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- EMDB-31493: Cryo-EM structure of the cholecystokinin receptor CCKBR in comple... -

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Entry
Database: EMDB / ID: EMD-31493
TitleCryo-EM structure of the cholecystokinin receptor CCKBR in complex with gastrin-17 and Gi
Map dataCCKBR-Gi complex
Sample
  • Complex: Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi
    • Complex: Guanine nucleotide-binding protein G(i) subunit
      • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-2
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Gastrin/cholecystokinin type B receptor
    • Complex: Gastrin-17
      • Protein or peptide: Gastrin-17
    • Complex: cholecystokinin type B receptor
Function / homology
Function and homology information


gastrin receptor activity / type B gastrin/cholecystokinin receptor binding / gland development / cholecystokinin receptor activity / cholecystokinin signaling pathway / gastric acid secretion / pH reduction / 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 / cholecystokinin receptor activity / cholecystokinin signaling pathway / gastric acid secretion / pH reduction / 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 / 1-phosphatidylinositol-3-kinase regulator activity / negative regulation of adenylate cyclase activity / digestive tract development / Gastrin-CREB signalling pathway via PKC and MAPK / positive regulation of neural precursor cell proliferation / gamma-aminobutyric acid signaling pathway / negative regulation of synaptic transmission / neuronal dense core vesicle / peptide hormone binding / regulation of calcium ion transport / 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 / 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 / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / 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 / 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 / retina development in camera-type eye / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / positive regulation of cytosolic calcium ion concentration / midbody / cell body / 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 / positive regulation of ERK1 and ERK2 cascade / cell surface receptor signaling pathway / positive regulation of cell migration / G protein-coupled receptor signaling pathway / lysosomal membrane / cell division / intracellular membrane-bounded organelle / GTPase activity / centrosome / positive regulation of cell population proliferation / dendrite / synapse / protein-containing complex binding / GTP binding / signal transduction
Similarity search - Function
Gastrin receptor / Cholecystokinin receptor / G-protein alpha subunit, group I / 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. ...Gastrin receptor / Cholecystokinin receptor / G-protein alpha subunit, group I / 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
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)
Methodsingle 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, 10 items
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, 2021-
Header (metadata) releaseOct 13, 2021-
Map releaseOct 13, 2021-
UpdateFeb 16, 2022-
Current statusFeb 16, 2022Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.03
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.03
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7f8v
  • Surface level: 0.03
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31493.png

Downloads & links

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Map

FileDownload / File: emd_31493.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCCKBR-Gi complex
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 256 pix.
= 267.52 Å		1.05 Å/pix.
x 256 pix.
= 267.52 Å		1.05 Å/pix.
x 256 pix.
= 267.52 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.045 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.035 / Movie #1: 0.03
Minimum - Maximum-0.1435475 - 0.19958228
Average (Standard dev.)0.00021801518 (±0.003145358)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 267.52 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0451.0451.045
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z267.520267.520267.520
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-0.1440.2000.000

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Supplemental data

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Sample components

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Entire : Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi

EntireName: Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi
Components
  • Complex: Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi
    • Complex: Guanine nucleotide-binding protein G(i) subunit
      • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-2
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Gastrin/cholecystokinin type B receptor
    • Complex: Gastrin-17
      • Protein or peptide: Gastrin-17
    • Complex: cholecystokinin type B receptor

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Supramolecule #1: Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi

SupramoleculeName: Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Baculovirus expression vector pFastBac1-HM

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Supramolecule #2: Guanine nucleotide-binding protein G(i) subunit

SupramoleculeName: Guanine nucleotide-binding protein G(i) subunit / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#3, #5

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Supramolecule #3: Gastrin-17

SupramoleculeName: Gastrin-17 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #4
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #4: cholecystokinin type B receptor

SupramoleculeName: cholecystokinin type B receptor / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #5

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Macromolecule #1: Guanine nucleotide-binding protein G(i) subunit alpha-2

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-2
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.502863 KDa
Recombinant expressionOrganism: Baculovirus expression vector pFastBac1-HM
SequenceString: MGCTVSAEDK AAAERSKMID KNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEDG YSEEECRQYR AVVYSNTIQS IMAIVKAMG NLQIDFADPS RADDARQLFA LSCTAEEQGV LPDDLSGVIR RLWADHGVQA CFGRSREYQL NDSAAYYLND L ERIAQSDY ...String:
MGCTVSAEDK AAAERSKMID KNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEDG YSEEECRQYR AVVYSNTIQS IMAIVKAMG NLQIDFADPS RADDARQLFA LSCTAEEQGV LPDDLSGVIR RLWADHGVQA CFGRSREYQL NDSAAYYLND L ERIAQSDY IPTQQDVLRT RVKTTGIVET HFTFKDLHFK MFDVGAQRSE RKKWIHCFEG VTAIIFCVAL SAYDLVLAED EE MNRMHAS MKLFDSICNN KWFTDTSIIL FLNKKDLFEE KITHSPLTIC FPEYTGANKY DEAASYIQSK FEDLNKRKDT KEI YTHFTC STDTKNVQFV FDAVTDVIIK NNLKDCGLF

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

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 38.744371 KDa
Recombinant expressionOrganism: Baculovirus expression vector pFastBac1-HM
SequenceString: MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI ...String:
MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI VTSSGDTTCA LWDIETGQQT TTFTGHTGDV MSLSLAPDTR LFVSGACDAS AKLWDVREGM CRQTFTGHES DI NAICFFP NGNAFATGSD DATCRLFDLR ADQELMTYSH DNIICGITSV SFSKSGRLLL AGYDDFNCNV WDALKADRAG VLA GHDNRV SCLGVTDDGM AVATGSWDSF LKIWN

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Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Baculovirus expression vector pFastBac1-HM
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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Macromolecule #4: Gastrin-17

MacromoleculeName: Gastrin-17 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 2.098203 KDa
SequenceString:
(PCA)GPWLEEEEE AYGWMD(NFA)

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Macromolecule #5: Gastrin/cholecystokinin type B receptor

MacromoleculeName: Gastrin/cholecystokinin type B receptor / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 50.524922 KDa
Recombinant expressionOrganism: Baculovirus expression vector pFastBac1-HM
SequenceString: DYKDDDDGAP ELLKLNRSVQ GTGPGPGASL CRPGAPLLNS SSVGNLSCEP PRIRGAGTRE LELAIRITLY AVIFLMSVGG NMLIIVVLG LSRRLRTVTN AFLLSLAVSD LLLAVACMPF TLLPNLMGTF IFGTVICKAV SYLMGVSVSV STLSLVAIAL E RYSAICRP ...String:
DYKDDDDGAP ELLKLNRSVQ GTGPGPGASL CRPGAPLLNS SSVGNLSCEP PRIRGAGTRE LELAIRITLY AVIFLMSVGG NMLIIVVLG LSRRLRTVTN AFLLSLAVSD LLLAVACMPF TLLPNLMGTF IFGTVICKAV SYLMGVSVSV STLSLVAIAL E RYSAICRP LQARVWQTRS HAARVIVATW LLSGLLMVPY PVYTVVQPVG PRVLQCVHRW PSARVRQTWS VLLLLLLFFI PG VVMAVAY GLISRELYLG LRFDGDSDSD SQSRVRNQGG LPGAVHQNGR CRPETGAVGE DSDGCYVQLP RSRPALELTA LTA PGPGSG SRPTQAKLLA KKRVVRMLLV IVVLFFLCWL PVYSANTWRA FDGPGAHRAL SGAPISFIHL LSYASACVNP LVYC FMHRR FRQACLETCA RCCPRPPRAR PREFLEVLFQ GPWSHPQFEK GGGSGGGSGG SAWSHPQFEK

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 1.75 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 1338153
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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