6Z6G

Cryo-EM structure of La Crosse virus polymerase at pre-initiation stage

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.06 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

Pre-initiation and elongation structures of full-length La Crosse virus polymerase reveal functionally important conformational changes.

Arragain, B., Effantin, G., Gerlach, P., Reguera, J., Schoehn, G., Cusack, S., Malet, H.

(2020) Nat Commun 11: 3590-3590

  • DOI: 10.1038/s41467-020-17349-4
  • Primary Citation of Related Structures:  
    6Z6B, 6Z6G, 6Z8K

  • PubMed Abstract: 

    • Bunyavirales is an order of segmented negative-strand RNA viruses comprising several life-threatening pathogens against which no effective treatment is currently available. Replication and transcription of the RNA genome constitute essential processes performed by the virally encoded multi-domain RNA-dependent RNA polymerase ...

    Bunyavirales is an order of segmented negative-strand RNA viruses comprising several life-threatening pathogens against which no effective treatment is currently available. Replication and transcription of the RNA genome constitute essential processes performed by the virally encoded multi-domain RNA-dependent RNA polymerase. Here, we describe the complete high-resolution cryo-EM structure of La Crosse virus polymerase. It reveals the presence of key protruding C-terminal domains, notably the cap-binding domain, which undergoes large movements related to its role in transcription initiation, and a zinc-binding domain that displays a fold not previously observed. We capture the polymerase structure at pre-initiation and elongation states, uncovering the coordinated movement of the priming loop, mid-thumb ring linker and lid domain required for the establishment of a ten-base-pair template-product RNA duplex before strand separation into respective exit tunnels. These structural details and the observed dynamics of key functional elements will be instrumental for structure-based development of polymerase inhibitors.

    Organizational Affiliation: 

    Université Grenoble Alpes, CNRS, CEA, Institute for Structural Biology (IBS), F-38000, Grenoble, France. helene.malet@ibs.fr.



Macromolecules

Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
RNA-directed RNA polymerase LD [auth A]2285La Crosse virusMutation(s): 0 
Gene Names: L
EC: 2.7.7.48 (PDB Primary Data), 3.1 (PDB Primary Data)
UniProt
Find proteins for A5HC98 (Bunyavirus La Crosse)
Explore A5HC98 
Go to UniProtKB:  A5HC98
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    5'vRNA 1-10A [auth U]10La Crosse orthobunyavirus
    Protein Feature View
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    • Reference Sequence
    • Find similar nucleic acids by:  Sequence   |   Structure
      • Entity ID: 2
      MoleculeChainsLengthOrganismImage
      5'vRNA 9-16B [auth X]8La Crosse orthobunyavirus
      Protein Feature View
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      • Reference Sequence
      • Find similar nucleic acids by:  Sequence   |   Structure
        • Entity ID: 3
        MoleculeChainsLengthOrganismImage
        3'vRNA 1-16C [auth H]16La Crosse orthobunyavirus
        Protein Feature View
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        • Reference Sequence
        Small Molecules
        Ligands 2 Unique
        IDChainsName / Formula / InChI Key2D Diagram3D Interactions
        ZN (Subject of Investigation/LOI)
        Query on ZN
        Download Ideal Coordinates CCD File 
        		 E [auth A]ZINC ION
        Zn
        PTFCDOFLOPIGGS-UHFFFAOYSA-N        		 Ligand Interaction
        MG (Subject of Investigation/LOI)
        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: 3.06 Å
        • Aggregation State: PARTICLE 
        • Reconstruction Method: SINGLE PARTICLE 

        Structure Validation

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        View more in-depth experimental data

        Entry History & Funding Information

        Deposition Data

        Funding OrganizationLocationGrant Number
        French National Research AgencyFranceANR-19-CE11-0024-02

        Revision History  (Full details and data files)

        • Version 1.0: 2020-07-29
          Type: Initial release