7OZU

SARS-CoV-2 RdRp with Molnupiravir/ NHC in the template strand base-paired with A


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanism of molnupiravir-induced SARS-CoV-2 mutagenesis.

Kabinger, F.Stiller, C.Schmitzova, J.Dienemann, C.Kokic, G.Hillen, H.S.Hobartner, C.Cramer, P.

(2021) Nat Struct Mol Biol 28: 740-746

  • DOI: https://doi.org/10.1038/s41594-021-00651-0
  • Primary Citation of Related Structures:  
    7OZU, 7OZV

  • PubMed Abstract: 

    Molnupiravir is an orally available antiviral drug candidate currently in phase III trials for the treatment of patients with COVID-19. Molnupiravir increases the frequency of viral RNA mutations and impairs SARS-CoV-2 replication in animal models and in humans. Here, we establish the molecular mechanisms underlying molnupiravir-induced RNA mutagenesis by the viral RNA-dependent RNA polymerase (RdRp). Biochemical assays show that the RdRp uses the active form of molnupiravir, β-D-N 4 -hydroxycytidine (NHC) triphosphate, as a substrate instead of cytidine triphosphate or uridine triphosphate. When the RdRp uses the resulting RNA as a template, NHC directs incorporation of either G or A, leading to mutated RNA products. Structural analysis of RdRp-RNA complexes that contain mutagenesis products shows that NHC can form stable base pairs with either G or A in the RdRp active center, explaining how the polymerase escapes proofreading and synthesizes mutated RNA. This two-step mutagenesis mechanism probably applies to various viral polymerases and can explain the broad-spectrum antiviral activity of molnupiravir.


  • Organizational Affiliation

    Max Planck Institute for Biophysical Chemistry, Department of Molecular Biology, Göttingen, Germany.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Replicase polyprotein 1ab932Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTD1 
Go to UniProtKB:  P0DTD1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTD1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Non-structural protein 8217Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTD1 
Go to UniProtKB:  P0DTD1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTD1
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Non-structural protein 784Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTD1 
Go to UniProtKB:  P0DTD1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTD1
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  • Reference Sequence
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Entity ID: 4
MoleculeChains LengthOrganismImage
Product RNAD [auth P]32synthetic construct
Sequence Annotations
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  • Reference Sequence
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Entity ID: 5
MoleculeChains LengthOrganismImage
Template RNAE [auth T]33synthetic construct
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanySFB1190, FOR2848, EXC 2067/1-390729940
German Research Foundation (DFG)GermanySPP1784
European Research Council (ERC)Germany682586
German Research Foundation (DFG)GermanySFB860, SPP2191, EXC 2067/1-390729940)
European Research Council (ERC)Germany693023

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-18
    Type: Initial release
  • Version 1.1: 2021-09-29
    Changes: Data collection, Database references
  • Version 1.2: 2024-07-17
    Changes: Data collection, Database references