Apo-structure of Lassa virus L protein (well-resolved polymerase core) [APO-CORE]

Experimental Data Snapshot

  • Resolution: 3.14 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Conformational changes in Lassa virus L protein associated with promoter binding and RNA synthesis activity.

Kouba, T.Vogel, D.Thorkelsson, S.R.Quemin, E.R.J.Williams, H.M.Milewski, M.Busch, C.Gunther, S.Grunewald, K.Rosenthal, M.Cusack, S.

(2021) Nat Commun 12: 7018-7018

  • DOI: https://doi.org/10.1038/s41467-021-27305-5
  • Primary Citation of Related Structures:  
    7OCH, 7OE3, 7OE7, 7OEA, 7OEB, 7OJJ, 7OJK, 7OJL, 7OJN

  • PubMed Abstract: 

    Lassa virus is endemic in West Africa and can cause severe hemorrhagic fever. The viral L protein transcribes and replicates the RNA genome via its RNA-dependent RNA polymerase activity. Here, we present nine cryo-EM structures of the L protein in the apo-, promoter-bound pre-initiation and active RNA synthesis states. We characterize distinct binding pockets for the conserved 3' and 5' promoter RNAs and show how full-promoter binding induces a distinct pre-initiation conformation. In the apo- and early elongation states, the endonuclease is inhibited by two distinct L protein peptides, whereas in the pre-initiation state it is uninhibited. In the early elongation state, a template-product duplex is bound in the active site cavity together with an incoming non-hydrolysable nucleotide and the full C-terminal region of the L protein, including the putative cap-binding domain, is well-ordered. These data advance our mechanistic understanding of how this flexible and multifunctional molecular machine is activated.

  • Organizational Affiliation

    European Molecular Biology Laboratory, Grenoble, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-directed RNA polymerase LA [auth L]2,217Mammarenavirus lassaenseMutation(s): 0 
EC: (PDB Primary Data), 3.1 (PDB Primary Data)
Find proteins for A0A3S8NV63 (Mammarenavirus lassaense)
Explore A0A3S8NV63 
Go to UniProtKB:  A0A3S8NV63
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A3S8NV63
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.14 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Leibniz AssociationGermanyK27/2017
German Research Foundation (DFG)GermanyINST 152/777-1 FUGG

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-01
    Type: Initial release
  • Version 1.1: 2021-12-22
    Changes: Database references