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- PDB-8rk0: HCV E1/E2 homodimer complex, ectodomain -

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Basic information

Entry
Database: PDB / ID: 8rk0
TitleHCV E1/E2 homodimer complex, ectodomain
Components
  • HCV E1
  • HCV E2
KeywordsVIRAL PROTEIN / Hepatitis C virus S52 E1 E2 Homodimer Structure
Function / homology
Function and homology information


host cell mitochondrial membrane / host cell lipid droplet / symbiont-mediated suppression of host TRAF-mediated signal transduction / transformation of host cell by virus / symbiont-mediated perturbation of host cell cycle G1/S transition checkpoint / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / ribonucleoside triphosphate phosphatase activity / lipid droplet / channel activity ...host cell mitochondrial membrane / host cell lipid droplet / symbiont-mediated suppression of host TRAF-mediated signal transduction / transformation of host cell by virus / symbiont-mediated perturbation of host cell cycle G1/S transition checkpoint / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / ribonucleoside triphosphate phosphatase activity / lipid droplet / channel activity / monoatomic ion transmembrane transport / viral nucleocapsid / clathrin-dependent endocytosis of virus by host cell / RNA helicase activity / host cell perinuclear region of cytoplasm / host cell endoplasmic reticulum membrane / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / ribonucleoprotein complex / induction by virus of host autophagy / viral RNA genome replication / cysteine-type endopeptidase activity / serine-type endopeptidase activity / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / fusion of virus membrane with host endosome membrane / viral envelope / host cell nucleus / virion attachment to host cell / apoptotic process / host cell plasma membrane / virion membrane / structural molecule activity / proteolysis / RNA binding / zinc ion binding / ATP binding / membrane / plasma membrane / cytoplasm
Similarity search - Function
: / NS3 RNA helicase, C-terminal helical domain / : / Hepatitis C virus core protein, chain A superfamily / Hepatitus C virus, Non-structural 5a protein, C-terminal / Hepatitis C virus NS5A, 1B domain superfamily / Hepatitis C virus non-structural protein NS2, C-terminal domain / Hepatitis C virus non-structural protein NS2, N-terminal domain / Hepatitis C virus non-structural protein NS2 / HCV NS5a protein C-terminal region ...: / NS3 RNA helicase, C-terminal helical domain / : / Hepatitis C virus core protein, chain A superfamily / Hepatitus C virus, Non-structural 5a protein, C-terminal / Hepatitis C virus NS5A, 1B domain superfamily / Hepatitis C virus non-structural protein NS2, C-terminal domain / Hepatitis C virus non-structural protein NS2, N-terminal domain / Hepatitis C virus non-structural protein NS2 / HCV NS5a protein C-terminal region / Hepatitis C virus, Non-structural protein NS4b / Hepatitis C virus, Core protein, N-terminal / Hepatitis C virus non-structural protein NS4b / Hepatitis C virus capsid protein / Hepatitis C virus, Non-structural protein NS2 / Hepatitis C virus, Non-structural 5a protein / Hepatitis C virus, Non-structural 5a protein, domain 1a / Hepatitis C virus non-structural 5a, 1B domain / NS5A domain 1a superfamily / Hepatitis C virus non-structural 5a protein membrane anchor / Hepatitis C virus non-structural 5a zinc finger domain / Hepatitis C virus non-structural 5a domain 1b / Hepacivirus nonstructural protein 2 (NS2) protease domain profile. / Hepatitis C virus, Non-structural protein NS4a / Hepatitis C virus non-structural protein NS4a / Hepatitis C virus, Core protein, C-terminal / Hepatitis C virus core protein / Hepatitis C virus, Non-structural protein E2/NS1 / Hepatitis C virus non-structural protein E2/NS1 / Hepatitis C virus, Envelope glycoprotein E1 / Hepatitis C virus envelope glycoprotein E1 / RNA dependent RNA polymerase, hepatitis C virus / Viral RNA dependent RNA polymerase / Hepatitis C virus, NS3 protease, Peptidase S29 / Hepatitis C virus NS3 protease / Hepacivirus/Pegivirus NS3 protease domain profile. / DEAD box, Flavivirus / Flavivirus DEAD domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / Reverse transcriptase/Diguanylate cyclase domain / RNA-directed RNA polymerase, catalytic domain / RdRp of positive ssRNA viruses catalytic domain profile. / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan / DNA/RNA polymerase superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Genome polyprotein / Genome polyprotein
Similarity search - Component
Biological speciesHepacivirus hominis
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.38 Å
AuthorsAugestad, E.H. / Olesen, C.H. / Groenberg, C. / Soerensen, A. / Velazquez-Moctezuma, R. / Fanalista, M. / Bukh, J. / Wang, K. / Gourdon, P. / Prentoe, J.
Funding support Denmark, 2items
OrganizationGrant numberCountry
LundbeckfondenR324-2019-1375 Denmark
Novo Nordisk FoundationNNF20SA0064340 Denmark
CitationJournal: Nature / Year: 2024
Title: The hepatitis C virus envelope protein complex is a dimer of heterodimers.
Authors: Elias Honerød Augestad / Christina Holmboe Olesen / Christina Grønberg / Andreas Soerensen / Rodrigo Velázquez-Moctezuma / Margherita Fanalista / Jens Bukh / Kaituo Wang / Pontus Gourdon ...Authors: Elias Honerød Augestad / Christina Holmboe Olesen / Christina Grønberg / Andreas Soerensen / Rodrigo Velázquez-Moctezuma / Margherita Fanalista / Jens Bukh / Kaituo Wang / Pontus Gourdon / Jannick Prentoe /
Abstract: Fifty-eight million individuals worldwide are affected by chronic hepatitis C virus (HCV) infection, a primary driver of liver cancer for which no vaccine is available. The HCV envelope proteins E1 ...Fifty-eight million individuals worldwide are affected by chronic hepatitis C virus (HCV) infection, a primary driver of liver cancer for which no vaccine is available. The HCV envelope proteins E1 and E2 form a heterodimer (E1/E2), which is the target for neutralizing antibodies. However, the higher-order organization of these E1/E2 heterodimers, as well as that of any Hepacivirus envelope protein complex, remains unknown. Here we determined the cryo-electron microscopy structure of two E1/E2 heterodimers in a homodimeric arrangement. We reveal how the homodimer is established at the molecular level and provide insights into neutralizing antibody evasion and membrane fusion by HCV, as orchestrated by E2 motifs such as hypervariable region 1 and antigenic site 412, as well as the organization of the transmembrane helices, including two internal to E1. This study addresses long-standing questions on the higher-order oligomeric arrangement of Hepacivirus envelope proteins and provides a critical framework in the design of novel HCV vaccine antigens.
History
DepositionDec 22, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 4, 2024Provider: repository / Type: Initial release
Revision 1.1Sep 18, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name / _em_admin.last_update
Revision 1.2Oct 2, 2024Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
C: HCV E1
D: HCV E2
A: HCV E1
B: HCV E2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)108,73724
Polymers99,3584
Non-polymers9,37920
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein HCV E1


Mass: 13212.862 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Hepacivirus hominis / Strain: S52 / Gene: E1 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: Q81424
#2: Protein HCV E2


Mass: 36466.168 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Hepacivirus hominis / Strain: S52 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: A9YFN8
#3: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 10
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#4: Polysaccharide
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}LINUCSPDB-CARE
#5: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
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

ComponentName: HCV S52 E1E2 / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.2 MDa / Experimental value: NO
Source (natural)Organism: Hepacivirus hominis
Source (recombinant)Organism: Homo sapiens (human) / Cell: HEK293
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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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: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm / Alignment procedure: BASIC
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 13555
Image scansWidth: 4092 / Height: 5760

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Processing

EM software
IDNameVersionCategory
2EPUimage acquisition
4cryoSPARCv3.3.1CTF correction
7UCSF Chimeramodel fitting
9PHENIXmodel refinement
10cryoSPARCv 3.3.1initial Euler assignment
11cryoSPARCv 3.3.1final Euler assignment
13cryoSPARCv 3.3.13D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.38 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 105033 / Symmetry type: POINT
Atomic model buildingB value: 100 / Protocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingSource name: AlphaFold / Type: in silico model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0037138
ELECTRON MICROSCOPYf_angle_d0.7819756
ELECTRON MICROSCOPYf_dihedral_angle_d12.8531190
ELECTRON MICROSCOPYf_chiral_restr0.051185
ELECTRON MICROSCOPYf_plane_restr0.0061192

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