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- EMDB-35913: Cryo-EM structure of the 3-OH-C12-bound GPR84 receptor-Gi complex -

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Entry
Database: EMDB / ID: EMD-35913
TitleCryo-EM structure of the 3-OH-C12-bound GPR84 receptor-Gi complex
Map data
Sample
  • Complex: 3-OH-C12-bound GPR84 receptor-Gi complex
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • 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: G-protein coupled receptor 84
    • Protein or peptide: Antibody fragment ScFv16
  • Ligand: (3R)-3-HYDROXYDODECANOIC ACID
KeywordsGPCR / IMMUNE SYSTEM
Function / homology
Function and homology information


urotensin II receptor activity / tertiary granule membrane / neuropeptide signaling pathway / T cell migration / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / specific granule membrane / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding ...urotensin II receptor activity / tertiary granule membrane / neuropeptide signaling pathway / T cell migration / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / specific granule membrane / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding / regulation of mitotic spindle organization / cellular response to forskolin / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / 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-modulating 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 / response to peptide hormone / 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 / GDP binding / 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 / cell cortex / midbody / 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 / receptor complex / G protein-coupled receptor signaling pathway / cell division / lysosomal membrane / GTPase activity / centrosome / Neutrophil degranulation / synapse / protein-containing complex binding / nucleolus / GTP binding / magnesium ion binding / signal transduction / extracellular exosome / nucleoplasm / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
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 ...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 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)/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-1 / G-protein coupled receptor 84
Similarity search - Component
Biological speciesHomo sapiens (human) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.89 Å
AuthorsLiu H / Yin W / Xu HE
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Nat Commun / Year: 2023
Title: Structural insights into ligand recognition and activation of the medium-chain fatty acid-sensing receptor GPR84.
Authors: Heng Liu / Qing Zhang / Xinheng He / Mengting Jiang / Siwei Wang / Xiaoci Yan / Xi Cheng / Yang Liu / Fa-Jun Nan / H Eric Xu / Xin Xie / Wanchao Yin /
Abstract: GPR84 is an orphan class A G protein-coupled receptor (GPCR) that is predominantly expressed in immune cells and plays important roles in inflammation, fibrosis, and metabolism. Here, we present cryo- ...GPR84 is an orphan class A G protein-coupled receptor (GPCR) that is predominantly expressed in immune cells and plays important roles in inflammation, fibrosis, and metabolism. Here, we present cryo-electron microscopy (cryo-EM) structures of Gα protein-coupled human GPR84 bound to a synthetic lipid-mimetic ligand, LY237, or a putative endogenous ligand, a medium-chain fatty acid (MCFA) 3-hydroxy lauric acid (3-OH-C12). Analysis of these two ligand-bound structures reveals a unique hydrophobic nonane tail -contacting patch, which forms a blocking wall to select MCFA-like agonists with the correct length. We also identify the structural features in GPR84 that coordinate the polar ends of LY237 and 3-OH-C12, including the interactions with the positively charged side chain of R172 and the downward movement of the extracellular loop 2 (ECL2). Together with molecular dynamics simulations and functional data, our structures reveal that ECL2 not only contributes to direct ligand binding, but also plays a pivotal role in ligand entry from the extracellular milieu. These insights into the structure and function of GPR84 could improve our understanding of ligand recognition, receptor activation, and Gα-coupling of GPR84. Our structures could also facilitate rational drug discovery against inflammation and metabolic disorders targeting GPR84.
History
DepositionApr 12, 2023-
Header (metadata) releaseJun 21, 2023-
Map releaseJun 21, 2023-
UpdateOct 23, 2024-
Current statusOct 23, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_35913.png

Downloads & links

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Map

FileDownload / File: emd_35913.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

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AxesZ (Sec.)Y (Row.)X (Col.)
0.73 Å/pix.
x 256 pix.
= 186.88 Å		0.73 Å/pix.
x 256 pix.
= 186.88 Å		0.73 Å/pix.
x 256 pix.
= 186.88 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.73 Å
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Histogram (log scale)
Contour LevelBy AUTHOR: 0.15
Minimum - Maximum-1.2998631 - 1.8848932
Average (Standard dev.)0.005556645 (±0.062342923)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 186.88 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_35913_msk_1.map
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Half map: #2

Fileemd_35913_half_map_1.map
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Half map: #1

Fileemd_35913_half_map_2.map
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Sample components

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Entire : 3-OH-C12-bound GPR84 receptor-Gi complex

EntireName: 3-OH-C12-bound GPR84 receptor-Gi complex
Components
  • Complex: 3-OH-C12-bound GPR84 receptor-Gi complex
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • 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: G-protein coupled receptor 84
    • Protein or peptide: Antibody fragment ScFv16
  • Ligand: (3R)-3-HYDROXYDODECANOIC ACID

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Supramolecule #1: 3-OH-C12-bound GPR84 receptor-Gi complex

SupramoleculeName: 3-OH-C12-bound GPR84 receptor-Gi complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)

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

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.414047 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKNTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGAQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHASM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCS TDTKNVQFVF DAVTDVIIKN NLKDCGLF

UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1

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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: 38.146707 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String:
MGSLLQSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWNG SS

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

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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: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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

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Macromolecule #4: G-protein coupled receptor 84

MacromoleculeName: G-protein coupled receptor 84 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 45.13443 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: HHHHHHHHHH MWNSSDANFS CYHESVLGYR YVAVSWGVVV AVTGTVGNVL TLLALAIQPK LRTRFNLLIA NLTLADLLYC TLLQPFSVD TYLHLHWRTG ATFCRVFGLL LFASNSVSIL TLCLIALGRY LLIAHPKLFP QVFSAKGIVL ALVSTWVVGV A SFAPLWPI ...String:
HHHHHHHHHH MWNSSDANFS CYHESVLGYR YVAVSWGVVV AVTGTVGNVL TLLALAIQPK LRTRFNLLIA NLTLADLLYC TLLQPFSVD TYLHLHWRTG ATFCRVFGLL LFASNSVSIL TLCLIALGRY LLIAHPKLFP QVFSAKGIVL ALVSTWVVGV A SFAPLWPI YILVPVVCTC SFDRIRGRPY TTILMGIYFV LGLSSVGIFY CLIHRQVKRA AQALDQYKLR QASIHSNHVA RT DEAMPGR FQELDSRLAS GGPSEGISSE PVSAATTQTL EGDSSEVGDQ INSKRAKQMA EKSPPEASAK AQPIKGARRA PDS SSEFGK VTRMCFAVFL CFALSYIPFL LLNILDARVQ APRVVHMLAA NLTWLNGCIN PVLYAAMNRQ FRQAYGSILK RGPR SFHRL H

UniProtKB: G-protein coupled receptor 84

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Macromolecule #5: Antibody fragment ScFv16

MacromoleculeName: Antibody fragment ScFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 28.813047 KDa
SequenceString: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...String:
DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL KGSLEVLFQG PAAAHHHHHH HH

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Macromolecule #6: (3R)-3-HYDROXYDODECANOIC ACID

MacromoleculeName: (3R)-3-HYDROXYDODECANOIC ACID / type: ligand / ID: 6 / Number of copies: 1 / Formula: HXD
Molecular weightTheoretical: 216.317 Da
Chemical component information

ChemComp-HXD:
(3R)-3-HYDROXYDODECANOIC ACID

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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: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.89 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 213390
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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