8QZ8

Tilapia Lake Virus polymerase in vRNA pre-termination state (transcriptase conformation)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural and functional analysis of the minimal orthomyxovirus-like polymerase of Tilapia Lake Virus from the highly diverged Amnoonviridae family.

Arragain, B.Pelosse, M.Thompson, A.Cusack, S.

(2023) Nat Commun 14: 8145-8145

  • DOI: https://doi.org/10.1038/s41467-023-44044-x
  • Primary Citation of Related Structures:  
    8PSN, 8PSO, 8PSQ, 8PSS, 8PSU, 8PSX, 8PSZ, 8PT2, 8PT6, 8PT7, 8PTH, 8PTJ, 8QZ8

  • PubMed Abstract: 

    Tilapia Lake Virus (TiLV), a recently discovered pathogen of tilapia fish, belongs to the Amnoonviridae family from the Articulavirales order. Its ten genome segments have characteristic conserved ends and encode proteins with no known homologues, apart from the segment 1, which encodes an orthomyxo-like RNA-dependent-RNA polymerase core subunit. Here we show that segments 1-3 encode respectively the PB1, PB2 and PA-like subunits of an active heterotrimeric polymerase that maintains all domains found in the distantly related influenza polymerase, despite an unprecedented overall size reduction of 40%. Multiple high-resolution cryo-EM structures of TiLV polymerase in pre-initiation, initiation and active elongation states, show how it binds the vRNA and cRNA promoters and performs RNA synthesis, with both transcriptase and replicase configurations being characterised. However, the highly truncated endonuclease-like domain appears inactive and the putative cap-binding domain is autoinhibited, emphasising that many functional aspects of TiLV polymerase remain to be elucidated.


  • Organizational Affiliation

    European Molecular Biology Laboratory, 71 Avenue des Martyrs, CS 90181, 38042, Grenoble, Cedex 9, France.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Polymerase acidic protein (PA-like)419Tilapia lake virusMutation(s): 0 
UniProt
Find proteins for A0A142I7Z3 (Tilapia lake virus)
Explore A0A142I7Z3 
Go to UniProtKB:  A0A142I7Z3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A142I7Z3
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Putative PB1519Tilapia lake virusMutation(s): 0 
Gene Names: PB1
UniProt
Find proteins for A0A1Y9SHW4 (Tilapia lake virus)
Explore A0A1Y9SHW4 
Go to UniProtKB:  A0A1Y9SHW4
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UniProt GroupA0A1Y9SHW4
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-dependent RNA polymerase478Tilapia lake virusMutation(s): 0 
UniProt
Find proteins for A0A7G3S745 (Tilapia lake virus)
Explore A0A7G3S745 
Go to UniProtKB:  A0A7G3S745
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A7G3S745
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  • Reference Sequence
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Entity ID: 4
MoleculeChains LengthOrganismImage
Template vRNA_S loop (40-mer)D [auth V]40Tilapia lake virus
Sequence Annotations
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  • Reference Sequence
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Entity ID: 5
MoleculeChains LengthOrganismImage
Transcription-like productE [auth P]32Tilapia lake virus
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC4.2.1
MODEL REFINEMENTPHENIX

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Agence Nationale de la Recherche (ANR)FranceANR-18-CE11-0028

Revision History  (Full details and data files)

  • Version 1.0: 2023-12-27
    Type: Initial release