Cited by 31Poxvirus research and outbreaksEnzyme Structure and FunctionVirology and Viral Diseases

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Structural basis for the assembly of the DNA polymerase holoenzyme from a monkeypox virus variant

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Li, Yaning, Shen, Yaping, Hu, Ziwei, Yan, Renhong·2023·Science Advances

Published version of a preprint

Abstract

The ongoing global pandemic caused by a variant of the monkeypox (or mpox) virus (MPXV) has prompted widespread concern. The MPXV DNA polymerase holoenzyme, consisting of F8, A22, and E4, is vital for replicating the viral genome and represents a crucial target for the development of antiviral drugs. However, the assembly and working mechanism for the DNA polymerase holoenzyme of MPXV remains elusive. Here, we present the cryo–electron microscopy (cryo-EM) structure of the DNA polymerase holoenzyme at an overall resolution of 3.5 Å. Unexpectedly, the holoenzyme is assembled as a dimer of heterotrimers, of which the extra interface between the thumb domain of F8 and A22 shows a clash between A22 and substrate DNA, suggesting an autoinhibition state. Addition of exogenous double-stranded DNA shifts the hexamer into trimer exposing DNA binding sites, potentially representing a more active state. Our findings provide crucial steps toward developing targeted antiviral therapies for MPXV and related viruses.

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Metadata

Authors
Li, Y., Shen, Y., Hu, Z., & Yan, R.
Affiliations
  • Westlake University (CN)
  • Southern University of Science and Technology (CN)
Corresponding author
Yan, Renhong
Venue
Science Advances
Published
2023-04-21
Volume
9
Issue
16
Pages
eadg2331-eadg2331
ISSN
2375-2548 (ISSN-L)
OpenAlex
W4366382766
Cited by
31
References
1
Citations by year
2026: 8 · 2025: 9 · 2024: 11 · 2023: 3
FWCI
4.07
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Science Advances (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Science, Technology and Innovation Commission of Shenzhen Municipality
  • Southern University of Science and Technology
Topics
  • Life Sciences › Immunology and Microbiology › Virology › Poxvirus research and outbreaks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Enzyme Structure and Function
  • Health Sciences › Medicine › Epidemiology › Virology and Viral Diseases
Keywords
monkeypox virus, autoinhibition, thumb domain, DNA binding, viral genome replication, antiviral drug targets, cryo-EM structure
MeSH terms
DNA-Directed DNA Polymerase, Humans, Monkeypox virus, Cryoelectron Microscopy, Mpox (monkeypox), Mpox, Monkeypox

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