Evidence map›Paper›PMID 27997045›Full record

ArticleMolecular ecology2017

Dynamics of Escherichia coli type I-E CRISPR spacers over 42 000 years.

Ekaterina Savitskaya, Anna Lopatina, Sofia Medvedeva, Mikhail Kapustin, Sergey Shmakov, Alexey Tikhonov, Irena I Artamonova, Maria Logacheva, Konstantin Severinov

Abstract read
In one paragraph

Article in Molecular ecology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
–field-weighted citation impact
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.

  1. TheEcoSal Plus · 2025
    Review
  2. Article
  3. CRISPR-Cas Controls Cryptic Prophages.International journal of molecular sciences · 2022
    Article
  4. Distribution of CRISPR inAnimals : an open access journal from MDPI · 2022
    Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Article
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  18. Article
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

9 authors.

Ekaterina SavitskayaSkolkovo Institute of Science and Technology, Skolkovo, Russia.
Anna LopatinaInstitute of Molecular Genetics, Russian Academy of Sciences, Moscow, Russia.
Sofia MedvedevaSkolkovo Institute of Science and Technology, Skolkovo, Russia.
Mikhail KapustinSkolkovo Institute of Science and Technology, Skolkovo, Russia.
Sergey ShmakovSkolkovo Institute of Science and Technology, Skolkovo, Russia.
Alexey TikhonovZoological Institute, Russian Academy of Sciences, St. Petersburg, Russia.
Irena I ArtamonovaN.I. Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia.
Maria LogachevaM.V. Lomonosov Moscow State University, Moscow, Russia.
Konstantin SeverinovSkolkovo Institute of Science and Technology, Skolkovo, Russia.

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
NIGMS NIH HHS R01 GM104071
6 · The paper itself

Abstract

CRISPR-Cas are nucleic acid-based prokaryotic immune systems. CRISPR arrays accumulate spacers from foreign DNA and provide resistance to mobile genetic elements containing identical or similar sequences. Thus, the set of spacers present in a given bacterium can be regarded as a record of encounters of its ancestors with genetic invaders. Such records should be specific for different lineages and change with time, as earlier acquired spacers get obsolete and are lost. Here, we studied type I-E CRISPR spacers of Escherichia coli from extinct pachyderm. We find that many spacers recovered from intestines of a 42 000-year-old mammoth match spacers of present-day E. coli. Present-day CRISPR arrays can be reconstructed from palaeo sequences, indicating that the order of spacers has also been preserved. The results suggest that E. coli CRISPR arrays were not subject to intensive change through adaptive acquisition during this time.

Indexed as

Biological EvolutionClustered Regularly Interspaced Short Palindromic RepeatsAnimalsDNA, AncientDNA, BacterialEscherichia coliIntestinesMammothsSequence Analysis, DNADNA, AncientDNA, BacterialCRISPR arraysCRISPR spacersEscherichia colipalaeo DNA

Identifiers

PMID27997045
PMCPMC5851898

What OpenQuestion holds

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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.