Evidence map›Paper›PMID 26586800›Full record

ArticleNucleic acids research2015

CRISPR interference and priming varies with individual spacer sequences.

Chaoyou Xue, Arun S Seetharam, Olga Musharova, Konstantin Severinov, Stan J J Brouns, Andrew J Severin, Dipali G Sashital

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed
7.8field-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

71 citing papers in PubMed, 111 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Identification of PAM Requirements for thebioRxiv : the preprint server for biology · 2025
    Article
  6. TheEcoSal Plus · 2025
    Review
  7. Phage susceptibility to a minimal, modular synthetic CRISPR-Cas system inPhilosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Endogenous CRISPR/Cas systems for genome engineering in the acetogensFrontiers in bioengineering and biotechnology · 2023
    Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article

11 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 3 institutions in 3 countries.

Chaoyou XueRoy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, Ames, IA 50011, USA.
Arun S SeetharamGenome Informatics Facility, Office of Biotechnology, Iowa State University Ames, IA 50011, USA.
Olga MusharovaInstitutes of Gene Biology and Molecular Genetics, Russian Academy of Sciences, Moscow 119991, Russia Skolkovo Institute of Science and Technology, Skolkovo, Russia, Moscow, Russia Peter the Great Polytechnical University, St. Petersburg, Russia.
Konstantin SeverinovInstitutes of Gene Biology and Molecular Genetics, Russian Academy of Sciences, Moscow 119991, Russia Skolkovo Institute of Science and Technology, Skolkovo, Russia, Moscow, Russia Peter the Great Polytechnical University, St. Petersburg, Russia Waksman Institute of Microbiology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
Stan J J BrounsLaboratory of Microbiology, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, the Netherlands.
Andrew J SeverinGenome Informatics Facility, Office of Biotechnology, Iowa State University Ames, IA 50011, USA.
Dipali G SashitalRoy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, Ames, IA 50011, USA sashital@iastate.edu.
Iowa State University · USSkolkovo Institute of Science and Technology · RUWageningen University & Research · NL

Funding

The Function of Small RNA-Based viral Defense System in E. coli - Renewal 1R01GM104071 · NIGMS · RUTGERS, THE STATE UNIV OF N.J. · PI SEMENOVA, EKATERINA · 2013 to 2024
$3.9M
European Research Council 639707NIGMS NIH HHS GM10407NIGMS NIH HHS R01 GM104071
6 · The paper itself

Abstract

CRISPR-Cas (clustered regularly interspaced short palindromic repeats-CRISPR associated) systems allow bacteria to adapt to infection by acquiring 'spacer' sequences from invader DNA into genomic CRISPR loci. Cas proteins use RNAs derived from these loci to target cognate sequences for destruction through CRISPR interference. Mutations in the protospacer adjacent motif (PAM) and seed regions block interference but promote rapid 'primed' adaptation. Here, we use multiple spacer sequences to reexamine the PAM and seed sequence requirements for interference and priming in the Escherichia coli Type I-E CRISPR-Cas system. Surprisingly, CRISPR interference is far more tolerant of mutations in the seed and the PAM than previously reported, and this mutational tolerance, as well as priming activity, is highly dependent on spacer sequence. We identify a large number of functional PAMs that can promote interference, priming or both activities, depending on the associated spacer sequence. Functional PAMs are preferentially acquired during unprimed 'naïve' adaptation, leading to a rapid priming response following infection. Our results provide numerous insights into the importance of both spacer and target sequences for interference and priming, and reveal that priming is a major pathway for adaptation during initial infection.

Indexed as

Clustered Regularly Interspaced Short Palindromic RepeatsCRISPR-Cas SystemsCRISPR-Associated ProteinsEndodeoxyribonucleasesEscherichia coliEscherichia coli ProteinsGenome, BacterialHigh-Throughput Nucleotide SequencingMutationCRISPR-Associated ProteinsEndodeoxyribonucleasesEscherichia coli Proteins

Identifiers

PMID26586800
PMCPMC4678831
OpenAlexW2221533814

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.