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- EMDB-33633: Cryo-EM structure of C5a-bound C5aR1 in complex with Gi protein -

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Entry
Database: EMDB / ID: EMD-33633
TitleCryo-EM structure of C5a-bound C5aR1 in complex with Gi protein
Map data
Sample
  • Complex: C5a-bound C5aR1 in complex with Gi heterotrimer
    • Complex: Gi heterotrimer
      • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: scFV16
      • Protein or peptide: scFV16
    • Complex: C5a-bound C5aR1
      • Protein or peptide: C5a anaphylatoxin chemotactic receptor 1
      • Protein or peptide: C5a anaphylatoxin
Function / homology
Function and homology information


complement component C5a signaling pathway / presynapse organization / regulation of tau-protein kinase activity / complement component C5a receptor activity / response to peptidoglycan / Terminal pathway of complement / membrane attack complex / sensory perception of chemical stimulus / complement receptor mediated signaling pathway / Activation of C3 and C5 ...complement component C5a signaling pathway / presynapse organization / regulation of tau-protein kinase activity / complement component C5a receptor activity / response to peptidoglycan / Terminal pathway of complement / membrane attack complex / sensory perception of chemical stimulus / complement receptor mediated signaling pathway / Activation of C3 and C5 / negative regulation of macrophage chemotaxis / positive regulation of neutrophil chemotaxis / complement activation, alternative pathway / chemokine activity / endopeptidase inhibitor activity / positive regulation of macrophage chemotaxis / amyloid-beta clearance / activation of phospholipase C activity / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / positive regulation of vascular endothelial growth factor production / regulation of cAMP-mediated signaling / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding / cellular defense response / complement activation, classical pathway / regulation of mitotic spindle organization / positive regulation of chemokine production / cellular response to forskolin / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / Peptide ligand-binding receptors / neutrophil chemotaxis / secretory granule membrane / Regulation of insulin secretion / positive regulation of epithelial cell proliferation / G protein-coupled receptor activity / Regulation of Complement cascade / G protein-coupled receptor binding / astrocyte activation / microglial cell activation / Olfactory Signaling Pathway / G-protein beta/gamma-subunit complex binding / Activation of the phototransduction cascade / mRNA transcription by RNA polymerase II / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / 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 / response to peptide hormone / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / cognition / 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 / adenylate cyclase-activating dopamine receptor signaling pathway / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / sensory perception of taste / GPER1 signaling / G-protein beta-subunit binding / GDP binding / positive regulation of angiogenesis / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / chemotaxis / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / apical part of cell / GTPase binding / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / cell cortex / midbody / G alpha (i) signalling events / positive regulation of cytosolic calcium ion concentration / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / basolateral plasma membrane / killing of cells of another organism
Similarity search - Function
Anaphylatoxin chemotactic receptor, C3a/C5a1/C5a2 / : / Complement component 5, CUB domain / Formyl peptide receptor-related / Complement C3/4/5, macroglobulin domain MG1 / Macroglobulin domain MG1 / Anaphylatoxin, complement system domain / Anaphylatoxin domain signature. / Anaphylatoxin/fibulin / Anaphylatoxin, complement system ...Anaphylatoxin chemotactic receptor, C3a/C5a1/C5a2 / : / Complement component 5, CUB domain / Formyl peptide receptor-related / Complement C3/4/5, macroglobulin domain MG1 / Macroglobulin domain MG1 / Anaphylatoxin, complement system domain / Anaphylatoxin domain signature. / Anaphylatoxin/fibulin / Anaphylatoxin, complement system / Anaphylotoxin-like domain / Anaphylatoxin domain profile. / Anaphylatoxin homologous domain / Netrin C-terminal Domain / Netrin module, non-TIMP type / UNC-6/NTR/C345C module / Alpha-macroglobulin, receptor-binding / Alpha-macroglobulin, receptor-binding domain superfamily / Macroglobulin domain MG4 / Macroglobulin domain MG3 / A-macroglobulin receptor binding domain / Macroglobulin domain MG4 / Macroglobulin domain MG3 / A-macroglobulin receptor / Netrin domain / NTR domain profile. / Tissue inhibitor of metalloproteinases-like, OB-fold / Alpha-2-macroglobulin / Macroglobulin domain / Alpha-2-macroglobulin, bait region domain / Alpha-macroglobulin-like, TED domain / Alpha-2-macroglobulin family / MG2 domain / A-macroglobulin TED domain / Alpha-2-macroglobulin bait region domain / Alpha-2-Macroglobulin / Alpha-2-macroglobulin family / Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid / G-protein alpha subunit, group I / G-alpha domain profile. / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G protein alpha subunit / 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. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / Immunoglobulin-like fold / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Complement C5 / C5a anaphylatoxin chemotactic receptor 1 / 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) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsFeng YY / Zhao C / Yan W / Shao ZH
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31972916 China
CitationJournal: Cell Res / Year: 2023
Title: Mechanism of activation and biased signaling in complement receptor C5aR1.
Authors: Yuying Feng / Chang Zhao / Yue Deng / Heli Wang / Liang Ma / Sicen Liu / Xiaowen Tian / Bo Wang / Yan Bin / Peipei Chen / Wei Yan / Ping Fu / Zhenhua Shao /
Abstract: The complement system plays an important role in the innate immune response to invading pathogens. The complement fragment C5a is one of its important effector components and exerts diverse ...The complement system plays an important role in the innate immune response to invading pathogens. The complement fragment C5a is one of its important effector components and exerts diverse physiological functions through activation of the C5a receptor 1 (C5aR1) and associated downstream G protein and β-arrestin signaling pathways. Dysfunction of the C5a-C5aR1 axis is linked to numerous inflammatory and immune-mediated diseases, but the structural basis for activation and biased signaling of C5aR1 remains elusive. Here, we present cryo-electron microscopy structures of the activated wild-type C5aR1-G protein complex bound to each of the following: C5a, the hexapeptidic agonist C5a, and the G protein-biased agonist BM213. The structures reveal the landscape of the C5a-C5aR1 interaction as well as a common motif for the recognition of diverse orthosteric ligands. Moreover, combined with mutagenesis studies and cell-based pharmacological assays, we deciphered a framework for biased signaling using different peptide analogs and provided insight into the activation mechanism of C5aR1 by solving the structure of C5aR1 mutant-G signaling activation complex induced by C089, which exerts antagonism on wild-type C5aR1. In addition, unusual conformational changes in the intracellular end of transmembrane domain 7 and helix 8 upon agonist binding suggest a differential signal transduction process. Collectively, our study provides mechanistic understanding into the ligand recognition, biased signaling modulation, activation, and G protein coupling of C5aR1, which may facilitate the future design of therapeutic agents.
History
DepositionJun 18, 2022-
Header (metadata) releaseMar 1, 2023-
Map releaseMar 1, 2023-
UpdateApr 19, 2023-
Current statusApr 19, 2023Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_33633.png

Downloads & links

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Map

FileDownload / File: emd_33633.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.85 Å
Density
Contour LevelBy AUTHOR: 0.138
Minimum - Maximum-0.020868734 - 1.7019279
Average (Standard dev.)0.0019840717 (±0.03092522)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 217.6 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_33633_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_33633_half_map_2.map
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Sample components

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Entire : C5a-bound C5aR1 in complex with Gi heterotrimer

EntireName: C5a-bound C5aR1 in complex with Gi heterotrimer
Components
  • Complex: C5a-bound C5aR1 in complex with Gi heterotrimer
    • Complex: Gi heterotrimer
      • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: scFV16
      • Protein or peptide: scFV16
    • Complex: C5a-bound C5aR1
      • Protein or peptide: C5a anaphylatoxin chemotactic receptor 1
      • Protein or peptide: C5a anaphylatoxin

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Supramolecule #1: C5a-bound C5aR1 in complex with Gi heterotrimer

SupramoleculeName: C5a-bound C5aR1 in complex with Gi heterotrimer / type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: all

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Supramolecule #2: Gi heterotrimer

SupramoleculeName: Gi heterotrimer / type: complex / ID: 2 / Chimera: Yes / Parent: 1 / Macromolecule list: #1-#3
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: scFV16

SupramoleculeName: scFV16 / type: complex / ID: 3 / Chimera: Yes / Parent: 1 / Macromolecule list: #4
Source (natural)Organism: Mus musculus (house mouse)

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Supramolecule #4: C5a-bound C5aR1

SupramoleculeName: C5a-bound C5aR1 / type: complex / ID: 4 / Chimera: Yes / Parent: 1 / Macromolecule list: #5-#6
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 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.415031 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: 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

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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: 39.141793 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MHHHHLEVLF QGPGSSGSEL DQLRQEAEQL KNQIRDARKA CADATLSQIT NNIDPVGRIQ MRTRRTLRGH LAKIYAMHWG TDSRLLVSA SQDGKLIIWD SYTTNKVHAI PLRSSWVMTC AYAPSGNYVA CGGLDNICSI YNLKTREGNV RVSRELAGHT G YLSCCRFL ...String:
MHHHHLEVLF QGPGSSGSEL DQLRQEAEQL KNQIRDARKA CADATLSQIT NNIDPVGRIQ MRTRRTLRGH LAKIYAMHWG TDSRLLVSA SQDGKLIIWD SYTTNKVHAI PLRSSWVMTC AYAPSGNYVA CGGLDNICSI YNLKTREGNV RVSRELAGHT G YLSCCRFL DDNQIVTSSG DTTCALWDIE TGQQTTTFTG HTGDVMSLSL APDTRLFVSG ACDASAKLWD VREGMCRQTF TG HESDINA ICFFPNGNAF ATGSDDATCR LFDLRADQEL MTYSHDNIIC GITSVSFSKS GRLLLAGYDD FNCNVWDALK ADR AGVLAG HDNRVSCLGV TDDGMAVATG SWDSFLKIWN

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Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: 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
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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Macromolecule #4: scFV16

MacromoleculeName: scFV16 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 28.636793 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: 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 KAAAENLYFQ GHHHHHHHH

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Macromolecule #5: C5a anaphylatoxin chemotactic receptor 1

MacromoleculeName: C5a anaphylatoxin chemotactic receptor 1 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 38.415238 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MDSFNYTTPD YGHYDDKDTL DLNTPVDKTS NTLRVPDILA LVIFAVVFLV GVLGNALVVW VTAFEAKRTI NAIWFLNLAV ADFLSCLAL PILFTSIVQH HHWPFGGAAC SILPSLILLN MYASILLLAT ISADRFLLVF KPIWCQNFRG AGLAWIACAV A WGLALLLT ...String:
MDSFNYTTPD YGHYDDKDTL DLNTPVDKTS NTLRVPDILA LVIFAVVFLV GVLGNALVVW VTAFEAKRTI NAIWFLNLAV ADFLSCLAL PILFTSIVQH HHWPFGGAAC SILPSLILLN MYASILLLAT ISADRFLLVF KPIWCQNFRG AGLAWIACAV A WGLALLLT IPSFLYRVVR EEYFPPKVLC GVDYSHDKRR ERAVAIVRLV LGFLWPLLTL TICYTFILLR TWSRRATRST KT LKVVVAV VASFFIFWLP YQVTGIMMSF LEPSSPTFLL LKKLDSLCVS FAYINCCINP IIYVVAGQGF QGRLRKSLPS LLR NVLTEE SVVRHHHHHH HHH

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Macromolecule #6: C5a anaphylatoxin

MacromoleculeName: C5a anaphylatoxin / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 8.342727 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
TLQKKIEEIA AKYKHSVVKK CCYDGARVNN DETCEQRAAR ISLGPRCIKA FTECCVVASQ LRANISHKDM QLGR

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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: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.0 µm
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 66.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 623262

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