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- EMDB-63174: Cryo-EM structure of the receptor of PL45-Olfr110-Gs complex -

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Entry
Database: EMDB / ID: EMD-63174
TitleCryo-EM structure of the receptor of PL45-Olfr110-Gs complex
Map data
Sample
  • Complex: Cryo-EM structure of the receptor of PL45-Olfr110-Gs complex
    • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Olfactory receptor
  • Ligand: methyl (9R,10E,12E)-9-methoxyoctadeca-10,12-dienoate
KeywordsOlfr110 / receptor / MEMBRANE PROTEIN
Function / homology
Function and homology information


olfactory receptor activity / detection of chemical stimulus involved in sensory perception of smell / G protein-coupled receptor activity / 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-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels ...olfactory receptor activity / detection of chemical stimulus involved in sensory perception of smell / G protein-coupled receptor activity / 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-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / G beta:gamma signalling through CDC42 / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / photoreceptor disc membrane / Glucagon-type ligand receptors / Sensory perception of sweet, bitter, and umami (glutamate) taste / sensory perception of smell / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / cellular response to catecholamine stimulus / 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 / heterotrimeric G-protein complex / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / extracellular vesicle / sensory perception of taste / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / retina development in camera-type eye / GTPase binding / Ca2+ pathway / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytoplasm / cytosol
Similarity search - Function
: / Olfactory receptor / Olfactory receptor / G protein beta WD-40 repeat protein / 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. ...: / Olfactory receptor / Olfactory receptor / G protein beta WD-40 repeat protein / 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. / 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. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
Olfactory receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Similarity search - Component
Biological speciesMus musculus (house mouse) / synthetic construct (others) / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsRong NK / Zhang MH / Yang F / Sun JP
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)81773704 China
CitationJournal: Cell / Year: 2026
Title: Mechanistic insights into fatty acid odor detection mediated by class II olfactory receptors.
Authors: Xiang Han / Ming-Hui Zhang / Nai-Kang Rong / Kong-Kai Zhu / Yuan Pei / Xiao-Yan Ge / Qi Liu / Huan Lu / Jing Liu / Li-Jun Zhang / Hong-Qiang Bao / Jia-Hao Pi / Lei Fan / Yu Fu / Xu-Hang Shao ...Authors: Xiang Han / Ming-Hui Zhang / Nai-Kang Rong / Kong-Kai Zhu / Yuan Pei / Xiao-Yan Ge / Qi Liu / Huan Lu / Jing Liu / Li-Jun Zhang / Hong-Qiang Bao / Jia-Hao Pi / Lei Fan / Yu Fu / Xu-Hang Shao / Wen-Qi Yan / Xi-He Gao / Ming-Yue Zhang / Lu-Lu Guo / Yan Lu / Shang-Lei Ning / Hua Zhang / Yun-Fei Xu / Xiao-Ya Feng / Jie Cheng / Ming Xia / Qian Li / Xiao Yu / Fan Yang / Jin-Peng Sun /
Abstract: Smell is one of the fundamental senses mediated by thousands of odorant receptors (ORs). How hydrophobic and volatile odor molecules are recognized by class II ORs remains elusive. Here, we present ...Smell is one of the fundamental senses mediated by thousands of odorant receptors (ORs). How hydrophobic and volatile odor molecules are recognized by class II ORs remains elusive. Here, we present cryo-electron microscopy (cryo-EM) structures of class II OR Olfr110 complexed with the unsaturated fatty acid metabolite (UFAM) PL45, Gs, and cons-OR5. The structural study revealed an unusually large hydrophobic pocket accommodating PL45 and the endogenous agonist 12(S)-hydroxyeicosapentaenoic acid (12(S)-HEPE). This pocket is decorated with polar residues and aromatic residue arrays, constituting polar networks and π-π interactions with the natural agonist PL45, respectively. Conserved motifs in the type II OR5 subfamily responsible for ligand recognition are characterized. The inward movement of extracellular loop 3 (ECL3) and an unconventional activation mechanism underlie Olfr110 activation. At the G protein interface, Olfr110 displays common and unique interactions. Overall, we revealed the structural basis of odor recognition and the activation mechanism of class II ORs, which may facilitate drug development targeting these receptors.
History
DepositionJan 16, 2025-
Header (metadata) releaseJan 21, 2026-
Map releaseJan 21, 2026-
UpdateFeb 18, 2026-
Current statusFeb 18, 2026Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_63174.png

Downloads & links

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Map

FileDownload / File: emd_63174.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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AxesZ (Sec.)Y (Row.)X (Col.)
0.92 Å/pix.
x 256 pix.
= 235.52 Å		0.92 Å/pix.
x 256 pix.
= 235.52 Å		0.92 Å/pix.
x 256 pix.
= 235.52 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.92 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.27
Minimum - Maximum-1.6423795 - 2.123562
Average (Standard dev.)-0.0006728883 (±0.041503437)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 235.52 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_63174_half_map_1.map
Projections & Slices
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Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_63174_half_map_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : Cryo-EM structure of the receptor of PL45-Olfr110-Gs complex

EntireName: Cryo-EM structure of the receptor of PL45-Olfr110-Gs complex
Components
  • Complex: Cryo-EM structure of the receptor of PL45-Olfr110-Gs complex
    • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Olfactory receptor
  • Ligand: methyl (9R,10E,12E)-9-methoxyoctadeca-10,12-dienoate

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Supramolecule #1: Cryo-EM structure of the receptor of PL45-Olfr110-Gs complex

SupramoleculeName: Cryo-EM structure of the receptor of PL45-Olfr110-Gs complex
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Mus musculus (house mouse)

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Macromolecule #1: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

MacromoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 41.879465 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RATHRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMIE KQLQKDKQVY RATHRLLLLG ADNSGKSTIV KQMRIYHVNG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTSGIFETK FQVDKVNFHM FDVGAQRDER RKWIQCFNDV TAIIFVVDSS DYNRLQEALN DF KSIWNNR WLRTISVILF LNKQDLLAEK VLAGKSKIED YFPEFARYTT PEDATPEPGE DPRVTRAKYF IRDEFLRIST ASG DGRHYC YPHFTCSVDT ENARRIFNDC RDIIQRMHLR QYELL

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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: 37.41693 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL ...String:
MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL WDIETGQQTT TFTGHTGDVM SLSLAPDTRL FVSGACDASA KLWDVREGMC RQTFTGHESD INAICFFPNG NA FATGSDD ATCRLFDLRA DQELMTYSHD NIICGITSVS FSKSGRLLLA GYDDFNCNVW DALKADRAGV LAGHDNRVSC LGV TDDGMA VATGSWDSFL KIWN

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

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Macromolecule #3: Olfactory receptor

MacromoleculeName: Olfactory receptor / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 35.788172 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MEGKNQTAPS EFIILGFDHL NELQYLLFTI FFLTYICTLG GNVFIIVVTI ADSHLHTPMY YFLGNLALID ICYTTTNVPQ MMVHLLSEK KIISYGGCVT QLFAFIFFVG SECLLLAAMA YDRYIAICKP LRYSFIMNKA LCSWLAASCW TGGFLNSVLH T VLTFHLPF ...String:
MEGKNQTAPS EFIILGFDHL NELQYLLFTI FFLTYICTLG GNVFIIVVTI ADSHLHTPMY YFLGNLALID ICYTTTNVPQ MMVHLLSEK KIISYGGCVT QLFAFIFFVG SECLLLAAMA YDRYIAICKP LRYSFIMNKA LCSWLAASCW TGGFLNSVLH T VLTFHLPF CGNNQINYFF CDIPPLLILS CGDTSLNELA LLSIGILIGW TPFLCVILSY LYIISTILRI RSSEGRHKAF ST CASHLLI VILYYGSAIF TYVRPISSYS LEKDRLISVL YSVVTPMLNP VIYTLRNKDI KEAVKAIGRK WQPPVFSSDI

UniProtKB: Olfactory receptor

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Macromolecule #4: methyl (9R,10E,12E)-9-methoxyoctadeca-10,12-dienoate

MacromoleculeName: methyl (9R,10E,12E)-9-methoxyoctadeca-10,12-dienoate / type: ligand / ID: 4 / Number of copies: 1 / Formula: A1EKK
Molecular weightTheoretical: 324.498 Da

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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: 7.2
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS TALOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 1.875 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: DIFFRACTION / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm

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Image processing

CTF correctionType: NONE
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.1) / Number images used: 168745
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION

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