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- PDB-9cok: Cryo-EM structure of the Nipah virus (Malaysia Strain) L:P complex -

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Basic information

Entry
Database: PDB / ID: 9cok
TitleCryo-EM structure of the Nipah virus (Malaysia Strain) L:P complex
Components
  • Phosphoprotein
  • RNA-directed RNA polymerase L
KeywordsVIRAL PROTEIN / TRANSFERASE / RNA dependent RNA polymerase / Nipah virus / LP complex
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) / P/V phosphoprotein, paramyxoviral / Paramyxovirus P/V phosphoprotein C-terminal / RNA-directed RNA polymerase, paramyxovirus / 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) / P/V phosphoprotein, paramyxoviral / Paramyxovirus P/V phosphoprotein C-terminal / RNA-directed RNA polymerase, paramyxovirus / 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: 2.92 Å
AuthorsChen, Z.H. / Liang, B.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)U19 AI171413 United States
CitationJournal: Nat Commun / Year: 2025
Title: Cryo-EM structures of Nipah virus polymerases and high-throughput RdRp assay development enable anti-NiV drug discovery.
Authors: Zhenhang Chen / Jeanne Quirit Dudley / Colin Deniston / Cosmo Z Buffalo / Debjani Patra / Dongdong Cao / Julia Hunt / Ahmed Rohaim / Debapriya Sengupta / Lan Wen / Tiffany Tsang / Lili Xie / ...Authors: Zhenhang Chen / Jeanne Quirit Dudley / Colin Deniston / Cosmo Z Buffalo / Debjani Patra / Dongdong Cao / Julia Hunt / Ahmed Rohaim / Debapriya Sengupta / Lan Wen / Tiffany Tsang / Lili Xie / Michael DiDonato / Glen Spraggon / Matthew C Clifton / Nadine Jarrousse / Judith Straimer / Bo Liang /
Abstract: Transcription and replication of the Nipah virus (NiV) are driven by the large protein (L) together with its essential co-factor phosphoprotein (P). L encodes all the viral enzymatic functions, ...Transcription and replication of the Nipah virus (NiV) are driven by the large protein (L) together with its essential co-factor phosphoprotein (P). L encodes all the viral enzymatic functions, including RNA-dependent RNA polymerase (RdRp) activity, while the tetrameric P is multi-modular. Here, we investigate the molecular mechanism of the NiV polymerase and build tools for anti-NiV drug discovery. We analyze and compare multiple cryo-EM structures of both full-length and truncated NiV polymerases from the Malaysia and Bangladesh strains. We identify two conserved loops in the polyribonucleotidyltransferase (PRNTase) domain of L and the binding between RdRp-PRNTase and CD domains. To further assess the mechanism of NiV polymerase activity, we establish a highly sensitive radioactive-labeled RNA synthesis assay and identify a back-priming activity in the NiV polymerase as well as a fluorescence and luminescent-based non-radioactive polymerase assay to enable high-throughput screening for L protein inhibitors. The combination of structural analysis and the development of both high-sensitive and high-throughput biochemical assays will enable the identification of new direct-acting antiviral candidates for treating highly pathogenic henipaviruses.
History
DepositionJul 16, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 23, 2025Provider: repository / Type: Initial release
Revision 1.0Jul 23, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jul 23, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Jul 23, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 23, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 23, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jul 23, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Nov 5, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
B: Phosphoprotein
D: Phosphoprotein
C: Phosphoprotein
A: RNA-directed RNA polymerase L
E: Phosphoprotein
F: Phosphoprotein
G: Phosphoprotein


Theoretical massNumber of molelcules
Total (without water)764,7977
Polymers764,7977
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Phosphoprotein / Protein P


Mass: 84026.422 Da / Num. of mol.: 6
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
#2: Protein RNA-directed RNA polymerase L / Protein L / Large structural protein / Replicase / Transcriptase


Mass: 260638.609 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
Has protein modificationN

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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: Complex of Nipah virus RNA polymerase L protein with its cofactor P protein
Type: COMPLEX
Details: Full length of L and P protein of Nipah virus expressed from insect cell Spodoptera frugiperda.
Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.57 MDa / Experimental value: NO
Source (natural)Organism: Henipavirus nipahense / Strain: Malaysia
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.6
Buffer component
IDConc.NameFormulaBuffer-ID
130 mMtris(hydroxymethyl)aminomethane-HCl1
2300 mMsodium chlorideNaCl1
31 mMtris(2-carboxyethyl)phosphine1
SpecimenConc.: 0.7 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: Quantifoil
VitrificationInstrument: FEI VITROBOT MARK II / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 291 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 55 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.21_5207: / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.92 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 258905 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00212423
ELECTRON MICROSCOPYf_angle_d0.48216766
ELECTRON MICROSCOPYf_dihedral_angle_d5.0221654
ELECTRON MICROSCOPYf_chiral_restr0.041917
ELECTRON MICROSCOPYf_plane_restr0.0032125

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