Evidence map›Paper›PMID 21219465›Full record

ArticleMolecular microbiology2011

A dual function of the CRISPR-Cas system in bacterial antivirus immunity and DNA repair.

Mohan Babu, Natalia Beloglazova, Robert Flick, Chris Graham, Tatiana Skarina, Boguslaw Nocek, Alla Gagarinova, Oxana Pogoutse, Greg Brown, Andrew Binkowski and 8 more

Open access · bronzeAbstract read
In one paragraph

Article in Molecular microbiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 140 papers.

0numbers the graph read from it
0cells of the map it votes in
140citing papers in PubMed
9.3field-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

140 citing papers in PubMed, 263 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. CRISPR adaptation inmSphere · 2025
    Article
  7. Article
  8. Article
  9. CRISPR-Cas Systems: A Functional Perspective and Innovations.International journal of molecular sciences · 2025
    Review
  10. Article
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Review
  17. Review
  18. Review
  19. Article
  20. Article

80 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

18 authors at 4 institutions in 3 countries.

Mohan BabuBanting and Best Department of Medical Research, University of Toronto, Toronto, Ontario, M5G 1L6, Canada.
Natalia Beloglazova
Robert Flick
Chris Graham
Tatiana Skarina
Boguslaw Nocek
Alla Gagarinova
Oxana Pogoutse
Greg Brown
Andrew Binkowski
Sadhna Phanse
Andrzej Joachimiak
Eugene V Koonin
Alexei Savchenko
Andrew Emili
Jack Greenblatt
Aled M Edwards
Alexander F Yakunin
University of Toronto · CAArgonne National Laboratory · USNational Institutes of Health · USWested · US

Funding

The Midwest Center for Structural GenomicsU54GM074942 · NIGMS · UNIVERSITY OF CHICAGO · PI JOACHIMIAK, ANDRZEJ · 2005 to 2009
$51.0M
Finding Protein Sequence Motifs--Methods And ApplicationsZIALM000061 · NLM · NATIONAL LIBRARY OF MEDICINE · PI KOONIN, EUGENE V · 2009 to 2025
$10.6M
CIHR 82852Intramural NIH HHSNIGMS NIH HHS GM074942NIGMS NIH HHS U54 GM074942
6 · The paper itself

Abstract

Clustered Regularly Interspaced Short Palindromic Repeats (CRISPRs) and the associated proteins (Cas) comprise a system of adaptive immunity against viruses and plasmids in prokaryotes. Cas1 is a CRISPR-associated protein that is common to all CRISPR-containing prokaryotes but its function remains obscure. Here we show that the purified Cas1 protein of Escherichia coli (YgbT) exhibits nuclease activity against single-stranded and branched DNAs including Holliday junctions, replication forks and 5'-flaps. The crystal structure of YgbT and site-directed mutagenesis have revealed the potential active site. Genome-wide screens show that YgbT physically and genetically interacts with key components of DNA repair systems, including recB, recC and ruvB. Consistent with these findings, the ygbT deletion strain showed increased sensitivity to DNA damage and impaired chromosomal segregation. Similar phenotypes were observed in strains with deletion of CRISPR clusters, suggesting that the function of YgbT in repair involves interaction with the CRISPRs. These results show that YgbT belongs to a novel, structurally distinct family of nucleases acting on branched DNAs and suggest that, in addition to antiviral immunity, at least some components of the CRISPR-Cas system have a function in DNA repair.

Indexed as

DNA RepairRepetitive Sequences, Nucleic AcidColiphagesCRISPR-Associated ProteinsCrystallography, X-RayDeoxyribonucleasesDNA Repair EnzymesEndodeoxyribonucleasesEscherichia coliEscherichia coli ProteinsGene DeletionModels, MolecularMutagenesis, Site-DirectedMutant ProteinsCRISPR-Associated ProteinsDeoxyribonucleasesDNA Repair EnzymesEndodeoxyribonucleasesEscherichia coli ProteinsMutant ProteinsYgbT protein, E coli

Identifiers

PMID21219465
PMCPMC3071548
OpenAlexW2101983500

What OpenQuestion holds

Textmetadata
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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.