Evidence map›Paper›PMID 32938767›Full record

ArticleJournal of virology2020

Covalent Modifications of the Bacteriophage Genome Confer a Degree of Resistance to Bacterial CRISPR Systems.

Yuepeng Liu, Li Dai, Junhua Dong, Cen Chen, Jingen Zhu, Venigalla B Rao, Pan Tao

Open access · greenAbstract read
In one paragraph

Article in Journal of virology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
2.5field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

39 citing papers in PubMed, 59 citations in OpenAlex.

  1. Article
  2. Bacterial immune systems.Antonie van Leeuwenhoek · 2026
    Review
  3. Article
  4. Review
  5. Article
  6. A pentose, as a cytosine nucleobase modification inApplied and environmental microbiology · 2026
    Article
  7. Review
  8. Article
  9. Rapid detection ofActa biochimica et biophysica Sinica · 2025
    Article
  10. Review
  11. Article
  12. Article
  13. Tevenvirinae phages encode a family of LSm-like fold proteins.Computational and structural biotechnology journal · 2025
    Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. HyCas9-12aGEP: an efficient genome editing platform forFrontiers in bioengineering and biotechnology · 2024
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Yuepeng LiuCollege of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China.
Li DaiDepartment of Biology, The Catholic University of America, Washington, DC, USA.
Junhua DongCollege of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China.
Cen ChenCollege of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China.
Jingen ZhuDepartment of Biology, The Catholic University of America, Washington, DC, USA.
Venigalla B RaoDepartment of Biology, The Catholic University of America, Washington, DC, USA rao@cua.edu taopan@mail.hzau.edu.cn.
Pan TaoCollege of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China rao@cua.edu taopan@mail.hzau.edu.cn.ORCID 0000-0002-0082-2229
Huazhong Agricultural University · CNUniversity of America · US

Funding

Structural studies of bacteriophage T4 and their potential medical applicationsR01AI081726 · NIAID · PURDUE UNIVERSITY · PI KUHN, RICHARD J., RAO, VENIGALLA B. · 2010 to 2019
$6.2M
Identification of New Antigens for a Plague VaccineR01AI064389 · NIAID · UNIVERSITY OF TEXAS MEDICAL BR GALVESTON · PI CHOPRA, ASHOK K · 2005 to 2015
$3.8M
Single Dose, Multivalent, Anthrax Plague Vaccines using Bacteriophage T4 NanopartR01AI111538 · NIAID · CATHOLIC UNIVERSITY OF AMERICA · PI RAO, VENIGALLA B. · 2014 to 2018
$3.6M
A Multicomponent Anthrax Vaccine using Phage T4 DisplayU01AI056443 · NIAID · CATHOLIC UNIVERSITY OF AMERICA · PI RAO, VENIGALLA B. · 2003 to 2007
$3.3M
Multivalent Plague, Anthrax Vaccines Using Bacteriophage T4 DisplayU01AI082086 · NIAID · CATHOLIC UNIVERSITY OF AMERICA · PI RAO, VENIGALLA B. · 2009 to 2013
$2.2M
Structural studies of bacteriophage T4 and their potential medical applicationsR56AI081726 · NIAID · PURDUE UNIVERSITY · PI ROSSMANN, MICHAEL G · 2009 to 2009
$600k
NIAID NIH HHS R01 AI064389NIAID NIH HHS R01 AI081726NIAID NIH HHS R01 AI111538NIAID NIH HHS R56 AI081726NIAID NIH HHS U01 AI056443NIAID NIH HHS U01 AI082086
6 · The paper itself

Abstract

The interplay between defense and counterdefense systems of bacteria and bacteriophages has been driving the evolution of both organisms, leading to their great genetic diversity. Restriction-modification systems are well-studied defense mechanisms of bacteria, while phages have evolved covalent modifications as a counterdefense mechanism to protect their genomes against restriction. Here, we present evidence that these genome modifications might also have been selected to counter, broadly, the CRISPR-Cas systems, an adaptive bacterial defense mechanism. We found that the phage T4 genome modified by cytosine hydroxymethylation and glucosylation (ghmC) exhibits various degrees of resistance to the type V CRISPR-Cas12a system, producing orders of magnitude more progeny than the T4(C) mutant, which contains unmodified cytosines. Furthermore, the progeny accumulated CRISPR escape mutations, allowing rapid evolution of mutant phages under CRISPR pressure. A synergistic effect on phage restriction was observed when two CRISPR-Cas12a complexes were targeted to independent sites on the phage genome, another potential countermechanism by bacteria to more effectively defend themselves against modified phages. These studies suggest that the defense-counterdefense mechanisms exhibited by bacteria and phages, while affording protection against one another, also provide evolutionary benefits for both.

Indexed as

CRISPR-Cas SystemsBacteriaBacterial ProteinsBacteriophagesBacteriophage T4Base SequenceClustered Regularly Interspaced Short Palindromic RepeatsCRISPR-Associated ProteinsCytosineEndodeoxyribonucleasesEscherichia coliSequence Analysis, DNABacterial ProteinsCas12a proteinCRISPR-Associated ProteinsCytosineEndodeoxyribonucleasesbacteriophageCRISPR-Casgenome modificationphage T4restriction-modification system

Identifiers

PMID32938767
PMCPMC7654273
OpenAlexW3087407932

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.