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- PDB-8i9a: Structure of EP54-C3aR-Gq complex -

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Basic information

Entry
Database: PDB / ID: 8i9a
TitleStructure of EP54-C3aR-Gq complex
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Antibody fragment - ScFv16
  • C3a anaphylatoxin chemotactic receptor
  • EP54 ligand
KeywordsSIGNALING PROTEIN/IMMUNE SYSTEM / GPCR / G protein / SIGNALING PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


complement component C3a receptor activity / complement component C5a receptor activity / complement receptor mediated signaling pathway / positive regulation of neutrophil chemotaxis / blood circulation / azurophil granule membrane / positive regulation of macrophage chemotaxis / positive regulation of vascular endothelial growth factor production / specific granule membrane / Purinergic signaling in leishmaniasis infection ...complement component C3a receptor activity / complement component C5a receptor activity / complement receptor mediated signaling pathway / positive regulation of neutrophil chemotaxis / blood circulation / azurophil granule membrane / positive regulation of macrophage chemotaxis / positive regulation of vascular endothelial growth factor production / specific granule membrane / Purinergic signaling in leishmaniasis infection / Peptide ligand-binding receptors / Regulation of Complement cascade / G protein-coupled receptor activity / calcium-mediated signaling / 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 activation / G protein-coupled acetylcholine receptor signaling pathway / 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 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / positive regulation of angiogenesis / GPER1 signaling / chemotaxis / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / 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 / phospholipase C-activating G protein-coupled receptor signaling pathway / Ca2+ pathway / G alpha (i) signalling events / positive regulation of cytosolic calcium ion concentration / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / cell population proliferation / Ras protein signal transduction / Extra-nuclear estrogen signaling / inflammatory response / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / Neutrophil degranulation / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytoplasm / cytosol
Similarity search - Function
C3a anaphylatoxin chemotactic receptor / Anaphylatoxin chemotactic receptor, C3a/C5a1/C5a2 / Formyl peptide receptor-related / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily / G-protein gamma-like domain / GGL domain / G protein gamma subunit-like motifs ...C3a anaphylatoxin chemotactic receptor / Anaphylatoxin chemotactic receptor, C3a/C5a1/C5a2 / Formyl peptide receptor-related / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily / G-protein gamma-like domain / GGL domain / G protein gamma subunit-like motifs / 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
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 / C3a anaphylatoxin chemotactic receptor
Similarity search - Component
Biological speciesHomo sapiens (human)
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.57 Å
AuthorsYadav, M.K. / Yadav, R. / Maharana, J. / Sarma, P. / Banerjee, R. / Shukla, A.K. / Gati, C.
Funding support India, United Kingdom, 4items
OrganizationGrant numberCountry
Department of Biotechnology (DBT, India)BT/PR29041/BRB/10/1697/2018 India
Wellcome TrustIA/S/20/1/504916 United Kingdom
Science and Engineering Research Board (SERB)SPR/2020/000408 India
Science and Engineering Research Board (SERB)IPA/2020/000405 India
CitationJournal: Cell / Year: 2023
Title: Molecular basis of anaphylatoxin binding, activation, and signaling bias at complement receptors.
Authors: Manish K Yadav / Jagannath Maharana / Ravi Yadav / Shirsha Saha / Parishmita Sarma / Chahat Soni / Vinay Singh / Sayantan Saha / Manisankar Ganguly / Xaria X Li / Samanwita Mohapatra / Sudha ...Authors: Manish K Yadav / Jagannath Maharana / Ravi Yadav / Shirsha Saha / Parishmita Sarma / Chahat Soni / Vinay Singh / Sayantan Saha / Manisankar Ganguly / Xaria X Li / Samanwita Mohapatra / Sudha Mishra / Htet A Khant / Mohamed Chami / Trent M Woodruff / Ramanuj Banerjee / Arun K Shukla / Cornelius Gati /
Abstract: The complement system is a critical part of our innate immune response, and the terminal products of this cascade, anaphylatoxins C3a and C5a, exert their physiological and pathophysiological ...The complement system is a critical part of our innate immune response, and the terminal products of this cascade, anaphylatoxins C3a and C5a, exert their physiological and pathophysiological responses primarily via two GPCRs, C3aR and C5aR1. However, the molecular mechanism of ligand recognition, activation, and signaling bias of these receptors remains mostly elusive. Here, we present nine cryo-EM structures of C3aR and C5aR1 activated by their natural and synthetic agonists, which reveal distinct binding pocket topologies of complement anaphylatoxins and provide key insights into receptor activation and transducer coupling. We also uncover the structural basis of a naturally occurring mechanism to dampen the inflammatory response of C5a via proteolytic cleavage of the terminal arginine and the G-protein signaling bias elicited by a peptide agonist of C3aR identified here. In summary, our study elucidates the innerworkings of the complement anaphylatoxin receptors and should facilitate structure-guided drug discovery to target these receptors in a spectrum of disorders.
History
DepositionFeb 6, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 18, 2023Provider: repository / Type: Initial release
Revision 1.1Nov 1, 2023Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name
Revision 1.2Nov 8, 2023Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Guanine nucleotide-binding protein G(q) subunit alpha
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
G: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
H: Antibody fragment - ScFv16
C: C3a anaphylatoxin chemotactic receptor
D: EP54 ligand


Theoretical massNumber of molelcules
Total (without water)177,2876
Polymers177,2876
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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

#1: Protein Guanine nucleotide-binding protein G(q) subunit alpha


Mass: 43405.168 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 38534.062 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
#3: 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 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P59768

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Antibody / Protein / Protein/peptide , 3 types, 3 molecules HCD

#4: Antibody Antibody fragment - ScFv16


Mass: 26466.486 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Escherichia coli (E. coli)
#5: Protein C3a anaphylatoxin chemotactic receptor / C3AR / C3a-R


Mass: 59808.422 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: C3AR1, AZ3B, C3R1, HNFAG09 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q16581
#6: Protein/peptide EP54 ligand


Mass: 1211.475 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: Chemically synthesized / Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)

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Details

Has ligand of interestY

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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

Component
IDNameTypeEntity IDParent-IDSourceDetails
1Structure of EP54-C3aR-Gq complexCOMPLEXall0MULTIPLE SOURCES
2Guanine nucleotide-binding protein G(q) subunit alphaCOMPLEX#11RECOMBINANT
3Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1COMPLEX#21RECOMBINANT
4Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2COMPLEX#31RECOMBINANT
5Antibody fragment - ScFv16COMPLEX#41RECOMBINANT
6C3a anaphylatoxin chemotactic receptorCOMPLEX#51RECOMBINANT
7EP54 ligandCOMPLEX#61RECOMBINANTChemically synthesized ligand from the C-terminus of complement peptide C5a
Molecular weightExperimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
22Homo sapiens (human)9606
33Homo sapiens (human)9606
44Homo sapiens (human)9606
55Mus musculus (house mouse)10090
66Homo sapiens (human)9606
77Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
22Escherichia coli (E. coli)562
33Spodoptera frugiperda (fall armyworm)7108
44Spodoptera frugiperda (fall armyworm)7108
55Escherichia coli (E. coli)562
66Spodoptera frugiperda (fall armyworm)7108
77Escherichia coli (E. coli)562
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

MicroscopyModel: TFS GLACIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: FEI FALCON IV (4k x 4k) / Num. of real images: 4445
Image scansMovie frames/image: 40

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Processing

SoftwareName: PHENIX / Version: 1.20.1_4487: / Classification: refinement
EM software
IDNameVersionCategory
7Cootmodel fitting
11cryoSPARC4classification
12cryoSPARC43D reconstruction
13PHENIXmodel refinement
CTF correctionType: NONE
Particle selectionNum. of particles selected: 2007547
3D reconstructionResolution: 3.57 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 101400 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingPDB-ID: 8I95

8i95


Accession code: 8I95 / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0088612
ELECTRON MICROSCOPYf_angle_d0.82511727
ELECTRON MICROSCOPYf_dihedral_angle_d6.2991211
ELECTRON MICROSCOPYf_chiral_restr0.0461354
ELECTRON MICROSCOPYf_plane_restr0.0081499

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