Cited by 4Poxvirus research and outbreaksEnzyme Structure and FunctionProtein Structure and Dynamics

The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.

Structure and flexibility of the DNA polymerase holoenzyme of vaccinia virus

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Published version of a preprint

Abstract

The year 2022 was marked by the mpox outbreak caused by the human monkeypox virus (MPXV), which is approximately 98% identical to the vaccinia virus (VACV) at the sequence level with regard to the proteins involved in DNA replication. We present the production in the baculovirus-insect cell system of the VACV DNA polymerase holoenzyme, which consists of the E9 polymerase in combination with its co-factor, the A20-D4 heterodimer. This led to the 3.8 Å cryo-electron microscopy (cryo-EM) structure of the DNA-free form of the holoenzyme. The model of the holoenzyme was constructed from high-resolution structures of the components of the complex and the A20 structure predicted by AlphaFold 2. The structures do not change in the context of the holoenzyme compared to the previously determined crystal and NMR structures, but the E9 thumb domain became disordered. The E9-A20-D4 structure shows the same compact arrangement with D4 folded back on E9 as observed for the recently solved MPXV holoenzyme structures in the presence and the absence of bound DNA. A conserved interface between E9 and D4 is formed by a cluster of hydrophobic residues. Small-angle X-ray scattering data show that other, more open conformations of E9-A20-D4 without the E9-D4 contact exist in solution using the flexibility of two hinge regions in A20. Biolayer interferometry (BLI) showed that the E9-D4 interaction is indeed weak and transient in the absence of DNA although it is very important, as it has not been possible to obtain viable viruses carrying mutations of key residues within the E9-D4 interface.

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Crossref · 10.1371/journal.ppat.1011652

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  1. B. Moss, 2013, Fields Virology, 2129

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Metadata

Authors
Burmeister, W. P., Boutin, L., Balestra, A. C., Gröger, H., Ballandras-Colas, A., Hutin, S., Kraft, C., Grimm, C., Böttcher, B., Fischer, U., Tarbouriech, N., & Iseni, F.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • University of Würzburg (DE)
  • Institut de Biologie Structurale (FR)
Corresponding author
Burmeister, Wim P.
Venue
PLOS Pathogens
Published
2024-05-20
Volume
20
Issue
5
Pages
e1011652
ISSN
  • 1553-7366 (ISSN-L)
  • 1553-7374
OpenAlex
W4398145791
Cited by
3
References
59
Citations by year
2026: 1 · 2025: 1 · 2024: 1
FWCI
0.69
Type
journal article
Language
en
Open access
Locations
  • PLoS Pathogens (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • HAL (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Agence Nationale de la Recherche (ANR-22-CE11-0007-01, ANR-13-BSV8-0014)
  • Communauté Université Grenoble Alpes (G7H-IRS20A71)
  • Deutsche Forschungsgemeinschaft (Fi573/22-1)
Topics
  • Life Sciences › Immunology and Microbiology › Virology › Poxvirus research and outbreaks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
vaccinia virus, protein flexibility, monkeypox virus, DNA replication, protein-protein interaction, hinge region, baculovirus-insect cell expression
MeSH terms
Animals, DNA-Directed DNA Polymerase, Humans, Models, Molecular, Protein Conformation, Vaccinia virus, Viral Proteins, Crystallography, X-Ray, Holoenzymes, Cryoelectron Microscopy

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