Evidence map›Paper›PMID 23584588›Full record

ArticleNature2013

A CRISPR/Cas system mediates bacterial innate immune evasion and virulence.

Timothy R Sampson, Sunil D Saroj, Anna C Llewellyn, Yih-Ling Tzeng, David S Weiss

Erratum issuedAbstract read
In one paragraph

Article in Nature, 2013. 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 229 papers.

0numbers the graph read from it
0cells of the map it votes in
229citing papers in PubMed
21.5field-weighted citation impact, top 1% 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

229 citing papers in PubMed, 438 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Cas9 modulatesMicrobiology (Reading, England) · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. Review
  18. Frontiers in cellular and infection microbiology · 2025
    Review
  19. CRISPRJournal of oral microbiology · 2025
    Article
  20. Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Timothy R SampsonMicrobiology and Molecular Genetics Program, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia 30329, USA.
Sunil D Saroj
Anna C Llewellyn
Yih-Ling Tzeng
David S Weiss
Emory University · US

Funding

Yessinia autotransporters (Yaps): Structure, function, and host responseU54AI057157 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI GOLDMAN, WILLIAM E · 2003 to 2013
$91.4M
Modulation of host defenses by the bacterial pathogen Francisella tularensisR56AI087673 · NIAID · EMORY UNIVERSITY · PI WEISS, DAVID S · 2011 to 2011
$440k
Control of virulence in Neisseria meningitidisR56AI061031 · NIAID · EMORY UNIVERSITY · PI TZENG, YIH-LING · 2012 to 2012
$351k
NIAID NIH HHS R56 AI061031NIAID NIH HHS R56-AI061031NIAID NIH HHS R56 AI087673NIAID NIH HHS R56-AI87673NIAID NIH HHS U54 AI057157NIAID NIH HHS U54-AI057157
6 · The paper itself

Abstract

CRISPR/Cas (clustered regularly interspaced palindromic repeats/CRISPR-associated) systems are a bacterial defence against invading foreign nucleic acids derived from bacteriophages or exogenous plasmids. These systems use an array of small CRISPR RNAs (crRNAs) consisting of repetitive sequences flanking unique spacers to recognize their targets, and conserved Cas proteins to mediate target degradation. Recent studies have suggested that these systems may have broader functions in bacterial physiology, and it is unknown if they regulate expression of endogenous genes. Here we demonstrate that the Cas protein Cas9 of Francisella novicida uses a unique, small, CRISPR/Cas-associated RNA (scaRNA) to repress an endogenous transcript encoding a bacterial lipoprotein. As bacterial lipoproteins trigger a proinflammatory innate immune response aimed at combating pathogens, CRISPR/Cas-mediated repression of bacterial lipoprotein expression is critical for F. novicida to dampen this host response and promote virulence. Because Cas9 proteins are highly enriched in pathogenic and commensal bacteria, our work indicates that CRISPR/Cas-mediated gene regulation may broadly contribute to the regulation of endogenous bacterial genes, particularly during the interaction of such bacteria with eukaryotic hosts.

Indexed as

Immune EvasionAnimalsFemaleGammaproteobacteriaGenes, BacterialHost-Pathogen InteractionsImmunity, InnateMiceMice, Inbred C57BLPhylogenyRNA, BacterialTime FactorsToll-Like Receptor 2VirulenceRNA, BacterialToll-Like Receptor 2

Identifiers

PMID23584588
PMCPMC3651764
OpenAlexW2009576434

What OpenQuestion holds

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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.