Evidence map›Paper›PMID 33011743›Full record

ArticleThe ISME journal2021

Phage gene expression and host responses lead to infection-dependent costs of CRISPR immunity.

Sean Meaden, Loris Capria, Ellinor Alseth, Sylvain Gandon, Ambarish Biswas, Luca Lenzi, Stineke van Houte, Edze R Westra

Erratum issuedOpen access · hybridAbstract read
In one paragraph

Article in The ISME journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

18 citing papers in PubMed, 40 citations in OpenAlex.

  1. Article
  2. Phage provoke growth delays and SOS response induction despite CRISPR-Cas protection.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  3. Complementary killing activities ofAntimicrobial agents and chemotherapy · 2025
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  13. Polyamines and linear DNA mediate bacterial threat assessment of bacteriophage infection.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  14. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 3 countries.

Sean MeadenBiosciences, University of Exeter, Exeter, TR10 9EZ, UK. s.meaden@exeter.ac.uk.ORCID http://orcid.org/0000-0002-9748-6937
Loris CapriaBiosciences, University of Exeter, Exeter, TR10 9EZ, UK.
Ellinor AlsethBiosciences, University of Exeter, Exeter, TR10 9EZ, UK.ORCID http://orcid.org/0000-0001-5665-6795
Sylvain GandonCEFE, Univ Montpellier, CNRS, EPHE, IRD, Univ Paul Valéry Montpellier 3, Montpellier, France.
Ambarish BiswasDepartment of Microbiology and Immunology, University of Otago, Dunedin, New Zealand.
Luca LenziInstitute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK.
Stineke van HouteBiosciences, University of Exeter, Exeter, TR10 9EZ, UK.
Edze R WestraBiosciences, University of Exeter, Exeter, TR10 9EZ, UK. e.r.westra@exeter.ac.uk.ORCID http://orcid.org/0000-0003-4396-0354
University of Exeter · GBCentre National de la Recherche Scientifique · FRUniversity of Liverpool · GBUniversity of Otago · NZ

Funding

Biotechnology and Biological Sciences Research Council BB/R010781/1Wellcome Trust
6 · The paper itself

Abstract

CRISPR-Cas immune systems are widespread in bacteria and archaea, but not ubiquitous. Previous work has demonstrated that CRISPR immunity is associated with an infection-induced fitness cost, which may help explain the patchy distribution observed. However, the mechanistic basis of this cost has remained unclear. Using Pseudomonas aeruginosa PA14 and its phage DMS3vir as a model, we perform a 30-day evolution experiment under phage mediated selection. We demonstrate that although CRISPR is initially selected for, bacteria carrying mutations in the phage receptor rapidly invade the population following subsequent reinfections. We then test three potential mechanisms for the observed cost of CRISPR: (1) autoimmunity from the acquisition of self-targeting spacers, (2) immunopathology or energetic costs from increased cas gene expression and (3) toxicity caused by phage gene expression prior to CRISPR-mediated cleavage. We find that phages can express genes before the immune system clears the infection and that expression of these genes can have a negative effect on host fitness. While infection does not lead to increased expression of cas genes, it does cause differential expression of multiple other host processes that may further contribute to the cost of CRISPR immunity. In contrast, we found little support for infection-induced autoimmunological and immunopathological effects. Phage gene expression prior to cleavage of the genome by the CRISPR-Cas immune system is therefore the most parsimonious explanation for the observed phage-induced fitness cost.

Indexed as

BacteriophagesClustered Regularly Interspaced Short Palindromic RepeatsCRISPR-Cas SystemsGene ExpressionPseudomonas aeruginosa

Identifiers

PMID33011743
PMCPMC8027618
OpenAlexW3091690232

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.