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- PDB-7xa3: Cryo-EM structure of the CCL2 bound CCR2-Gi complex -

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Basic information

Entry
Database: PDB / ID: 7xa3
TitleCryo-EM structure of the CCL2 bound CCR2-Gi complex
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • C-C motif chemokine 2
  • Isoform B of C-C chemokine receptor type 2
  • scFv16
KeywordsMEMBRANE PROTEIN / GPCR / CCR2 / Chemokine Receptor / MEMBRNE PROTEIN
Function / homology
Function and homology information


T-helper 17 cell chemotaxis / chemokine (C-C motif) ligand 2 binding / chemokine (C-C motif) ligand 12 binding / negative regulation of eosinophil degranulation / positive regulation of immune complex clearance by monocytes and macrophages / positive regulation of CD8-positive, alpha-beta T cell extravasation / positive regulation of astrocyte chemotaxis / leukocyte adhesion to vascular endothelial cell / chemokine (C-C motif) ligand 7 binding / helper T cell extravasation ...T-helper 17 cell chemotaxis / chemokine (C-C motif) ligand 2 binding / chemokine (C-C motif) ligand 12 binding / negative regulation of eosinophil degranulation / positive regulation of immune complex clearance by monocytes and macrophages / positive regulation of CD8-positive, alpha-beta T cell extravasation / positive regulation of astrocyte chemotaxis / leukocyte adhesion to vascular endothelial cell / chemokine (C-C motif) ligand 7 binding / helper T cell extravasation / chemokine (C-C motif) ligand 2 signaling pathway / positive regulation of thymocyte migration / positive regulation of hematopoietic stem cell migration / monocyte extravasation / CCR2 chemokine receptor binding / regulation of vascular endothelial growth factor production / negative regulation of natural killer cell chemotaxis / negative regulation of type 2 immune response / Beta defensins / positive regulation of monocyte extravasation / regulation of macrophage migration / macrophage migration / positive regulation of leukocyte tethering or rolling / regulation of T cell cytokine production / neutrophil clearance / astrocyte cell migration / chemokine receptor activity / positive regulation of T-helper 1 type immune response / positive regulation of T cell chemotaxis / CCR chemokine receptor binding / positive regulation of apoptotic cell clearance / negative regulation of glial cell apoptotic process / inflammatory response to wounding / ATF4 activates genes in response to endoplasmic reticulum stress / positive regulation of alpha-beta T cell proliferation / positive regulation of glutamate receptor signaling pathway / C-C chemokine receptor activity / negative regulation of adenylate cyclase activity / NFE2L2 regulating inflammation associated genes / chemokine-mediated signaling pathway / C-C chemokine binding / eosinophil chemotaxis / cellular homeostasis / positive regulation of monocyte chemotaxis / negative regulation of vascular endothelial cell proliferation / chemokine activity / Chemokine receptors bind chemokines / dendritic cell chemotaxis / regulation of T cell differentiation / negative regulation of G1/S transition of mitotic cell cycle / positive regulation of macrophage chemotaxis / positive regulation of calcium ion import / chemoattractant activity / macrophage chemotaxis / Interleukin-10 signaling / monocyte chemotaxis / humoral immune response / hemopoiesis / blood vessel remodeling / cellular response to interleukin-1 / positive regulation of endothelial cell apoptotic process / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / cell surface receptor signaling pathway via JAK-STAT / cellular defense response / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / response to prostaglandin E / cellular response to fibroblast growth factor stimulus / G protein-coupled serotonin receptor binding / adenylate cyclase regulator activity / adenylate cyclase-inhibiting serotonin receptor signaling pathway / cytoskeleton organization / sensory perception of pain / homeostasis of number of cells within a tissue / positive regulation of interleukin-2 production / cellular response to forskolin / positive regulation of synaptic transmission, glutamatergic / regulation of mitotic spindle organization / negative regulation of angiogenesis / viral genome replication / animal organ morphogenesis / cell chemotaxis / Regulation of insulin secretion / response to bacterium / positive regulation of cholesterol biosynthetic process / calcium-mediated signaling / G protein-coupled receptor binding / negative regulation of insulin secretion / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / positive regulation of T cell activation / response to peptide hormone / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / cellular response to type II interferon / response to wounding / centriolar satellite / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway
Similarity search - Function
CC chemokine receptor 2 / CC chemokine, conserved site / Small cytokines (intercrine/chemokine) C-C subfamily signature. / Chemokine receptor family / : / Chemokine beta/gamma/delta / Intercrine alpha family (small cytokine C-X-C) (chemokine CXC). / Chemokine interleukin-8-like domain / Chemokine interleukin-8-like superfamily / Small cytokines (intecrine/chemokine), interleukin-8 like ...CC chemokine receptor 2 / CC chemokine, conserved site / Small cytokines (intercrine/chemokine) C-C subfamily signature. / Chemokine receptor family / : / Chemokine beta/gamma/delta / Intercrine alpha family (small cytokine C-X-C) (chemokine CXC). / Chemokine interleukin-8-like domain / Chemokine interleukin-8-like superfamily / Small cytokines (intecrine/chemokine), interleukin-8 like / G-protein alpha subunit, group I / YVTN repeat-like/Quinoprotein amine dehydrogenase / Serpentine type 7TM GPCR chemoreceptor Srsx / 7 Propeller / Methylamine Dehydrogenase; Chain H / 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 / 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. / 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. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / Immunoglobulins / Immunoglobulin-like / Sandwich / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta
Similarity search - Domain/homology
C-C motif chemokine 2 / C-C chemokine receptor type 2 / 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
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsShao, Z. / Tan, Y. / Shen, Q. / Yao, B. / Hou, L. / Qin, J. / Xu, P. / Mao, C. / Chen, L. / Zhang, H. ...Shao, Z. / Tan, Y. / Shen, Q. / Yao, B. / Hou, L. / Qin, J. / Xu, P. / Mao, C. / Chen, L. / Zhang, H. / Shen, D. / Zhang, C. / Li, W. / Du, X. / Li, F. / Chen, Z. / Jiang, Y. / Xu, H.E. / Ying, S. / Ma, H. / Zhang, Y. / Shen, H.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Cell Discov / Year: 2022
Title: Molecular insights into ligand recognition and activation of chemokine receptors CCR2 and CCR3.
Authors: Zhehua Shao / Yangxia Tan / Qingya Shen / Li Hou / Bingpeng Yao / Jiao Qin / Peiyu Xu / Chunyou Mao / Li-Nan Chen / Huibing Zhang / Dan-Dan Shen / Chao Zhang / Weijie Li / Xufei Du / Fei Li ...Authors: Zhehua Shao / Yangxia Tan / Qingya Shen / Li Hou / Bingpeng Yao / Jiao Qin / Peiyu Xu / Chunyou Mao / Li-Nan Chen / Huibing Zhang / Dan-Dan Shen / Chao Zhang / Weijie Li / Xufei Du / Fei Li / Zhi-Hua Chen / Yi Jiang / H Eric Xu / Songmin Ying / Honglei Ma / Yan Zhang / Huahao Shen /
Abstract: Chemokine receptors are a family of G-protein-coupled receptors with key roles in leukocyte migration and inflammatory responses. Here, we present cryo-electron microscopy structures of two human CC ...Chemokine receptors are a family of G-protein-coupled receptors with key roles in leukocyte migration and inflammatory responses. Here, we present cryo-electron microscopy structures of two human CC chemokine receptor-G-protein complexes: CCR2 bound to its endogenous ligand CCL2, and CCR3 in the apo state. The structure of the CCL2-CCR2-G-protein complex reveals that CCL2 inserts deeply into the extracellular half of the transmembrane domain, and forms substantial interactions with the receptor through the most N-terminal glutamine. Extensive hydrophobic and polar interactions are present between both two chemokine receptors and the Gα-protein, contributing to the constitutive activity of these receptors. Notably, complemented with functional experiments, the interactions around intracellular loop 2 of the receptors are found to be conserved and play a more critical role in G-protein activation than those around intracellular loop 3. Together, our findings provide structural insights into chemokine recognition and receptor activation, shedding lights on drug design targeting chemokine receptors.
History
DepositionMar 17, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 24, 2022Provider: repository / Type: Initial release
Revision 1.0Aug 24, 2022Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Aug 24, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Aug 24, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Aug 24, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Aug 24, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Nov 20, 2024Group: Data collection / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update
Revision 1.2Jun 18, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
Revision 1.1Jun 18, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
R: Isoform B of C-C chemokine receptor type 2
L: C-C motif chemokine 2
A: Guanine nucleotide-binding protein G(i) subunit alpha-1
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
C: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
E: scFv16


Theoretical massNumber of molelcules
Total (without water)164,2916
Polymers164,2916
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 2 types, 2 molecules RL

#1: Protein Isoform B of C-C chemokine receptor type 2 / C-C CKR-2 / CC-CKR-2 / CCR-2 / CCR2 / Monocyte chemoattractant protein 1 receptor / MCP-1-R


Mass: 41104.332 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CCR2, CMKBR2 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P41597
#2: Protein C-C motif chemokine 2 / HC11 / Monocyte chemoattractant protein 1 / Monocyte chemotactic and activating factor / MCAF / ...HC11 / Monocyte chemoattractant protein 1 / Monocyte chemotactic and activating factor / MCAF / Monocyte chemotactic protein 1 / MCP-1 / Monocyte secretory protein JE / Small-inducible cytokine A2


Mass: 7913.181 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CCL2, MCP1, SCYA2 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P13500

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Guanine nucleotide-binding protein ... , 3 types, 3 molecules ABC

#3: Protein Guanine nucleotide-binding protein G(i) subunit alpha-1 / Adenylate cyclase-inhibiting G alpha protein


Mass: 40445.059 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAI1 / Cell (production host): SF9 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P63096
#4: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 39597.230 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
#5: 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 / Cell (production host): SF9 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P59768

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Antibody , 1 types, 1 molecules E

#6: Antibody scFv16


Mass: 27370.510 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Spodoptera frugiperda (fall armyworm)

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Details

Has protein modificationY

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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

ComponentName: Cryo-EM structure of the apo CCR3-Gi complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
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 FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 62 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 142391 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0059824
ELECTRON MICROSCOPYf_angle_d0.84413298
ELECTRON MICROSCOPYf_dihedral_angle_d11.8325846
ELECTRON MICROSCOPYf_chiral_restr0.0521507
ELECTRON MICROSCOPYf_plane_restr0.0061682

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