Evidence map›Paper›PMID 34819640›Full record

ArticleNature microbiology2021

Prophage integration into CRISPR loci enables evasion of antiviral immunity in Streptococcus pyogenes.

Andrew Varble, Edmondo Campisi, Chad W Euler, Pascal Maguin, Albina Kozlova, Jessica Fyodorova, Jakob T Rostøl, Vincent A Fischetti, Luciano A Marraffini

Abstract read
PubMed Publisher
In one paragraph

Article in Nature microbiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
3.1field-weighted citation impact, top 7% 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

31 citing papers in PubMed, 43 citations in OpenAlex.

  1. Article
  2. Revisiting the life cycle of temperate phages.Nature reviews. Microbiology · 2026
    Review
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  10. Review
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  14. Defense and anti-defense mechanisms of bacteria and bacteriophages.Journal of Zhejiang University. Science. B · 2024
    Article
  15. Article
  16. Advances in application of CRISPR-Cas13a system.Frontiers in cellular and infection microbiology · 2024
    Review
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 1 country.

Andrew VarbleLaboratory of Bacteriology, The Rockefeller University, New York, NY, USA. avarble@rockefeller.edu.ORCID http://orcid.org/0000-0002-4534-630X
Edmondo CampisiLaboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, NY, USA.
Chad W EulerLaboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, NY, USA.
Pascal MaguinLaboratory of Bacteriology, The Rockefeller University, New York, NY, USA.
Albina KozlovaLaboratory of Bacteriology, The Rockefeller University, New York, NY, USA.
Jessica FyodorovaLaboratory of Bacteriology, The Rockefeller University, New York, NY, USA.ORCID http://orcid.org/0000-0002-5143-0145
Jakob T RostølLaboratory of Bacteriology, The Rockefeller University, New York, NY, USA.
Vincent A FischettiLaboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, NY, USA.
Luciano A MarraffiniLaboratory of Bacteriology, The Rockefeller University, New York, NY, USA. marraffini@rockefeller.edu.ORCID http://orcid.org/0000-0002-9163-0969
Rockefeller University · USHoward Hughes Medical Institute · USHunter College · US

Funding

Generation of immunological memory by CRISPR-Cas systemsDP1GM128184 · NIGMS · ROCKEFELLER UNIVERSITY · PI MARRAFFINI, LUCIANO A · 2017 to 2021
$5.9M
NIGMS NIH HHS DP1 GM128184
6 · The paper itself

Abstract

CRISPR loci are composed of short DNA repeats separated by sequences, known as spacers, that match the genomes of invaders such as phages and plasmids. Spacers are transcribed and processed to generate RNA guides used by CRISPR-associated nucleases to recognize and destroy the complementary nucleic acids of invaders. To counteract this defence, phages can produce small proteins that inhibit these nucleases, termed anti-CRISPRs (Acrs). Here we demonstrate that the ΦAP1.1 temperate phage utilizes an alternative approach to antagonize the type II-A CRISPR response in Streptococcus pyogenes. Immediately after infection, this phage expresses a small anti-CRISPR protein, AcrIIA23, that prevents Cas9 function, allowing ΦAP1.1 to integrate into the direct repeats of the CRISPR locus, neutralizing immunity. However, acrIIA23 is not transcribed during lysogeny and phage integration/excision cycles can result in the deletion and/or transduction of spacers, enabling a complex modulation of the type II-A CRISPR immune response. A bioinformatic search identified prophages integrated not only in the CRISPR repeats, but also the cas genes, of diverse bacterial species, suggesting that prophage disruption of the CRISPR-cas locus is a recurrent mechanism to counteract immunity.

Indexed as

Clustered Regularly Interspaced Short Palindromic RepeatsLysogenyPlasmidsProphagesStreptococcus PhagesStreptococcus pyogenesVirus Integration

Identifiers

PMID34819640
OpenAlexW3215300692

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.