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- PDB-9fux: Cryo-EM structure of the Nipah virus polymerase (L) bound to the ... -

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Basic information

Entry
Database: PDB / ID: 9fux
TitleCryo-EM structure of the Nipah virus polymerase (L) bound to the tetrameric phosphoprotein (P)
Components
  • Phosphoprotein
  • RNA-directed RNA polymerase L
KeywordsVIRAL PROTEIN / Nipah virus L / Polymerase / Replicase / Transcriptase
Function / homology
Function and homology information


negative stranded viral RNA transcription / NNS virus cap methyltransferase / GDP polyribonucleotidyltransferase / negative stranded viral RNA replication / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / virion component / molecular adaptor activity / host cell cytoplasm / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / symbiont-mediated suppression of host innate immune response ...negative stranded viral RNA transcription / NNS virus cap methyltransferase / GDP polyribonucleotidyltransferase / negative stranded viral RNA replication / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / virion component / molecular adaptor activity / host cell cytoplasm / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / symbiont-mediated suppression of host innate immune response / RNA-directed RNA polymerase / RNA-directed RNA polymerase activity / GTPase activity / ATP binding
Similarity search - Function
Phosphoprotein P region PNT disordered / Phosphoprotein P region PNT disordered / Paramyxovirus structural protein P/V, N-terminal domain / Paramyxovirus structural protein V/P N-terminus / Phosphoprotein P soyouz module / N-terminal region of Paramyxovirinae phosphoprotein (P) / RNA-directed RNA polymerase, paramyxovirus / P/V phosphoprotein, paramyxoviral / Paramyxovirus P/V phosphoprotein C-terminal / Mononegavirus L protein 2-O-ribose methyltransferase ...Phosphoprotein P region PNT disordered / Phosphoprotein P region PNT disordered / Paramyxovirus structural protein P/V, N-terminal domain / Paramyxovirus structural protein V/P N-terminus / Phosphoprotein P soyouz module / N-terminal region of Paramyxovirinae phosphoprotein (P) / RNA-directed RNA polymerase, paramyxovirus / P/V phosphoprotein, paramyxoviral / Paramyxovirus P/V phosphoprotein C-terminal / Mononegavirus L protein 2-O-ribose methyltransferase / RNA-directed RNA polymerase L, C-terminal / Mononegavirus L protein 2'-O-ribose methyltransferase domain profile. / Mononegavirales RNA-directed RNA polymerase catalytic domain / Mononegavirales mRNA-capping domain V / Mononegavirales RNA dependent RNA polymerase / Mononegavirales mRNA-capping region V / RdRp of negative ssRNA viruses with non-segmented genomes catalytic domain profile. / Ribosomal RNA methyltransferase, FtsJ domain / FtsJ-like methyltransferase
Similarity search - Domain/homology
RNA-directed RNA polymerase L / Phosphoprotein
Similarity search - Component
Biological speciesHenipavirus nipahense
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.49 Å
AuthorsBalikci, E. / Gunl, F. / Carrique, L. / Keown, J.R. / Fodor, E. / Grimes, J.M.
Funding support United States, 1items
OrganizationGrant numberCountry
Bill & Melinda Gates FoundationINV-048922 United States
CitationJournal: EMBO J / Year: 2025
Title: Structure of the Nipah virus polymerase complex.
Authors: Esra Balıkçı / Franziska Günl / Loïc Carrique / Jeremy R Keown / Ervin Fodor / Jonathan M Grimes /
Abstract: Nipah virus is a highly virulent zoonotic paramyxovirus causing severe respiratory and neurological disease. Despite its lethality, there is no approved treatment for Nipah virus infection. The viral ...Nipah virus is a highly virulent zoonotic paramyxovirus causing severe respiratory and neurological disease. Despite its lethality, there is no approved treatment for Nipah virus infection. The viral polymerase complex, composed of the polymerase (L) and phosphoprotein (P), replicates and transcribes the viral RNA genome. Here, we describe structures of the Nipah virus L-P polymerase complex and the L-protein's Connecting Domain (CD). The cryo-electron microscopy L-P complex structure reveals the organization of the RNA-dependent RNA polymerase (RdRp) and polyribonucleotidyl transferase (PRNTase) domains of the L-protein, and shows how the P-protein, which forms a tetramer, interacts with the RdRp-domain of the L-protein. The crystal structure of the CD-domain alone reveals binding of three Mg ions. Modelling of this domain onto an AlphaFold 3 model of an RNA-L-P complex suggests a catalytic role for one Mg ion in mRNA capping. These findings offer insights into the structural details of the L-P polymerase complex and the molecular interactions between L-protein and P-protein, shedding light on the mechanisms of the replication machinery. This work will underpin efforts to develop antiviral drugs that target the polymerase complex of Nipah virus.
History
DepositionJun 26, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jan 8, 2025Provider: repository / Type: Initial release
Revision 1.1Jan 22, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.year / _citation_author.identifier_ORCID / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: RNA-directed RNA polymerase L
C: Phosphoprotein
D: Phosphoprotein
E: Phosphoprotein
F: Phosphoprotein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)570,6017
Polymers570,4705
Non-polymers1312
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 RNA-directed RNA polymerase L / Protein L / Large structural protein / Replicase / Transcriptase


Mass: 257433.953 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Henipavirus nipahense / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: Q997F0, RNA-directed RNA polymerase, Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides, GDP polyribonucleotidyltransferase, NNS virus cap methyltransferase
#2: Protein
Phosphoprotein / Protein P


Mass: 78259.109 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Henipavirus nipahense / Gene: P/V/C / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q9IK91
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationY

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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: Nipah virus polymerase (L) bound to the tetrameric phosphoprotein (P)
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.570 MDa / Experimental value: YES
Source (natural)Organism: Henipavirus nipahense
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.4
SpecimenConc.: 0.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 293.15 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: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 1400 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k)
EM imaging opticsEnergyfilter name: TFS Selectris X / Energyfilter slit width: 10 eV

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Processing

EM software
IDNameVersionCategory
1cryoSPARCV4.4.1particle selection
2EPU3.4image acquisition
4cryoSPARCV4.4.1CTF correction
7UCSF ChimeraX1.8model fitting
9cryoSPARCV4.4.1initial Euler assignment
10cryoSPARCV4.4.1final Euler assignment
11cryoSPARCV4.4.1classification
12cryoSPARCV4.4.13D reconstruction
13PHENIX1.19model refinement
CTF correctionType: NONE
Particle selectionNum. of particles selected: 6748913
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.49 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 490675 / Symmetry type: POINT
Atomic model buildingSpace: REAL
Atomic model buildingSource name: AlphaFold / Type: in silico model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00614830
ELECTRON MICROSCOPYf_angle_d0.6920043
ELECTRON MICROSCOPYf_dihedral_angle_d4.9791951
ELECTRON MICROSCOPYf_chiral_restr0.0462277
ELECTRON MICROSCOPYf_plane_restr0.0062565

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