Evidence map›Paper›PMID 20624226›Full record

ArticleMolecular microbiology2010

Transcription, processing and function of CRISPR cassettes in Escherichia coli.

Ksenia Pougach, Ekaterina Semenova, Ekaterina Bogdanova, Kirill A Datsenko, Marko Djordjevic, Barry L Wanner, Konstantin Severinov

Abstract read
In one paragraph

Article in Molecular microbiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 130 papers.

0numbers the graph read from it
0cells of the map it votes in
130citing papers in PubMed
10.0field-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

130 citing papers in PubMed, 230 citations in OpenAlex.

  1. Article
  2. Article
  3. Molecular kinetics dictate population dynamics in CRISPR-based plasmid defense.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  4. Article
  5. TheEcoSal Plus · 2025
    Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. The H-NS homologues MvaT and MvaU repress CRISPR-Cas inPhilosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  11. Article
  12. Article
  13. Article
  14. Comparative Genomics of Clostridioides difficile.Advances in experimental medicine and biology · 2024
    Article
  15. Article
  16. Review
  17. Review
  18. CRISPR-Cas Controls Cryptic Prophages.International journal of molecular sciences · 2022
    Article
  19. Article
  20. Article

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

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 4 institutions in 2 countries.

Ksenia PougachInstitutes of Molecular Genetics and Gene Biology, Russian Academy of Sciences, Moscow, Russia.
Ekaterina Semenova
Ekaterina Bogdanova
Kirill A Datsenko
Marko Djordjevic
Barry L Wanner
Konstantin Severinov
Ackerman Institute for the Family · USPurdue University West Lafayette · USArkansas State University · USInstitute of Gene Biology · RU

Funding

Phage-induced modifications of RNA polymeraseR01GM059295 · NIGMS · RUTGERS THE ST UNIV OF NJ NEW BRUNSWICK · PI SEVERINOV, KONSTANTIN V · 1999 to 2013
$4.5M
NIGMS NIH HHS R01 GM059295NIGMS NIH HHS R01 GM59295
6 · The paper itself

Abstract

CRISPR/Cas, bacterial and archaeal systems of interference with foreign genetic elements such as viruses or plasmids, consist of DNA loci called CRISPR cassettes (a set of variable spacers regularly separated by palindromic repeats) and associated cas genes. When a CRISPR spacer sequence exactly matches a sequence in a viral genome, the cell can become resistant to the virus. The CRISPR/Cas systems function through small RNAs originating from longer CRISPR cassette transcripts. While laboratory strains of Escherichia coli contain a functional CRISPR/Cas system (as judged by appearance of phage resistance at conditions of artificial co-overexpression of Cas genes and a CRISPR cassette engineered to target a λ-phage), no natural phage resistance due to CRISPR system function was observed in this best-studied organism and no E. coli CRISPR spacer matches sequences of well-studied E. coli phages. To better understand the apparently 'silent'E. coli CRISPR/Cas system, we systematically characterized processed transcripts from CRISPR cassettes. Using an engineered strain with genomically located spacer matching phage λ we show that endogenous levels of CRISPR cassette and cas genes expression allow only weak protection against infection with the phage. However, derepression of the CRISPR/Cas system by disruption of the hns gene leads to high level of protection.

Indexed as

Inverted Repeat SequencesTranscription, Genetic5' Untranslated RegionsBacteriophage lambdaBase SequenceDNA, BacterialDNA, IntergenicEscherichia coliGene Expression Regulation, BacterialMolecular Sequence DataPromoter Regions, GeneticRNA Processing, Post-Transcriptional5' Untranslated RegionsDNA, BacterialDNA, Intergenic

Identifiers

PMID20624226
PMCPMC2939963
OpenAlexW2163723712

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.