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- PDB-9iv9: Cryo-EM structure of a truncated Nipah Virus L Protein bound by P... -

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Basic information

Entry
Database: PDB / ID: 9iv9
TitleCryo-EM structure of a truncated Nipah Virus L Protein bound by Phosphoprotein Tetramer
Components
  • Phosphoprotein
  • RNA-directed RNA polymerase L
KeywordsVIRAL PROTEIN / RNA polymerase
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 / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / host cell cytoplasm / 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 / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / host cell cytoplasm / 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 / Mononegavirales RNA-directed RNA polymerase catalytic domain ...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 / 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. / 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: 2.31 Å
AuthorsXue, L. / Chang, T. / Gui, J. / Li, Z. / Zhao, H. / Zou, B. / Li, M. / He, J. / Chen, X. / Xiong, X.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)82341085 to X.X. China
CitationJournal: Protein Cell / Year: 2025
Title: Cryo-EM structures of Nipah virus polymerase complex reveal highly varied interactions between L and P proteins among paramyxoviruses.
Authors: Lu Xue / Tiancai Chang / Jiacheng Gui / Zimu Li / Heyu Zhao / Bingqian Zou / Junnan Lu / Mei Li / Xin Wen / Shenghua Gao / Peng Zhan / Lijun Rong / Liqiang Feng / Peng Gong / Jun He / Xinwen ...Authors: Lu Xue / Tiancai Chang / Jiacheng Gui / Zimu Li / Heyu Zhao / Bingqian Zou / Junnan Lu / Mei Li / Xin Wen / Shenghua Gao / Peng Zhan / Lijun Rong / Liqiang Feng / Peng Gong / Jun He / Xinwen Chen / Xiaoli Xiong /
Abstract: Nipah virus (NiV) and related viruses form a distinct henipavirus genus within the Paramyxoviridae family. NiV continues to spillover into the humans causing deadly outbreaks with increasing human- ...Nipah virus (NiV) and related viruses form a distinct henipavirus genus within the Paramyxoviridae family. NiV continues to spillover into the humans causing deadly outbreaks with increasing human-bat interaction. NiV encodes the large protein (L) and phosphoprotein (P) to form the viral RNA polymerase machinery. Their sequences show limited homologies to those of non-henipavirus paramyxoviruses. We report two cryo-electron microscopy (cryo-EM) structures of the Nipah virus (NiV) polymerase L-P complex, expressed and purified in either its full-length or truncated form. The structures resolve the RNA-dependent RNA polymerase (RdRp) and polyribonucleotidyl transferase (PRNTase) domains of the L protein, as well as a tetrameric P protein bundle bound to the L-RdRp. L-protein C-terminal regions are unresolved, indicating flexibility. Two PRNTase domain zinc-binding sites, conserved in most Mononegavirales, are confirmed essential for NiV polymerase activity. The structures further reveal anchoring of the P protein bundle and P protein X domain (XD) linkers on L, via an interaction pattern distinct among Paramyxoviridae. These interactions facilitate binding of a P protein XD linker in the nucleotide entry channel and distinct positioning of other XD linkers. We show that the disruption of the L-P interactions reduces NiV polymerase activity. The reported structures should facilitate rational antiviral-drug discovery and provide a guide for the functional study of NiV polymerase.
History
DepositionJul 23, 2024Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0May 21, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

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


Theoretical massNumber of molelcules
Total (without water)479,9597
Polymers479,8285
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: 166266.891 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Henipavirus nipahense / Production host: Spodoptera frugiperda ascovirus 1c
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: 78390.320 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 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: Cryo-EM structure of a truncated Nipah Virus L Protein bound by Phosphoprotein Tetramer
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Henipavirus nipahense
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 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: TFS 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: 600 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.31 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 674945 / Symmetry type: POINT
RefinementHighest resolution: 2.31 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00413278
ELECTRON MICROSCOPYf_angle_d0.78217920
ELECTRON MICROSCOPYf_dihedral_angle_d4.831754
ELECTRON MICROSCOPYf_chiral_restr0.0512049
ELECTRON MICROSCOPYf_plane_restr0.0062275

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