinin signaling pathway / regulation of hormone secretion / peptide hormone binding / forebrain development / cellular response to hormone stimulus / Peptide ligand-binding receptors / axonogenesis / peptide binding / neuron migration ...cholecystokinin receptor activity / cholecystokinin signaling pathway / regulation of hormone secretion / peptide hormone binding / forebrain development / cellular response to hormone stimulus / Peptide ligand-binding receptors / axonogenesis / peptide binding / neuron migration / 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 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / 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 / 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 / sensory perception of taste / GPER1 signaling / 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) / retina development in camera-type eye / GTPase binding / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / nucleoplasm / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Cholecystokinin receptor type A / Cholecystokinin A receptor, N-terminal / Cholecystokinin A receptor, N-terminal domain superfamily / Cholecystokinin A receptor, N-terminal / Cholecystokinin receptor / Serpentine type 7TM GPCR chemoreceptor Srsx / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily ...Cholecystokinin receptor type A / Cholecystokinin A receptor, N-terminal / Cholecystokinin A receptor, N-terminal domain superfamily / Cholecystokinin A receptor, N-terminal / Cholecystokinin receptor / Serpentine type 7TM GPCR chemoreceptor Srsx / 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
Similarity search - Domain/homology
Chem-IA1 / 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 / Isoform Gnas-2 of Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å
AuthorsDing, Y. / Zhang, H. / Liao, Y. / Chen, L. / Ji, S.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Cell Discov / Year: 2022
Title: Structural insights into human brain-gut peptide cholecystokinin receptors.
Authors: Yu Ding / Huibing Zhang / Yu-Ying Liao / Li-Nan Chen / Su-Yu Ji / Jiao Qin / Chunyou Mao / Dan-Dan Shen / Lin Lin / Hao Wang / Yan Zhang / Xiao-Ming Li /
Abstract: The intestinal hormone and neuromodulator cholecystokinin (CCK) receptors CCK1R and CCK2R act as a signaling hub in brain-gut axis, mediating digestion, emotion, and memory regulation. CCK receptors ...The intestinal hormone and neuromodulator cholecystokinin (CCK) receptors CCK1R and CCK2R act as a signaling hub in brain-gut axis, mediating digestion, emotion, and memory regulation. CCK receptors exhibit distinct preferences for ligands in different posttranslational modification (PTM) states. CCK1R couples to G and G, whereas CCK2R primarily couples to G. Here we report the cryo-electron microscopy (cryo-EM) structures of CCK1R-G signaling complexes liganded either by sulfated cholecystokinin octapeptide (CCK-8) or a CCK1R-selective small-molecule SR146131, and CCK2R-G complexes stabilized by either sulfated CCK-8 or a CCK2R-selective ligand gastrin-17. Our structures reveal a location-conserved yet charge-distinct pocket discriminating the effects of ligand PTM states on receptor subtype preference, the unique pocket topology underlying selectivity of SR146131 and gastrin-17, the conformational changes in receptor activation, and key residues contributing to G protein subtype specificity, providing multiple structural templates for drug design targeting the brain-gut axis.
History
DepositionMay 1, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jul 20, 2022Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Isoform Gnas-2 of 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: Nanobody 35
R: Cholecystokinin receptor type A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)151,5516
Polymers150,9415
Non-polymers6101
Water181
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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Protein , 2 types, 2 molecules AR

#1: Protein Isoform Gnas-2 of Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Adenylate cyclase-stimulating G alpha protein


Mass: 44284.074 Da / Num. of mol.: 1
Mutation: S54N, G226A, E268A, N271K, K274D, R280K, T284D, I285T
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAS, GNAS1, GSP / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P63092-2
#5: Protein Cholecystokinin receptor type A / CCK-A receptor / CCK-AR / Cholecystokinin-1 receptor / CCK1-R


Mass: 47886.062 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CCKAR, CCKRA / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P32238

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Guanine nucleotide-binding protein ... , 2 types, 2 molecules BG

#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 37198.656 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Spodoptera frugiperda (fall armyworm) / 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: Spodoptera frugiperda (fall armyworm) / References: UniProt: P59768

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Antibody , 1 types, 1 molecules N

#4: Antibody Nanobody 35 / Single-domain antibody


Mass: 13711.284 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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Non-polymers , 2 types, 2 molecules

#6: Chemical ChemComp-IA1 / 2-[2-[[4-(4-chloranyl-2,5-dimethoxy-phenyl)-5-(2-cyclohexylethyl)-1,3-thiazol-2-yl]carbamoyl]-5,7-dimethyl-indol-1-yl]ethanoic acid


Mass: 610.163 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C32H36ClN3O5S / Feature type: SUBJECT OF INVESTIGATION
#7: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 1 / 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
1cholecystokinin receptor1COMPLEXcholecystokinin receptor1, Gs protein, Nanobody35#1-#50MULTIPLE SOURCES
2cholecystokinin receptor1COMPLEX#51RECOMBINANT
3Gs proteinGs alpha subunitCOMPLEX#1-#31RECOMBINANT
4Nanobody35COMPLEX#41SYNTHETIC
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Spodoptera frugiperda (fall armyworm)7108
23Spodoptera frugiperda (fall armyworm)7108
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 5000 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 62 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 606654 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0038382
ELECTRON MICROSCOPYf_angle_d0.5311348
ELECTRON MICROSCOPYf_dihedral_angle_d12.2985009
ELECTRON MICROSCOPYf_chiral_restr0.0391282
ELECTRON MICROSCOPYf_plane_restr0.0041440

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