7ORI

La Crosse virus polymerase at replication late-elongation stage


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural snapshots of La Crosse virus polymerase reveal the mechanisms underlying Peribunyaviridae replication and transcription.

Arragain, B.Durieux Trouilleton, Q.Baudin, F.Provaznik, J.Azevedo, N.Cusack, S.Schoehn, G.Malet, H.

(2022) Nat Commun 13: 902-902

  • DOI: 10.1038/s41467-022-28428-z
  • Primary Citation of Related Structures:  
    7ORI, 7ORJ, 7ORK, 7ORL, 7ORM, 7ORN, 7ORO

  • PubMed Abstract: 
  • Segmented negative-strand RNA bunyaviruses encode a multi-functional polymerase that performs genome replication and transcription. Here, we establish conditions for in vitro activity of La Crosse virus polymerase and visualize its conformational dynamics by cryo-electron microscopy, unveiling the precise molecular mechanics underlying its essential activities ...

    Segmented negative-strand RNA bunyaviruses encode a multi-functional polymerase that performs genome replication and transcription. Here, we establish conditions for in vitro activity of La Crosse virus polymerase and visualize its conformational dynamics by cryo-electron microscopy, unveiling the precise molecular mechanics underlying its essential activities. We find that replication initiation is coupled to distal duplex promoter formation, endonuclease movement, prime-and-realign loop extension and closure of the polymerase core that direct the template towards the active site. Transcription initiation depends on C-terminal region closure and endonuclease movements that prompt primer cleavage prior to primer entry in the active site. Product realignment after priming, observed in replication and transcription, is triggered by the prime-and-realign loop. Switch to elongation results in polymerase reorganization and core region opening to facilitate template-product duplex formation in the active site cavity. The uncovered detailed mechanics should be helpful for the future design of antivirals counteracting bunyaviral life threatening pathogens.


    Organizational Affiliation

    Institut Universitaire de France (IUF), Paris, France. helene.malet@ibs.fr.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
La Crosse virus polymeraseD [auth A]2,276La Crosse orthobunyavirusMutation(s): 1 
Gene Names: L segment
EC: 2.7.7.48 (PDB Primary Data), 3.1 (UniProt)
UniProt
Find proteins for A5HC98 (Bunyavirus La Crosse)
Explore A5HC98 
Go to UniProtKB:  A5HC98
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA5HC98
Protein Feature View
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsLengthOrganismImage
RNA (5'-R(P*AP*CP*GP*AP*GP*UP*GP*UP*CP*GP*U)-3')A [auth H]17La Crosse orthobunyavirus
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsLengthOrganismImage
RNA (5'-R(P*AP*AP*CP*GP*UP*UP*AP*UP*CP*UP*AP*UP*AP*AP*CP*AP*CP*UP*AP*CP*U)-3')B [auth T]30La Crosse orthobunyavirus
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
RNA (5'-R(P*AP*UP*AP*GP*AP*UP*AP*AP*CP*GP*UP*U)-3')C [auth P]30La Crosse orthobunyavirus
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
POP
Query on POP

Download Ideal Coordinates CCD File 
G [auth A]PYROPHOSPHATE 2-
H2 O7 P2
XPPKVPWEQAFLFU-UHFFFAOYSA-L
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
F [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Agence Nationale de la Recherche (ANR)FranceANR-19-CE11-0024-02

Revision History  (Full details and data files)

  • Version 1.0: 2022-02-16
    Type: Initial release
  • Version 1.1: 2022-03-02
    Changes: Database references