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| Title | Structural basis for DNA replication by the African swine fever virus polymerase. |
|---|---|
| Journal, issue, pages | iScience, Vol. 28, Issue 12, Page 114155, Year 2025 |
| Publish date | Dec 19, 2025 |
Authors | Ziwei Hu / Yongjie SunKang / Zhiheng Liu / Lihong Huang / Wenbao Qi / Renhong Yan / ![]() |
| PubMed Abstract | African swine fever virus (ASFV) devastates swine herds and lacks widely available antivirals. We show that the ASFV DNA polymerase beta (Pol β; gene ) localizes to viral replication factories and ...African swine fever virus (ASFV) devastates swine herds and lacks widely available antivirals. We show that the ASFV DNA polymerase beta (Pol β; gene ) localizes to viral replication factories and is required for viral replication. Cryo-electron microscopy structures of Pol β in apo and double-stranded DNA (dsDNA)-bound states reveal pronounced conformational flexibility that enables transitions between functional states. Binding to dsDNA promotes higher-order oligomerization that is essential for catalytic activity, as demonstrated by structure-guided mutagenesis and biochemical assays. These findings define the structural basis of ASFV genome synthesis, highlight the functional significance of Pol β during viral replication, and provide a framework for polymerase-targeted antiviral discovery. |
External links | iScience / PubMed:41438038 / PubMed Central |
| Methods | EM (single particle) |
| Resolution | 2.53 - 2.93 Å |
| Structure data | EMDB-62890, PDB-9l8t: EMDB-62891, PDB-9l8u: ![]() EMDB-65680: Cryo-EM map of ASFV DNA polymerase in apo state 2 |
| Chemicals | ![]() ChemComp-DCP: ![]() ChemComp-MG: |
| Source |
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Keywords | DNA BINDING PROTEIN / ASFV / DNA polymerase / Virus / DNA BINDING PROTEIN/DNA / DNA BINDING PROTEIN-DNA complex |
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asfarviridae (virus)
african swine fever virus
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