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Open data
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Basic information
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Title | Structure of JR14a-C3aR-Gi-scFv16 complex | |||||||||
![]() | NU refine sharp map | |||||||||
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![]() | GPCR / MEMBRANE PROTEIN | |||||||||
Function / homology | ![]() 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 / Purinergic signaling in leishmaniasis infection / specific granule membrane ...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 / Purinergic signaling in leishmaniasis infection / specific granule membrane / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / T cell migration / D2 dopamine receptor binding / response to prostaglandin E / G protein-coupled serotonin receptor binding / adenylate cyclase regulator activity / adenylate cyclase-inhibiting serotonin receptor signaling pathway / cellular response to forskolin / regulation of mitotic spindle organization / Peptide ligand-binding receptors / Regulation of Complement cascade / Regulation of insulin secretion / centriolar satellite / positive regulation of cholesterol biosynthetic process / G protein-coupled receptor binding / calcium-mediated signaling / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / G protein-coupled receptor activity / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / response to peptide hormone / 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 / 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 / G beta:gamma signalling through CDC42 / 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 / positive regulation of angiogenesis / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / chemotaxis / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / GDP binding / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / cellular response to catecholamine stimulus / 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 / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / G protein activity / GTPase binding / Ca2+ pathway / positive regulation of cytosolic calcium ion concentration / retina development in camera-type eye / midbody / cell cortex / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / G alpha (i) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / ciliary basal body / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / inflammatory response / lysosomal membrane / cell division / GTPase activity / synapse / centrosome / Neutrophil degranulation / protein-containing complex binding Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.53 Å | |||||||||
![]() | Kim J / Ko S / Choi H-J | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural insights into small-molecule agonist recognition and activation of complement receptor C3aR. Authors: Jinuk Kim / Saebom Ko / Chulwon Choi / Jungnam Bae / Hyeonsung Byeon / Chaok Seok / Hee-Jung Choi / ![]() Abstract: The complement system plays crucial roles in innate immunity and inflammatory responses. The anaphylatoxin C3a mediates pro-inflammatory and chemotactic functions through the G protein-coupled ...The complement system plays crucial roles in innate immunity and inflammatory responses. The anaphylatoxin C3a mediates pro-inflammatory and chemotactic functions through the G protein-coupled receptor C3aR. While the active structure of the C3a-C3aR-G complex has been determined, the inactive conformation and activation mechanism of C3aR remain elusive. Here we report the cryo-EM structure of ligand-free, G protein-free C3aR, providing insights into its inactive conformation. In addition, we determine the structures of C3aR in complex with the synthetic small-molecule agonist JR14a in two distinct conformational states: a G protein-free intermediate, and a fully active G-bound state. The structure of the active JR14a-bound C3aR reveals that JR14a engages in highly conserved interactions with C3aR, similar to the binding of the C-terminal pentapeptide of C3a, along with JR14a-specific interactions. Structural comparison of C3aR in the apo, intermediate, and fully active states provides novel insights into the conformational landscape and activation mechanism of C3aR and defines a molecular basis explaining its high basal activity. Our results may aid in the rational design of therapeutics targeting complement-related inflammatory disorders. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 230.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 25.2 KB 25.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 13.2 KB | Display | ![]() |
Images | ![]() | 63.3 KB | ||
Filedesc metadata | ![]() | 7.3 KB | ||
Others | ![]() ![]() ![]() | 228.2 MB 226.8 MB 226.8 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 838.8 KB | Display | ![]() |
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Full document | ![]() | 838.4 KB | Display | |
Data in XML | ![]() | 21.9 KB | Display | |
Data in CIF | ![]() | 28.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9ipvMC ![]() 9ipyC ![]() 9isiC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | NU refine sharp map | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.81 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: vop max of the C3aR focused map and...
File | emd_60782_additional_1.map | ||||||||||||
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Annotation | vop max of the C3aR focused map and Gi complex focused map EMD-60784 (C3aR focused) EMD-60783 (G protein focused) | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: half map
File | emd_60782_half_map_1.map | ||||||||||||
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Annotation | half map | ||||||||||||
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Density Histograms |
-Half map: half map
File | emd_60782_half_map_2.map | ||||||||||||
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Annotation | half map | ||||||||||||
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Density Histograms |
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Sample components
-Entire : C3aR-Gi complex
Entire | Name: C3aR-Gi complex |
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Components |
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-Supramolecule #1: C3aR-Gi complex
Supramolecule | Name: C3aR-Gi complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 140 kDa/nm |
-Macromolecule #1: Guanine nucleotide-binding protein G(i) subunit alpha-1
Macromolecule | Name: Guanine nucleotide-binding protein G(i) subunit alpha-1 type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 40.415031 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGGQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCA TDTKNVQFVF DAVTDVIIKN NLKDCGLF UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1 |
-Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Macromolecule | Name: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 type: protein_or_peptide / ID: 2 Details: GPGSSGS : HRV 3C protease site (LEVLFQ / GP) + N-terminal linker (GSSGS) Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 37.728152 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String: GPGSSGSELD 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 WDSFLKIWN UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Macromolecule | Name: 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 |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 7.861143 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-Macromolecule #4: C3a anaphylatoxin chemotactic receptor
Macromolecule | Name: C3a anaphylatoxin chemotactic receptor / type: protein_or_peptide / ID: 4 Details: DYKDDDDASID : Expression tag ASLEVLF (483-490) : remaining HRV-3C Protease site Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 56.049109 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: DYKDDDDASI DMASFSAETN STDLLSQPWN EPPVILSMVI LSLTFLLGLP GNGLVLWVAG LKMQRTVNTI WFLHLTLADL LCCLSLPFS LAHLALQGQW PYGRFLCKLI PSIIVLNMFA SVFLLTAISL DRCLVVFKPI WCQNHRNVGM ACSICGCIWV V AFVMCIPV ...String: DYKDDDDASI DMASFSAETN STDLLSQPWN EPPVILSMVI LSLTFLLGLP GNGLVLWVAG LKMQRTVNTI WFLHLTLADL LCCLSLPFS LAHLALQGQW PYGRFLCKLI PSIIVLNMFA SVFLLTAISL DRCLVVFKPI WCQNHRNVGM ACSICGCIWV V AFVMCIPV FVYREIFTTD NHNRCGYKFG LSSSLDYPDF YGDPLENRSL ENIVQPPGEM NDRLDPSSFQ TNDHPWTVPT VF QPQTFQR PSADSLPRGS ARLTSQNLYS NVFKPADVVS PKIPSGFPIE DHETSPLDNS DAFLSTHLKL FPSASSNSFY ESE LPQGFQ DYYNLGQFTD DDQVPTPLVA ITITRLVVGF LLPSVIMIAC YSFIVFRMQR GRFAKSQSKT FRVAVVVVAV FLVC WTPYH IFGVLSLLTD PETPLGKTLM SWDHVCIALA SANSCFNPFL YALLGKDFRK KARQSIQGIL EAAFSEELTR STHCP SNNV ISERNSTTVA SLEVLFQ UniProtKB: C3a anaphylatoxin chemotactic receptor |
-Macromolecule #5: scfv16
Macromolecule | Name: scfv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 27.784896 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: 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 KAAAHHHHHH HH |
-Macromolecule #6: (2~{S})-5-[bis(azanyl)methylideneamino]-2-[[5-[bis(4-chlorophenyl...
Macromolecule | Name: (2~{S})-5-[bis(azanyl)methylideneamino]-2-[[5-[bis(4-chlorophenyl)methyl]-3-methyl-thiophen-2-yl]carbonylamino]pentanoic acid type: ligand / ID: 6 / Number of copies: 1 / Formula: A1D9A |
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Molecular weight | Theoretical: 533.47 Da |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 8 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | TFS KRIOS |
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Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.9 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |