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- EMDB-65997: Cryo-EM structure of GPR84-Gi complex with DL-175 (Gi focus) -

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Basic information

Entry
Database: EMDB / ID: EMD-65997
TitleCryo-EM structure of GPR84-Gi complex with DL-175 (Gi focus)
Map datamap
Sample
  • Complex: GPR84 with antagonist
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
KeywordsGPCR / SIGNALING PROTEIN / MEMBRANE PROTEIN
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsSuzuki S / Nishikawa K / Tran DP / Akio K / Fujiyoshi Y
Funding support Japan, 2 items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS)JP24K18061 Japan
Japan Society for the Promotion of Science (JSPS)20H00451 Japan
CitationJournal: Nat Commun / Year: 2026
Title: Mechanistic insight into signal bias by the agonist-dependent conformational dynamics of GPR84.
Authors: Shota Suzuki / Duy Phuoc Tran / Kouki Nishikawa / Akio Kitao / Yoshinori Fujiyoshi /
Abstract: GPR84 is an orphan class A GPCR primarily expressed in immune cells, where it plays key roles in inflammation and metabolism. Here, we present the cryo-electron microscopy structures of the GPR84-Gi ...GPR84 is an orphan class A GPCR primarily expressed in immune cells, where it plays key roles in inflammation and metabolism. Here, we present the cryo-electron microscopy structures of the GPR84-Gi complex bound to the G protein-biased agonist DL-175, and the inactive state of GPR84 bound to the antagonist GLPG1205. Combined with signaling assays and molecular dynamics simulations, these structures elucidate the conformational landscape spanning the inactive and G protein-biased active states of GPR84, providing a mechanistic basis for biased agonism. Notably, steric interactions between DL-175 and L336 selectively preclude the conformational changes required for efficient β-arrestin recruitment without compromising G protein activation. These structural insights provide a structural context for the rational design of GPR84-targeted therapeutics with precisely tuned signaling profiles.
History
DepositionAug 28, 2025-
Header (metadata) releaseJul 1, 2026-
Map releaseJul 1, 2026-
UpdateJul 29, 2026-
Current statusJul 29, 2026Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_65997.png

Downloads & links

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Map

FileDownload / File: emd_65997.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationmap
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AxesZ (Sec.)Y (Row.)X (Col.)
1.01 Å/pix.
x 256 pix.
= 257.28 Å		1.01 Å/pix.
x 256 pix.
= 257.28 Å		1.01 Å/pix.
x 256 pix.
= 257.28 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.005 Å
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Histogram (log scale)
Contour LevelBy AUTHOR: 0.3
Minimum - Maximum-1.6448877 - 1.9398022
Average (Standard dev.)-0.00037959122 (±0.03485775)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 257.28 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_65997_msk_1.map
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Half map: A

Fileemd_65997_half_map_1.map
AnnotationA
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Half map: B

Fileemd_65997_half_map_2.map
AnnotationB
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Sample components

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Entire : GPR84 with antagonist

EntireName: GPR84 with antagonist
Components
  • Complex: GPR84 with antagonist
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1

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Supramolecule #1: GPR84 with antagonist

SupramoleculeName: GPR84 with antagonist / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
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 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
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

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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

Concentration10 mg/mL
BufferpH: 7.4
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 298 K
DetailsThis sample was monodisperse

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Electron microscopy

MicroscopeJEOL CRYO ARM 300
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 63.4 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

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 159829
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: OTHER
FSC plot (resolution estimation)

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