Evidence map›Paper›PMID 28355179›Full record

ArticleNature2017

CRISPR-Cas systems exploit viral DNA injection to establish and maintain adaptive immunity.

Joshua W Modell, Wenyan Jiang, Luciano A Marraffini

Abstract read
In one paragraph

Article in Nature, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 95 papers.

0numbers the graph read from it
0cells of the map it votes in
95citing papers in PubMed
8.3field-weighted citation impact, top 2% 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

95 citing papers in PubMed, 159 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. CRISPR adaptation inmSphere · 2025
    Article
  11. Article
  12. Article
  13. Cat1 forms filament networks to degrade NADScience (New York, N.Y.) · 2025
    Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article

35 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Joshua W ModellLaboratory of Bacteriology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
Wenyan JiangLaboratory of Bacteriology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
Luciano A MarraffiniLaboratory of Bacteriology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
Rockefeller University · US

Funding

Using CRISPR immunity to prevent the spread of virulence traits among pathogensDP2AI104556 · NIAID · ROCKEFELLER UNIVERSITY · PI MARRAFFINI, LUCIANO A · 2012 to 2012
$2.5M
NIAID NIH HHS DP2 AI104556
6 · The paper itself

Abstract

Clustered regularly interspaced short palindromic repeats (CRISPR)-Cas systems provide protection against viral and plasmid infection by capturing short DNA sequences from these invaders and integrating them into the CRISPR locus of the prokaryotic host. These sequences, known as spacers, are transcribed into short CRISPR RNA guides that specify the cleavage site of Cas nucleases in the genome of the invader. It is not known when spacer sequences are acquired during viral infection. Here, to investigate this, we tracked spacer acquisition in Staphylococcus aureus cells harbouring a type II CRISPR-Cas9 system after infection with the staphylococcal bacteriophage ϕ12. We found that new spacers were acquired immediately after infection preferentially from the cos site, the viral free DNA end that is first injected into the cell. Analysis of spacer acquisition after infection with mutant phages demonstrated that most spacers are acquired during DNA injection, but not during other stages of the viral cycle that produce free DNA ends, such as DNA replication or packaging. Finally, we showed that spacers acquired from early-injected genomic regions, which direct Cas9 cleavage of the viral DNA immediately after infection, provide better immunity than spacers acquired from late-injected regions. Our results reveal that CRISPR-Cas systems exploit the phage life cycle to generate a pattern of spacer acquisition that ensures a successful CRISPR immune response.

Indexed as

Attachment Sites, MicrobiologicalBacillus PhagesClustered Regularly Interspaced Short Palindromic RepeatsCRISPR-Associated ProteinsCRISPR-Cas SystemsDNA, ViralMutationStaphylococcus aureusTime FactorsTransfectionCRISPR-Associated ProteinsDNA, Viral

Identifiers

PMID28355179
PMCPMC5540373
OpenAlexW2602895244

What OpenQuestion holds

Textmetadata
LicenceTDM
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.