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- PDB-7yer: The structure of EBOV L-VP35 complex -

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Basic information

Entry
Database: PDB / ID: 7yer
TitleThe structure of EBOV L-VP35 complex
Components
  • Polymerase cofactor VP35
  • RNA-directed RNA polymerase L
KeywordsVIRAL PROTEIN / polymerase / complex
Function / homology
Function and homology information


GDP polyribonucleotidyltransferase / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF7 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IKBKE activity / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / Transferases; Transferring one-carbon groups; Methyltransferases / virion component / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / symbiont-mediated suppression of host toll-like receptor signaling pathway / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / host cell cytoplasm ...GDP polyribonucleotidyltransferase / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF7 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IKBKE activity / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / Transferases; Transferring one-carbon groups; Methyltransferases / virion component / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / symbiont-mediated suppression of host toll-like receptor signaling pathway / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / host cell cytoplasm / RNA-directed RNA polymerase / RNA-dependent RNA polymerase activity / GTPase activity / ATP binding / cytoplasm
Similarity search - Function
RNA-directed RNA polymerase L, filovirus / Filoviruses VP35 interferon inhibitory domain, beta-sheet subdomain / Filoviridae VP35 protein / Filoviruses VP35 interferon inhibitory domain / Filoviruses VP35 interferon inhibitory domain, helical subdomain / Filoviridae VP35 / Filoviruses VP35 interferon inhibitory domain profile. / Mononegavirales RNA-directed RNA polymerase catalytic domain / Mononegavirus L protein 2-O-ribose methyltransferase / Mononegavirales mRNA-capping domain V ...RNA-directed RNA polymerase L, filovirus / Filoviruses VP35 interferon inhibitory domain, beta-sheet subdomain / Filoviridae VP35 protein / Filoviruses VP35 interferon inhibitory domain / Filoviruses VP35 interferon inhibitory domain, helical subdomain / Filoviridae VP35 / Filoviruses VP35 interferon inhibitory domain profile. / Mononegavirales RNA-directed RNA polymerase catalytic domain / Mononegavirus L protein 2-O-ribose methyltransferase / Mononegavirales mRNA-capping domain V / RNA-directed RNA polymerase L, C-terminal / Mononegavirales RNA dependent RNA polymerase / Mononegavirales mRNA-capping region V / RdRp of negative ssRNA viruses with non-segmented genomes catalytic domain profile. / Mononegavirus L protein 2'-O-ribose methyltransferase domain profile.
Similarity search - Domain/homology
RNA-directed RNA polymerase L / Polymerase cofactor VP35
Similarity search - Component
Biological speciesEbola virus
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å
AuthorsShi, Y. / Yuan, B. / Peng, Q.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Nature / Year: 2022
Title: Structure of the Ebola virus polymerase complex.
Authors: Bin Yuan / Qi Peng / Jinlong Cheng / Min Wang / Jin Zhong / Jianxun Qi / George F Gao / Yi Shi /
Abstract: Filoviruses, including Ebola virus, pose an increasing threat to the public health. Although two therapeutic monoclonal antibodies have been approved to treat the Ebola virus disease, there are no ...Filoviruses, including Ebola virus, pose an increasing threat to the public health. Although two therapeutic monoclonal antibodies have been approved to treat the Ebola virus disease, there are no approved broadly reactive drugs to control diverse filovirus infection. Filovirus has a large polymerase (L) protein and the cofactor viral protein 35 (VP35), which constitute the basic functional unit responsible for virus genome RNA synthesis. Owing to its conservation, the L-VP35 polymerase complex is a promising target for broadly reactive antiviral drugs. Here we determined the structure of Ebola virus L protein in complex with tetrameric VP35 using cryo-electron microscopy (state 1). Structural analysis revealed that Ebola virus L possesses a filovirus-specific insertion element that is essential for RNA synthesis, and that VP35 interacts extensively with the N-terminal region of L by three protomers of the VP35 tetramer. Notably, we captured the complex structure in a second conformation with the unambiguous priming loop and supporting helix away from polymerase active site (state 2). Moreover, we demonstrated that the century-old drug suramin could inhibit the activity of the Ebola virus polymerase in an enzymatic assay. The structure of the L-VP35-suramin complex reveals that suramin can bind at the highly conserved NTP entry channel to prevent substrates from entering the active site. These findings reveal the mechanism of Ebola virus replication and may guide the development of more powerful anti-filovirus drugs.
History
DepositionJul 6, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 5, 2022Provider: repository / Type: Initial release
Revision 1.1Oct 12, 2022Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name
Revision 1.2Oct 26, 2022Group: Database references / Structure summary / Category: audit_author / citation / citation_author
Item: _audit_author.name / _citation.journal_volume ..._audit_author.name / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.3Jul 3, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond / em_admin / Item: _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: RNA-directed RNA polymerase L
B: Polymerase cofactor VP35
C: Polymerase cofactor VP35
D: Polymerase cofactor VP35
E: Polymerase cofactor VP35
hetero molecules


Theoretical massNumber of molelcules
Total (without water)402,8876
Polymers402,8215
Non-polymers651
Water00
1


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

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Components

#1: Protein RNA-directed RNA polymerase L / Protein L / Large structural protein / Replicase / Transcriptase


Mass: 252863.734 Da / Num. of mol.: 1 / Mutation: G759D
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Ebola virus
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: A0A1C4HDB0
#2: Protein
Polymerase cofactor VP35


Mass: 37489.430 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Ebola virus / Gene: VP35
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: A0A1C4HDK9
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
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: The complex of EBOV L-VP35 / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Ebola virus
Source (recombinant)Organism: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
Buffer solutionpH: 7.8
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: 2600 nm / Nominal defocus min: 1500 nm / Cs: 2.7 mm
Image recordingElectron dose: 30 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 1083293 / Symmetry type: POINT

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