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TitleStructural basis for Salmonella infection by two Microviridae phages.
Journal, issue, pagesCommun Biol, Vol. 8, Issue 1, Page 1166, Year 2025
Publish dateAug 6, 2025
AuthorsWanlong Hu / Zhengjie Liu / Yuming Wei / Qucheng Bian / Weiqi Lan / Chongzheng Fan / Jiaoyang Song / Qianqian Sun / Xiaojie Zhang / Yuqing Liu / Yan Gao / Yibao Chen /
PubMed AbstractThe global resurgence of multidrug-resistant Salmonella species, responsible for millions of annual infections, underscores the urgent need for alternative antimicrobial strategies, such as phage ...The global resurgence of multidrug-resistant Salmonella species, responsible for millions of annual infections, underscores the urgent need for alternative antimicrobial strategies, such as phage therapy. Microviridae phages offer a promising model for studying phage-host interactions with their unique structural and infection mechanisms. Here, we identify two Microviridae phages, PJNS001 and PJNS002, with different host receptor dependencies, and determine their cryo-EM structures at 2.68 Å and 2.59 Å resolution, respectively. These icosahedral capsids with T = 1 symmetry exhibit a unique vertex reinforcement mechanism, stabilizing the viral assembly. The specific pentameric adaptations, coupled with DNA binding protein engagements and thermodynamic constraints, collectively preclude the formation of hybrid virions. Structural analysis and in situ visualization reveal spike protein features and host-attachment intermediates, informing host specificity. Together, these findings advance our understanding of Microviridae infection mechanisms and provide a structural framework for rational phage design against antibiotic-resistant pathogens.
External linksCommun Biol / PubMed:40770068 / PubMed Central
MethodsEM (single particle) / EM (subtomogram averaging)
Resolution2.59 - 32.3 Å
Structure data

EMDB-62019, PDB-9k3m:
The structure of Microviridae PJNS001
Method: EM (single particle) / Resolution: 2.68 Å

EMDB-62020: The Map of PJNS002 spike protein G with Salmonella enterica LPS
Method: EM (single particle) / Resolution: 3.95 Å

EMDB-62021: The STA map of PJNS001 attached on Salmonella outer membrane
Method: EM (subtomogram averaging) / Resolution: 32.3 Å

EMDB-62022: The STA map of PJNS002 attached on Salmonella outer membrane
Method: EM (subtomogram averaging) / Resolution: 31.02 Å

EMDB-62023, PDB-9k3n:
The structure of Salmonella phage PJNS002
Method: EM (single particle) / Resolution: 2.59 Å

Source
  • microviridae (isometric ssDNA phages)
  • salmonella phage pjns002 (virus)
KeywordsVIRUS / structual proteins

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