ArticleNucleic acids research2023
Insights into a viral motor: the structure of the HK97 packaging termination assembly.
Article in Nucleic acids research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed, 27 citations in OpenAlex.
- Something old, something new? Herpesvirus genome packaging examined in light of lessons from the tailed bacteriophages.Journal of virology · 2026Review
- Dissecting the dsDNA viral packaging machinery: structural evolution and potential for therapeutics.Journal of virology · 2026Review
- Intact architectures of myophage phi92 in extended and contracted states.PLoS pathogens · 2026Article
- A highly conserved basic motif in the wing domain of portal protein is necessary for oligomerization and incorporation in phage P22.Journal of virology · 2026Article
- Insights into the AAV packaging mechanism: Cryo-EM Structure of the AAV2 Rep-Capsid Packaging Complex.bioRxiv : the preprint server for biology · 2025Article
- Structural insights into scaffold-guided assembly of the Pseudomonas phage D3 capsid.Nature communications · 2025Article
- Review
- Structure of the Staphylococcus aureus bacteriophage 80α neck shows details of the DNA, tail completion protein, and tape measure protein.Structure (London, England : 1993) · 2025Article
- Red Mud Potentially Alleviates Ammonia Nitrogen Inhibition in Swine Manure Anaerobic Digestion by Enhancing Phage-Mediated Ammonia Assimilation.Microorganisms · 2025Article
- Dual role of phage terminase inEngineering microbiology · 2024Article
- Structural basis for DNA recognition by a viral genome-packaging machine.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Structural morphing in the viral portal vertex of bacteriophage lambda.Journal of virology · 2024Article
- Structure of the Portal Complex from Staphylococcus aureus Pathogenicity Island 1 Transducing Particles In Situ and In Isolation.Journal of molecular biology · 2024Article
- Mechanism of Viral DNA Packaging in Phage T4 Using Single-Molecule Fluorescence Approaches.Viruses · 2024Review
- PMCNA_RS00975 activates NF-κB and ERK1/2 through TLR2 and contributes to the virulence ofFrontiers in cellular and infection microbiology · 2024Article
- Cryo-electron microscopy in the study of virus entry and infection.Frontiers in molecular biosciences · 2024Review
- Viral Genomic DNA Packaging Machinery.Sub-cellular biochemistry · 2024Review
Corrections and comments
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Authors and funding
7 authors at 4 institutions in 3 countries.
Funding
Abstract
Double-stranded DNA viruses utilise machinery, made of terminase proteins, to package viral DNA into the capsid. For cos bacteriophage, a defined signal, recognised by small terminase, flanks each genome unit. Here we present the first structural data for a cos virus DNA packaging motor, assembled from the bacteriophage HK97 terminase proteins, procapsids encompassing the portal protein, and DNA containing a cos site. The cryo-EM structure is consistent with the packaging termination state adopted after DNA cleavage, with DNA density within the large terminase assembly ending abruptly at the portal protein entrance. Retention of the large terminase complex after cleavage of the short DNA substrate suggests that motor dissociation from the capsid requires headful pressure, in common with pac viruses. Interestingly, the clip domain of the 12-subunit portal protein does not adhere to C12 symmetry, indicating asymmetry induced by binding of the large terminase/DNA. The motor assembly is also highly asymmetric, showing a ring of 5 large terminase monomers, tilted against the portal. Variable degrees of extension between N- and C-terminal domains of individual subunits suggest a mechanism of DNA translocation driven by inter-domain contraction and relaxation.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.