ArticlePhysical review. E2017
Experimental comparison of forces resisting viral DNA packaging and driving DNA ejection.
Article in Physical review. E, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
What it found
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Who cites it
9 citing papers in PubMed.
- Something old, something new? Herpesvirus genome packaging examined in light of lessons from the tailed bacteriophages.Journal of virology · 2026Review
- Regulation of the ordinal DNA translocation cycle in bacteriophage Φ29 through trans-subunit interactions.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Mechanical Properties of Viruses.Sub-cellular biochemistry · 2024Review
- Optical Tweezers to Study Viruses.Sub-cellular biochemistry · 2024Review
- Role of DNA-DNA sliding friction and nonequilibrium dynamics in viral genome ejection and packaging.Nucleic acids research · 2023Article
- Revolving ATPase motors as asymmetrical hexamers in translocating lengthy dsDNA via conformational changes and electrostatic interactions in phi29, T7, herpesvirus, mimivirus,Exploration (Beijing, China) · 2023Review
- Function of a viral genome packaging motor from bacteriophage T4 is insensitive to DNA sequence.Nucleic acids research · 2020Article
- Article
- Evidence that a catalytic glutamate and an 'Arginine Toggle' act in concert to mediate ATP hydrolysis and mechanochemical coupling in a viral DNA packaging motor.Nucleic acids research · 2019Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
We compare forces resisting DNA packaging and forces driving DNA ejection in bacteriophage phi29 with theoretical predictions. Ejection of DNA from prohead-motor complexes is triggered by heating complexes after in vitro packaging and force is inferred from the suppression of ejection by applied osmotic pressure. Ejection force from 0% to 80% filling is found to be in quantitative agreement with predictions of a continuum mechanics model that assumes a repulsive DNA-DNA interaction potential based on DNA condensation studies and predicts an inverse-spool conformation. Force resisting DNA packaging from ∼80% to 100% filling inferred from optical tweezers studies is also consistent with the predictions of this model. The striking agreement with these two different measurements suggests that the overall energetics of DNA packaging is well described by the model. However, since electron microscopy studies of phi29 do not reveal a spool conformation, our findings suggest that the spool model overestimates the role of bending rigidity and underestimates the role of intrastrand repulsion. Below ∼80% filling the inferred forces resisting packaging are unexpectedly lower than the inferred ejection forces, suggesting that in this filling range the forces are less accurately determined or strongly temperature dependent.
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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.